CN201145651Y - Sampling apparatus for measuring plant discharged N2O and 15/14 N isotopic abundance - Google Patents
Sampling apparatus for measuring plant discharged N2O and 15/14 N isotopic abundance Download PDFInfo
- Publication number
- CN201145651Y CN201145651Y CNU2007201852057U CN200720185205U CN201145651Y CN 201145651 Y CN201145651 Y CN 201145651Y CN U2007201852057 U CNU2007201852057 U CN U2007201852057U CN 200720185205 U CN200720185205 U CN 200720185205U CN 201145651 Y CN201145651 Y CN 201145651Y
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- gas
- parts
- collecting device
- isotopic abundance
- plant
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- 238000005070 sampling Methods 0.000 title claims abstract description 12
- 230000000155 isotopic effect Effects 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 10
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 2
- 238000004458 analytical method Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 22
- 241000196324 Embryophyta Species 0.000 description 17
- 244000068988 Glycine max Species 0.000 description 5
- 235000010469 Glycine max Nutrition 0.000 description 4
- 239000005431 greenhouse gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001819 mass spectrum Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010206 sensitivity analysis Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the trace gas stable isotope analysis technical field, in particular to a sample collecting device for measuring the <15/14>N isotope abundance of N2 discharged by a plant. The gas collecting device comprises a part which has a variable shape and volume during the process of gas pumping, and a gas collector; the plant to be tested is arranged in the closed part; a gas sampling port is arranged on the part, and the gas collector is hermetically connected with the part through the gas sampling port. The collecting device provided by the utility model can be used to quickly and correctly measure the <15/14> isotope abundance of N2 discharged by the plant system.
Description
Technical field
The utility model relates to the stable isotope analysis technical field of trace gas, specifically is a kind of mensuration plant discharging N
2O's
15/14The sample collecting apparatus of N isotopic abundance.
Background technology
The main cause of global warming is that atmosphere percent of greenhouse gases concentration rises.N
2O comes tertiary important greenhouse gases, and it is CO that its unimolecule heats potentiality
2296 times, the contribution of global warming is accounted for whole greenhouse gases total contribution 7%, it also participates in destroying stratospheric ozone and strengthens UV radiation to the face of land.N in the present atmosphere
2The concentration of O is about 310ppbv, and annual growth is 0.25%, this means present N
2The increase of O concentration will produce long-range influence to Global climate change.
To soil-atmosphere interface N
2The closed enclosure law technology is generally adopted in the research of O exchange, and the gaseous sample that collects calculates N by the gas chromatographic technique analysis
2The O emission flux.At present, measure the N of plant
2The O drainage rate mainly adopts closed separation method, mainly is the immutable glass box of shape, and plant is contained in wherein, regathers gaseous sample in it.
Stable isotope ratios mass-spectrometric technique (IRMS) is a kind of "dead", high-sensitivity analysis method, can be used to analyze N
2The δ value of O, promptly
15N/
14N.N
2The δ value of O can be used for studying N
2O emission source or production process.
But, when utilizing closed separation method to collect gaseous sample to be determined, owing to contained a certain amount of N in the background air in the gaseous sample of gathering
2O, and from the N of plant or soil
2O may only account for N in the sample
2The very fraction of O, therefore, the δ value that this class sample is measured by isotopic ratio mass spectrum (IRMS) is not the N that determined object-plant emitted just
2The δ value of O, thus a kind of new method must be sought, to eliminate original N in the air
2O is to the influence of measurement result.
Simultaneously, owing to measuring plant discharging N with stable isotope ratio mass spectrometer
2O's
15/14During the N isotopic abundance, generally need the N in the gaseous sample
2More than the O concentration 300ppm, more than the sample volume 100ml.And the N of plant
2The O discharge capacity is often very little, thereby, usually can't measure the sample that is obtained with the stable isotope ratios mass spectrometer.
Because above-mentioned reason can not be measured plant origin N with current techniques
2The δ value of O.
The utility model content
The object of the present invention is to provide a kind of all variable mensuration plant discharging N of shape and volume that utilizes
2O's
15/14The sample collecting apparatus of N isotopic abundance.
For achieving the above object, the technical scheme that the utility model adopted is:
Harvester: be included in the parts 1 and the gas collecting device 2 of shape in the pumping process, variable volume, treat that measuring plants 3 is placed in the airtight parts 1; Have gas sampling mouth 3 on parts 1, gas collecting device 2 is tightly connected by gas sampling mouth 3 and parts 1.
Described parts 1 are provided with seal 4, treat that measuring plants 3 is placed in the parts 1 by seal 4, and seal 4 seals at the gas collecting state.Described parts 1 can be printing opacity, air-locked polybag or teflon bag.Described gas collecting device 2 can be impermeability needle tubing or gas collecting bag.
