CN111829915A - Method for rapidly measuring total amount of soil water-soluble salt - Google Patents
Method for rapidly measuring total amount of soil water-soluble salt Download PDFInfo
- Publication number
- CN111829915A CN111829915A CN202010730009.3A CN202010730009A CN111829915A CN 111829915 A CN111829915 A CN 111829915A CN 202010730009 A CN202010730009 A CN 202010730009A CN 111829915 A CN111829915 A CN 111829915A
- Authority
- CN
- China
- Prior art keywords
- water
- soil
- soluble salt
- solution
- drying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 73
- 150000003839 salts Chemical class 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000001035 drying Methods 0.000 claims abstract description 29
- 230000003068 static effect Effects 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000005303 weighing Methods 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000007605 air drying Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 230000006698 induction Effects 0.000 claims description 14
- 238000001704 evaporation Methods 0.000 claims description 11
- 230000008020 evaporation Effects 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 7
- 238000005119 centrifugation Methods 0.000 claims description 6
- 238000007602 hot air drying Methods 0.000 claims description 2
- 238000002386 leaching Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 5
- 239000000084 colloidal system Substances 0.000 abstract description 4
- 235000002639 sodium chloride Nutrition 0.000 description 51
- 239000000243 solution Substances 0.000 description 42
- 230000000052 comparative effect Effects 0.000 description 9
- 238000005259 measurement Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009775 high-speed stirring Methods 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000703 high-speed centrifugation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000011147 magnesium chloride Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4055—Concentrating samples by solubility techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a method for rapidly measuring the total amount of soil water-soluble salt, which comprises the following steps of (1) air-drying a soil sample, crushing, (2) adding water into the weighed soil sample, mixing, stirring at a high speed of 3000-3500 r/min for 1-2 min under the condition of an alternating magnetic field, and filtering within 60-80 s to obtain a separation solution; (3) standing the separated liquid for 2-3 min under the condition of a static magnetic field, centrifuging the separated liquid at the rotating speed of 11000-13000 r/min, and filtering; (4) taking the solution to be detected, drying the solution to be detected in a water bath until the solution is crystalline, drying the crystalline solution to constant weight, cooling the crystalline solution, and weighing the crystalline solution to obtain the weight value of the soil water-soluble salt; the determination method of the invention can achieve the effect of more fully leaching and rapidly dissolving the water-soluble salt and realize the separation of the small groups of colloid particles from the fully water-soluble salt, thereby effectively improving the efficiency and the accuracy of the determination of the total amount of the water-soluble salt in the soil.
Description
Technical Field
The invention relates to the technical field of soil detection, in particular to a method for rapidly determining the total amount of water-soluble salts in soil.
Background
The water-soluble full salt content is one of important indexes for evaluating the production performance of cultivated land. Water-soluble salts in the soil include sodium chloride, potassium chloride, magnesium chloride, sodium bicarbonate, sodium sulfate, and the like. In the process of implementing the improvement of the saline-alkali soil, the content of water-soluble salt in the saline-alkali soil is firstly analyzed, and then a scientific, applicable and economic method is selected to obtain a better planting effect and be beneficial to the growth of crops.
The existing commonly used method for measuring the total amount of soil water-soluble salt components mainly comprises a mass method and an electric conduction method. The conductivity method is characterized in that the concentration of ions such as sodium metal and magnesium metal in saline-alkali soil aqueous solution is utilized to be related to conductivity, a conductivity equation is established to determine the content of water-soluble salt, comprehensive analysis is often needed to be carried out on the determined data, and specific conductivity data are converted to be effectively referred to and applied, so that at present, no uniform conductivity standard of soil water-soluble salt components exists all the time. In the mass method, the existing mass method mainly measures the mass of the water-soluble salt passing through the soil, but the accuracy of the measurement result is affected by the problems that the leaching time of the water-soluble salt in the soil is limited by impurities, the leaching effect is low, the measurement result is high due to the fact that the leaching solution is easily subjected to impurities such as colloidal particles which are difficult to remove, and the like, so that the method for measuring the total amount of the water-soluble salt in the soil needs to be optimized in one step to fully improve the accuracy and stability of the measurement of the total amount of the water-soluble salt in the soil.
Disclosure of Invention
In view of the above, the invention provides a method for rapidly measuring the total amount of soil water-soluble salts.
