WO2004065949A1 - X-ray fluorescence flux composition - Google Patents
X-ray fluorescence flux composition Download PDFInfo
- Publication number
- WO2004065949A1 WO2004065949A1 PCT/AU2004/000001 AU2004000001W WO2004065949A1 WO 2004065949 A1 WO2004065949 A1 WO 2004065949A1 AU 2004000001 W AU2004000001 W AU 2004000001W WO 2004065949 A1 WO2004065949 A1 WO 2004065949A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- composition
- proportion
- flux
- weight
- flux composition
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/223—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/07—Investigating materials by wave or particle radiation secondary emission
- G01N2223/076—X-ray fluorescence
Definitions
- This invention relates to the analysis of materials, and in particular to a flux composition for x-ray fluorescence spectroscopy analysis of ore samples.
- Background X-ray flux is produced by fusing at high temperatures ( approx. 1100 degrees C. ) in platinum or platinum alloy crucibles, chemicals containing lithium and boron or chemicals containing lithium or boron. The molten material is then cooled and reduced in size to a powder or coarse material. The resultant material is x-ray flux and is usually represented or specified in the final commercial product as ratios of lithium tetraborate to lithium metaborate.
- the x-ray flux is then mixed with samples to be analyzed, e.g. iron ore, and melted in a platinum or platinum alloy mold.
- samples to be analyzed e.g. iron ore
- the mixture is melted in a platinum or platinum alloy crucible and poured into a platinum or platinum alloy mold.
- the mold is cooled and the result is a glass like disc which is then placed into an x-ray fluorescence spectrograph machine for analysis.
- lanthanides in the yttrium group of elements which comprise gadolinium, terbium, dysprosium, holmium, erbium, thulium,- ytterbium, and lutetium, have hitherto unsuspected properties such that when fused together with the lithium and boron compounds to form x-ray flux they are useful as an internal standard in x-ray fluorescence analysis.
- a flux composition having ionic moieties selected from a lanthanide. Best Mode(s) for Carrying Out the Invention
- the embodiment involves the addition of terbium or terbium containing compounds plus silicon dioxide to the lithium and boron containing chemicals before fusing to make the flux.
- the addition of terbium or terbium compounds is added such that the percentage of terhium in the finished-flux. is from 0.5 to 15% by weight.
- Silicon dioxide is also added to the lithium, boron and terbium containing compounds before fusing to give a percentage of silicon dioxide in the finished flux of 2 to 7% by weight.
- a batch of flux is made up by adding to 100 grams of lithium tetraborate and lithium metaborate in the proportion of 1.2 parts to 2.2 parts respectively or a mixture of chemicals which when fused gives the equivalent of fusing the directly aforementioned mixture, 13.095 grams of terbium oxide (Tb 4 O 7 ) and 5.95 grams of silicon dioxide (SiO 2 ). These ingredients are combined and mixed, and placed in a platinum or platinum alloy crucible and are fused at 1100 degrees C. The fused mix, which forms a liquid glass, is allowed to cool and reduced in size to a coarse material or a powder to produce the finished flux composition.
- Tb 4 O 7 terbium oxide
- SiO 2 silicon dioxide
- a known quantity of iron ore is combined with a known quantity of the finished flux composition, such that the amount of ore relative to the amount of elemental terbium present in the flux composition is known.
- 1 gram of ore is added to 7 grams of flux, and melted in a platinum or platinum alloy mold.
- the ore and flux is melted in a platinum or platinum alloy crucible and poured into a mold. The mold is cooled, the contents forming a glass-like disc which is then placed into an x-ray fluorescence spectrograph machine for analysis.
- the amount of iron present is determined by analysis of the spectral lines and comparison with the spectral lines of terbium. It has been found that terbium has an x-ray fluorescence wavelength close to iron, such that the matrix effect or interference effect is effectively the same as for iron. Further, the terbium and iron spectral lines are similarly affected by other elements usually present in iron ore samples. Consequently, by examining the ratios of the intensity of the wavelength of terbium to iron, the amount of iron in the disc and subsequently in the sample, can be easily and accurately determined mathematically. Furthermore, the flux composition provides a failsafe analytical technique, in that should the spectral lines for terbium not be present, the analysis can be considered to have failed.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Luminescent Compositions (AREA)
Abstract
In the x-ray analysis of minerals, ores and other materials, chemicals containing lithium and boron are melted together at high temperatures to produce lithium borate compounds which are then cooled and reduced in size to a powder or coarse material. Such material is known as x-ray flux and is usually represented or specified in the final commercial product as ratios of lithium tetraborate to lithium metaborate. The x-ray is melted with materials to be analyzed and cast into discs which are then analyzed by an x-ray fluorescence spectrograph. In this invention, a lanthanide of the yttrium group has been added and melted with the chemicals containing lithium and boron, such as to function as an internal standard, when the fluxes are mixed and melted with samples to be analyzed.