The advantage that the utility model had:
1. the utility model utilizes all variable transparent plastic bag of shape and volume as sampling apparatus, and volume is dwindled as far as possible, that is to say, even the N that newly emits
2O amount is smaller, its concentration height of also can trying one's best.In the past at the N of plant
2Can not measure its N under the low situation of O discharge capacity
2The δ value of O adopts method and apparatus of the present invention, then can measure.
2. the utility model gas collecting device is parts and the gas collecting device that is included in shape in the pumping process, variable volume, treats that measuring plants is placed in the airtight parts; Have the gas sampling mouth on parts, the gas collecting device is tightly connected by gas sampling mouth and parts.Adopt harvester of the present invention can measure plant botanical system discharging N convenient, exactly
2O's
15/14N stable isotope abundance.
Description of drawings
Fig. 1 does not replace the preceding synoptic diagram of artificial air for the utility model determinator.
Fig. 2 does not replace synoptic diagram behind the artificial air for the utility model determinator.
Embodiment:
Be included in the parts 1 and the gas collecting device 2 of shape in the pumping process, variable volume, treat that measuring plants 3 is placed in the airtight parts 1; Have gas sampling mouth 3 on parts 1, gas collecting device 2 is tightly connected by gas sampling mouth 3 and parts 1.Described parts 1 are provided with seal 4, treat that measuring plants 3 is placed in the parts 1 by seal 4, and seal 4 seals at the gas collecting state.Described parts 1 can be transparent polybag or teflon bag.Described gas collecting device 2 can be needle tubing.
Choosing soybean is research object, measures the N of soybean discharging season at soybeans they grow
2The δ of O
15The N value.Will be in the season of growth of soybean, the fresh sample of gathering soybean plant strain respectively is as plant sample to be determined, puts into the polybag 1 of determinator by seal 4, then with seal 4 in the sealing of gas collecting state, with not containing N
2The O artificial air replaces 3 times by the sample collecting mouth of offering on the determinator, pack into syringe extracting gases sample from thieff hatch after 40-60 minute in the 200-500ml sampler bag closing the sample collecting mouth, treat that the isotopic ratio mass spectrum (IRMS) analysis is with the δ that measures in the gaseous sample
15The N value.
Claims (4)
1. measure plant discharging N for one kind
2O's
15/14The sample collecting apparatus of N isotopic abundance is characterized in that: be included in the parts (1) and the gas collecting device (2) of shape in the pumping process, variable volume, treat that measuring plants (3) is placed in the airtight parts (1); Have gas sampling mouth (3) on parts (1), gas collecting device (2) is tightly connected by gas sampling mouth (3) and parts (1).
2. by the described mensuration plant discharging of claim 1 N
2O's
15/14The sample collecting apparatus of N isotopic abundance is characterized in that: described parts (1) are provided with seal (4), treat that measuring plants (3) is placed in the parts (1) by seal (4), and seal (4) seals at the gas collecting state.
3. by the described mensuration plant discharging of claim 1 N
2O's
15/14The sample collecting apparatus of N isotopic abundance is characterized in that: described parts (1) can be printing opacity, air-locked polybag or teflon bag.
4. by the described mensuration plant discharging of claim 1 N
2O's
15/14The sample collecting apparatus of N isotopic abundance is characterized in that: described gas collecting device (2) can be impermeability needle tubing or gas collecting bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201852057U CN201145651Y (en) | 2007-12-26 | 2007-12-26 | Sampling apparatus for measuring plant discharged N2O and 15/14 N isotopic abundance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201852057U CN201145651Y (en) | 2007-12-26 | 2007-12-26 | Sampling apparatus for measuring plant discharged N2O and 15/14 N isotopic abundance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201145651Y true CN201145651Y (en) | 2008-11-05 |
Family
ID=40082534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201852057U Expired - Fee Related CN201145651Y (en) | 2007-12-26 | 2007-12-26 | Sampling apparatus for measuring plant discharged N2O and 15/14 N isotopic abundance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201145651Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913956A (en) * | 2015-06-10 | 2015-09-16 | 广西大学 | Device for collecting carbon isotopes of aldehyde ketone compound discharged by plants |
| CN106248444A (en) * | 2016-08-26 | 2016-12-21 | 吕文强 | Soil respiration CO2the collection of gas and carbon stable isotope value method of testing thereof |
-
2007
- 2007-12-26 CN CNU2007201852057U patent/CN201145651Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913956A (en) * | 2015-06-10 | 2015-09-16 | 广西大学 | Device for collecting carbon isotopes of aldehyde ketone compound discharged by plants |
| CN106248444A (en) * | 2016-08-26 | 2016-12-21 | 吕文强 | Soil respiration CO2the collection of gas and carbon stable isotope value method of testing thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20100126 |