The technical scheme of the invention is realized as follows:
the invention provides a method for rapidly measuring the total amount of soil water-soluble salt, which comprises the following steps:
(1) thinning: weighing a soil sample, crushing, sieving with a 10-20-mesh sieve, and air-drying;
(2) dissolving and separating: adding water into a soil sample according to a material-liquid ratio of 1 (5-8) g/ml, mixing, stirring at a high speed of 3000-3500 r/min for 1-2 min under the condition of an alternating magnetic field to form a dissolved solution, and filtering the dissolved solution within 60-80 s to obtain a separation solution;
(3) centrifuging: standing the separated liquid for 2-3 min at a constant temperature of 25-27 ℃ under the condition of a static magnetic field, centrifuging the separated liquid at a rotating speed of 11000-13000 r/min, and filtering to obtain a liquid to be detected;
(4) and (3) drying: and (3) drying the solution to be detected to dryness in a water bath until crystals are formed, putting the crystals at the temperature of 120-130 ℃ for drying to constant weight, cooling the crystals in a drying box, and weighing to obtain the weight value of the soil water-soluble salt. According to the invention, through the main adoption of a rapid dissolving and separating mode combining an alternating magnetic field and high-speed stirring on the refined soil sample, under the action of the stirring force of high-speed rotation and the magnetic force of the alternating magnetic field, impurities such as colloid groups with larger volume in a mixed solution are more rapidly dispersed, and the effects of more fully leaching and rapidly dissolving water-soluble salt are realized; and the separating medium is kept still at a constant temperature in a static magnetic field and then is separated from the sufficient water-soluble salt under the action of certain high-speed centrifugation, so that the efficiency and the accuracy of the total amount determination of the soil water-soluble salt are effectively improved, and the relative standard deviation of the total amount determination of the soil water-soluble salt can reach below 0.04 according to experimental results.
Further, in the step (2), the magnetic induction intensity of the alternating magnetic field is 0.2-0.25T, and the frequency of the alternating current is 30-50 Hz.
Further, in the step (2), the stirring speed is 3200r/min, and the stirring time is 2min, so that the water-soluble salts in the soil can be rapidly and fully leached and dissolved into the water.
Further, in the step (3), the separated liquid is allowed to stand at a temperature of 26 ℃ for 2.5 min.
In step (3), the magnetic induction intensity of the static magnetic field is 0.03 to 0.08T.
Further, in the step (3), the centrifugation rate is 12000r/min, and the centrifugation time is 30-60 s.
Further, in the step (5), the water bath evaporation temperature is 105-110 ℃, and the hot air drying temperature is 125 ℃.
Further explaining, in the step (5), when the water bath is evaporated to dryness and concentrated to 60-65% of the volume of the original liquid to be detected, the evaporation temperature of the water bath is adjusted to 85-90 ℃, and the water bath is stirred once every 30-60 s, so that the quality stability of the water-soluble salt in the process of evaporating to dryness of the water bath is ensured.
Compared with the prior art, the invention has the beneficial effects that: in order to fully improve the leaching effect of water-soluble salts in the salinized soil, on the basis of refining the soil sample, a rapid dissolving and separating mode of combining an alternating magnetic field with high-speed stirring is adopted, and under the action of stirring force of high-speed rotation and the magnetic force of the alternating magnetic field, impurities such as colloid groups with larger volume in a mixed solution are more rapidly dispersed under the action of the magnetic field, so that the full leaching and rapid dissolving of the water-soluble salts in the mixed solution are facilitated; meanwhile, the separating liquid is kept still at a constant temperature in a static magnetic field, so that small colloidal particle groups dispersed in water are magnetized, and finally, under the action of rapid centrifugation, the small colloidal particle groups are separated from sufficient water-soluble salt, and the aim of effectively improving the determination accuracy of the water-soluble salt is fulfilled, so that the total amount of the soil water-soluble salt can be determined more rapidly, accurately and stably, and the relative standard deviation of the determination of the total amount of the soil water-soluble salt can reach below 0.04 according to experimental results.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
Example 1-a method for rapid determination of total soil water-soluble salt content comprising the steps of:
(1) thinning: weighing a soil sample, crushing, sieving with a 10-mesh sieve, and air-drying;
(2) dissolving and separating: adding water into a soil sample according to a material-liquid ratio of 1:5g/ml, mixing, stirring at a high speed of 3000r/min for 1min under the condition of an alternating magnetic field to form a dissolved solution, and filtering the dissolved solution within 60s to obtain a separation solution; wherein, the magnetic induction intensity of the alternating magnetic field is 0.2T, and the frequency of the alternating current is 30 Hz;
(3) centrifuging: standing the separated liquid at constant temperature of 25 deg.C for 2min under static magnetic field, centrifuging at 11000r/min for 30s, and filtering to obtain liquid to be detected; wherein the magnetic induction intensity of the static magnetic field is 0.03T;
(4) and (3) drying: and (3) drying the solution to be detected to dryness to obtain a crystalline substance by water bath at 105 ℃, adjusting the drying temperature of the water bath to 85 ℃ when the solution to be detected is dried to dryness and concentrated to 60% of the volume of the original liquid to be detected in the water bath, stirring once at intervals of 30s, finally drying the solution to constant weight by hot air at 120 ℃, cooling the solution in a drying box, and weighing the solution to obtain the weight value of the soil water-soluble salt.
Example 2-a method for rapid determination of total soil water-soluble salt content, comprising the steps of:
(1) thinning: weighing a soil sample, crushing, sieving with a 20-mesh sieve, and air-drying;
(2) dissolving and separating: adding water into the soil sample according to the material-liquid ratio of 1:6g/ml, mixing, stirring at 3100r/min for 1.5min under the condition of alternating magnetic field to form a solution, and filtering the solution within 80s to obtain a separation solution; wherein, the magnetic induction intensity of the alternating magnetic field is 0.2T, and the frequency of the alternating current is 30 Hz;
(3) centrifuging: standing the separated liquid at constant temperature of 25 deg.C for 2.5min under static magnetic field, centrifuging at 11500r/min for 30s, and filtering to obtain the liquid to be detected; wherein the magnetic induction intensity of the static magnetic field is 0.03T;
(4) and (3) drying: and (3) drying the solution to be detected to dryness to obtain a crystalline substance by water bath at 105 ℃, adjusting the drying temperature of the water bath to 85 ℃ when the solution to be detected is dried to dryness and concentrated to 60% of the volume of the original liquid to be detected in the water bath, stirring once at intervals of 30s, finally drying the solution to constant weight by hot air at 120 ℃, cooling the solution in a drying box, and weighing the solution to obtain the weight value of the soil water-soluble salt.
Example 3-a method for rapid determination of total soil water-soluble salt content, comprising the steps of:
(1) thinning: weighing a soil sample, crushing, sieving with a 20-mesh sieve, and air-drying;
(2) dissolving and separating: adding water into the soil sample according to the material-liquid ratio of 1:8g/ml, mixing, stirring at high speed of 3300r/min for 2min under the condition of alternating magnetic field to form a dissolved solution, and filtering the dissolved solution within 80s to obtain a separation solution; wherein, the magnetic induction intensity of the alternating magnetic field is 0.23T, and the frequency of the alternating current is 50 Hz;
(3) centrifuging: standing the separated liquid at constant temperature of 27 deg.C for 3min under static magnetic field, centrifuging at 12500r/min for 60s, and filtering to obtain liquid to be detected; wherein the magnetic induction intensity of the static magnetic field is 0.05T;
(4) and (3) drying: and (3) carrying out water bath evaporation on the solution to be detected at 108 ℃ to dryness to obtain crystals, adjusting the evaporation temperature of the water bath to 88 ℃ when the solution to be detected is evaporated to dryness and concentrated to 63% of the volume of the original liquid to be detected, stirring the solution once at intervals of 60s, finally drying the solution to be detected by hot air at 130 ℃ to constant weight, cooling the solution in a drying box, and weighing the solution to obtain the weight value of the soil water-soluble salt.
Example 4-a method for rapid determination of total soil water-soluble salt content, comprising the steps of:
(1) thinning: weighing a soil sample, crushing, sieving with a 20-mesh sieve, and air-drying;
(2) dissolving and separating: adding water into the soil sample according to the material-liquid ratio of 1:8g/ml, mixing, stirring at a high speed of 3500r/min for 2min under the condition of an alternating magnetic field to form a dissolved solution, and filtering the dissolved solution within 80s to obtain a separation solution; wherein, the magnetic induction intensity of the alternating magnetic field is 0.25T, and the frequency of the alternating current is 50 Hz;
(3) centrifuging: standing the separated liquid at constant temperature of 27 deg.C for 3min under static magnetic field, centrifuging at 13000r/min for 60s, and filtering to obtain liquid to be detected; wherein the magnetic induction intensity of the static magnetic field is 0.08T;
(4) and (3) drying: and (3) carrying out water bath evaporation on the solution to be detected at 110 ℃ until the solution to be detected is dried to a crystalline substance, adjusting the water bath evaporation temperature to 90 ℃ when the solution to be detected is evaporated to dryness and concentrated to 65% of the volume of the original liquid to be detected, stirring once at intervals of 60s, finally placing the solution at 130 ℃ for drying to constant weight, cooling the solution in a drying box, and weighing the solution to obtain the weight value of the soil water-soluble salt.
Example 5-a method for rapid determination of total soil water-soluble salt content comprising the steps of:
(1) thinning: weighing a soil sample, crushing, sieving with a 20-mesh sieve, and air-drying;
(2) dissolving and separating: adding water into the soil sample according to the material-liquid ratio of 1:6g/ml, mixing, stirring at a high speed of 3200r/min for 1.5min under the condition of an alternating magnetic field to form a dissolved solution, and filtering the dissolved solution within 60s to obtain a separation solution; wherein, the magnetic induction intensity of the alternating magnetic field is 0.23T, and the frequency of the alternating current is 50 Hz;
(3) centrifuging: standing the separated liquid at a constant temperature of 26 ℃ for 2.5min under the condition of a static magnetic field, centrifuging the separated liquid at a rotating speed of 12000r/min for 60s, and filtering to obtain a liquid to be detected; wherein the magnetic induction intensity of the static magnetic field is 0.05T;
(4) and (3) drying: and (3) carrying out water bath evaporation on the liquid to be detected at 108 ℃ to dryness to obtain crystals, adjusting the evaporation temperature of the water bath to 88 ℃ when the liquid to be detected is evaporated to dryness and concentrated to 63% of the volume of the original liquid to be detected, stirring the liquid at intervals of 30s, finally placing the liquid at 125 ℃ for drying by hot air to constant weight, cooling the liquid in a drying box, and weighing the liquid to obtain the weight value of the soil water-soluble salt.
Comparative example 1-method for rapidly measuring the total amount of water-soluble salts in soil according to example 5, except that, in the step (2), after a soil sample is mixed with water, it is directly stirred at a high speed of 3000r/min for 1.5min, and the steps and parameters are the same as those of example 5.
Comparative example 2-method for rapidly measuring the total amount of water-soluble salts in soil according to example 5, except that, in the step (2), after mixing a soil sample with water, it was stirred at a speed of 500r/min for 2min under the condition of an alternating magnetic field, and the rest of the steps and parameters were the same as those of example 5.
Comparative example 3-method for rapidly measuring the total amount of water-soluble salts in soil according to example 5, except that, in the step (3), the separated liquid was centrifuged at 12000r/min directly in the absence of static magnetic field for 60s, and the rest of the procedure and parameters were the same as in example 5.
Comparative example 4-method for rapidly measuring the total amount of water-soluble salts in soil according to example 5, except that, in the step (3), the separated liquid was centrifuged at 20000r/min without static magnetic field for 60s, and the rest of the procedure and parameters were the same as those of example 5.
The measurement test of water-soluble salts in soil was carried out according to the measurement methods of examples 1 to 5 and comparative examples 1 to 4, by collecting 2.25kg soil in a 0 to 20cm furrow in the same area and dividing it into 9 test groups on average, each test was provided with 5 samples (50g) and each sample was measured 3 times (taking the average value), and the measurement of the components of water-soluble salts in soil by the above different measurement methods was counted respectively, and the results are as follows:
as can be seen from the above table, the method for rapidly determining the total amount of the soil water-soluble salt in the embodiments 1 to 5 of the present invention has high accuracy, and the relative standard deviation can be below 0.04, wherein the accuracy of the determination effect in the embodiment 5 is the highest; meanwhile, according to the comparison between the example 5 and the comparative examples 1-2, the content average value of the total amount of the obtained soil water-soluble salt in the comparative examples 1 and 2 is obviously lower than that in the example 5, which shows that the rapid dissolution and separation mode of combining the alternating magnetic field and the high-speed stirring is adopted in the invention, so that the full leaching and the rapid dissolution of the water-soluble salt are facilitated, and the determination accuracy is improved; compared with the comparative examples 3-4, the content average value of the total amount of the obtained soil water-soluble salt in the comparative examples 3 and 4 is higher than that in the example 5, and the relative standard difference is obviously increased, which shows that the separation liquid is beneficial to separating small groups of colloid particles from sufficient water-soluble salt under the action of certain rapid centrifugation after being stood in a static magnetic field at constant temperature, so that the aim of effectively improving the determination accuracy of the water-soluble salt is fulfilled, and the total amount of the soil water-soluble salt is determined more rapidly, accurately and stably.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method for rapidly measuring the total amount of soil water-soluble salt is characterized by comprising the following steps: the method comprises the following steps:
(1) thinning: weighing a soil sample, crushing, sieving with a 10-20-mesh sieve, and air-drying;
(2) dissolving and separating: adding water into a soil sample according to a material-liquid ratio of 1 (5-8) g/ml, mixing, stirring at a high speed of 3000-3500 r/min for 1-2 min under the condition of an alternating magnetic field to form a dissolved solution, and filtering the dissolved solution within 60-80 s to obtain a separation solution;
(3) centrifuging: standing the separated liquid for 2-3 min at a constant temperature of 25-27 ℃ under the condition of a static magnetic field, centrifuging the separated liquid at a rotating speed of 11000-13000 r/min, and filtering to obtain a liquid to be detected;
(4) and (3) drying: and (3) drying the solution to be detected to dryness in a water bath until crystals are formed, putting the crystals at the temperature of 120-130 ℃ for drying to constant weight, cooling the crystals in a drying box, and weighing to obtain the weight value of the soil water-soluble salt.
2. The method for rapidly determining the total amount of the water-soluble salts in the soil according to claim 1, which is characterized in that: in the step (2), the magnetic induction intensity of the alternating magnetic field is 0.2-0.25T, and the frequency of the alternating current is 30-50 Hz.
3. The method for rapidly determining the total amount of the water-soluble salts in the soil according to claim 1, which is characterized in that: in the step (2), the stirring speed is 3200r/min, and the stirring time is 2 min.
4. The method for rapidly determining the total amount of the water-soluble salts in the soil according to claim 1, which is characterized in that: in the step (3), the separation liquid is kept standing for 2.5min at the temperature of 26 ℃.
5. The method for rapidly determining the total amount of the water-soluble salts in the soil according to claim 1, which is characterized in that: in the step (3), the magnetic induction intensity of the static magnetic field is 0.03-0.08T.
6. The method for rapid determination of a water-soluble salt according to claim 1, wherein: in the step (3), the centrifugation speed is 12000r/min, and the centrifugation time is 30-60 s.
7. The method for rapid determination of a water-soluble salt according to claim 1, wherein: in the step (5), the water bath evaporation temperature is 105-110 ℃, and the hot air drying temperature is 125 ℃.
8. The method for rapid determination of a water-soluble salt according to claim 1, wherein: in the step (5), when the water bath is evaporated to dryness and concentrated to 60-65% of the volume of the original liquid to be measured, the evaporation temperature of the water bath is adjusted to 85-90 ℃, and the stirring is carried out once every 30-60 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010730009.3A CN111829915A (en) | 2020-07-27 | 2020-07-27 | Method for rapidly measuring total amount of soil water-soluble salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010730009.3A CN111829915A (en) | 2020-07-27 | 2020-07-27 | Method for rapidly measuring total amount of soil water-soluble salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111829915A true CN111829915A (en) | 2020-10-27 |
Family
ID=72925639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010730009.3A Pending CN111829915A (en) | 2020-07-27 | 2020-07-27 | Method for rapidly measuring total amount of soil water-soluble salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111829915A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447395A (en) * | 2021-08-10 | 2021-09-28 | 湖北中烟工业有限责任公司 | Detection device for detecting slag content of coating liquid for papermaking-method tobacco sheets |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112189A (en) * | 2001-10-02 | 2003-04-15 | Mitsubishi Corp | Contact device and liquid treatment system |
| CN105258998A (en) * | 2015-11-03 | 2016-01-20 | 浙江海洋学院 | Preparation detection method of adsorbent based on leaked PX in soil |
| US20160274009A1 (en) * | 2012-09-06 | 2016-09-22 | Monsanto Technology Llc | Self-filling soil processing chamber with dynamic extractant volume |
| CN108658594A (en) * | 2018-06-15 | 2018-10-16 | 王颖皓 | The preparation method of high-purity bigger serface Ultra-fine Grained AZO ceramic target powder body materials |
| CN109490021A (en) * | 2019-01-11 | 2019-03-19 | 朱洪芬 | A kind of sampler of soil leaching liquid |
| CN111398085A (en) * | 2020-03-27 | 2020-07-10 | 湖南三德盈泰环保科技有限公司 | Method and device for detecting water-soluble salt of solid sample |
-
2020
- 2020-07-27 CN CN202010730009.3A patent/CN111829915A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112189A (en) * | 2001-10-02 | 2003-04-15 | Mitsubishi Corp | Contact device and liquid treatment system |
| US20160274009A1 (en) * | 2012-09-06 | 2016-09-22 | Monsanto Technology Llc | Self-filling soil processing chamber with dynamic extractant volume |
| CN105258998A (en) * | 2015-11-03 | 2016-01-20 | 浙江海洋学院 | Preparation detection method of adsorbent based on leaked PX in soil |
| CN108658594A (en) * | 2018-06-15 | 2018-10-16 | 王颖皓 | The preparation method of high-purity bigger serface Ultra-fine Grained AZO ceramic target powder body materials |
| CN109490021A (en) * | 2019-01-11 | 2019-03-19 | 朱洪芬 | A kind of sampler of soil leaching liquid |
| CN111398085A (en) * | 2020-03-27 | 2020-07-10 | 湖南三德盈泰环保科技有限公司 | Method and device for detecting water-soluble salt of solid sample |
Non-Patent Citations (4)
| Title |
|---|
| 依艳丽等: "《土壤、生物磁学研究及应用》", 30 September 2001, 中国农业出版社 * |
| 刘光崧: "《土壤理化分析与剖面描述》", 31 October 1996, 中国标准出版社 * |
| 张辉: "《土壤环境学实验教程》", 31 May 2009, 上海交通大学出版社 * |
| 陈云等: "《现代生物医学研究技术实验教程》", 31 January 2019, 武汉大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447395A (en) * | 2021-08-10 | 2021-09-28 | 湖北中烟工业有限责任公司 | Detection device for detecting slag content of coating liquid for papermaking-method tobacco sheets |
| CN113447395B (en) * | 2021-08-10 | 2022-04-12 | 湖北中烟工业有限责任公司 | A solid-liquid separation device for detecting the slag content of tobacco sheet coating liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111303269A (en) | Method for extracting kappa-casein from milk and product thereof | |
| CN104142321A (en) | Method for fast detecting surface enhancing Raman spectrums of pesticide residues in tea leaves | |
| CN111855829B (en) | Method for detecting lactulose in dairy product | |
| CN111829915A (en) | Method for rapidly measuring total amount of soil water-soluble salt | |
| Shokrollahi et al. | Microspectrophotometric determination of erythrosine in beverage and water samples after ultrasonic assisted supramolecular-based dispersion solidification liquid–liquid microextraction | |
| CN113109464A (en) | Method for quantitatively analyzing nano-plastic in environmental water body | |
| CN110646526A (en) | Enrichment analysis method of perfluorinated compounds in food based on magnetic microporous organic network composite material | |
| Mateos et al. | Dispersive solid phase extraction/fluorescence analysis of riboflavin using sepiolite as sorbent | |
| CN115541549A (en) | Rapid screening method for perfluorooctane sulfonate in water body based on zirconium-based fluorescent MOF | |
| Berndt et al. | Preconcentration of trace elements from pure manganese and manganese compounds with activated carbon as collector | |
| CN108226540B (en) | Ellagic acid reagent, preparation method thereof, activated partial thromboplastin time determination reagent and APTT kit | |
| Zhu et al. | Rapid capture and quantification of food-borne spores based on the double-enhanced Fe3O4@ PEI@ Ag@ PEI core-shell structure SERS sensor | |
| CN114088676A (en) | A method to measure cysteine, homocysteine and glutathione | |
| CN112986422A (en) | Method for identifying fresh meat and repeatedly freezing and thawing meat | |
| Christian et al. | Polarographic determination of selenium in biological materials | |
| CN109265500A (en) | Rhamnolipid acid precipitation method | |
| CN115992092A (en) | Method for extracting exosomes based on transition metal oxyhydroxide | |
| CN109180746A (en) | Method for separating and purifying rhamnolipid | |
| CN113624637A (en) | A kind of method for measuring silver content in silver and gold-silver alloy by weight difference subtraction method | |
| CN113155989A (en) | Rapid detection method for acrylamide content in tea | |
| CN109507127A (en) | It is a kind of for detecting the kit of LBP content in human blood | |
| CN108614000A (en) | Manuka honey discrimination method based on SIMCA models | |
| French et al. | A method for blood platelet homogenization using the Aminco-French pressure cell | |
| CN112175051B (en) | Rapid purification method of low-content Bt crystal protein | |
| Eksperiandova et al. | Peculiarities of making gel‐like specimens for x‐ray fluorescence analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201027 |