Description
Specification
The following statement is a full description of this invention, including the best method of performing it known to me:
Title X-RAY FLUORESCENCE FLUX COMPOSITION
Field of the Invention
This invention relates to the analysis of materials, and in particular to a flux composition for x-ray fluorescence spectroscopy analysis of ore samples. Description
Throughout the description, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not to the exclusion of any other integer or group of integers.
Background X-ray flux is produced by fusing at high temperatures ( approx. 1100 degrees C. ) in platinum or platinum alloy crucibles, chemicals containing lithium and boron or chemicals containing lithium or boron. The molten material is then cooled and reduced in size to a powder or coarse material. The resultant material is x-ray flux and is usually represented or specified in the final commercial product as ratios of lithium tetraborate to lithium metaborate.
The x-ray flux is then mixed with samples to be analyzed, e.g. iron ore, and melted in a platinum or platinum alloy mold. Alternatively, the mixture is melted in a platinum or platinum alloy crucible and poured into a platinum or platinum alloy mold.The mold is cooled and the result is a glass like disc which is then placed into an x-ray fluorescence spectrograph machine for analysis.
Previous difficulties
Difficulties exist with the calibration of the x-ray fluorescence spectrograph such that the concentration of target analyte in the disc can be determined with confidence. Hitherto, attempts have been made to add cobalt to the flux, to provide what is referred to as an internal standard, however this had a big disadvantage in the case of iron ore, as cobalt itself is present in iron ore and can therefore cause significant errors. Furthermore, cobalt reacts with platinum to form an alloy and as all the equipment used in the x-ray analytical fusion process
consists of platinum or platinum alloys it is not practical. Due to these problems, the use of cobalt in such application has been abandoned.
Inventive Idea
The inventors have found that lanthanides in the yttrium group of elements which comprise gadolinium, terbium, dysprosium, holmium, erbium, thulium,- ytterbium, and lutetium, have hitherto unsuspected properties such that when fused together with the lithium and boron compounds to form x-ray flux they are useful as an internal standard in x-ray fluorescence analysis. Thus, in accordance with one aspect of the invention there is provided a flux composition having ionic moieties selected from a lanthanide. Best Mode(s) for Carrying Out the Invention
The embodiment involves the addition of terbium or terbium containing compounds plus silicon dioxide to the lithium and boron containing chemicals before fusing to make the flux. The addition of terbium or terbium compounds is added such that the percentage of terhium in the finished-flux. is from 0.5 to 15% by weight.
Silicon dioxide is also added to the lithium, boron and terbium containing compounds before fusing to give a percentage of silicon dioxide in the finished flux of 2 to 7% by weight.
A batch of flux is made up by adding to 100 grams of lithium tetraborate and lithium metaborate in the proportion of 1.2 parts to 2.2 parts respectively or a mixture of chemicals which when fused gives the equivalent of fusing the directly aforementioned mixture, 13.095 grams of terbium oxide (Tb4O7) and 5.95 grams of silicon dioxide (SiO2). These ingredients are combined and mixed, and placed in a platinum or platinum alloy crucible and are fused at 1100 degrees C. The fused mix, which forms a liquid glass, is allowed to cool and reduced in size to a coarse material or a powder to produce the finished flux composition.
In use, a known quantity of iron ore is combined with a known quantity of the finished flux composition, such that the amount of ore relative to the amount of elemental terbium present in the flux composition is known. Typically from 1:4 to 1:20 by weight ratio ore to flux is usually satisfactory, depending upon the ore type and grade. For typical iron ore deposits which are usually of a reasonably high grade, 1 gram of ore is added to 7 grams of flux, and melted in a platinum or platinum alloy mold. Alternatively, the ore and flux is melted in a platinum or platinum alloy crucible and poured into a mold. The mold is cooled, the contents forming a glass-like disc which is then placed into an x-ray fluorescence spectrograph machine for analysis. The amount of iron present is determined by analysis of the spectral lines and comparison with the spectral lines of terbium. It
has been found that terbium has an x-ray fluorescence wavelength close to iron, such that the matrix effect or interference effect is effectively the same as for iron. Further, the terbium and iron spectral lines are similarly affected by other elements usually present in iron ore samples. Consequently, by examining the ratios of the intensity of the wavelength of terbium to iron, the amount of iron in the disc and subsequently in the sample, can be easily and accurately determined mathematically. Furthermore, the flux composition provides a failsafe analytical technique, in that should the spectral lines for terbium not be present, the analysis can be considered to have failed.
Claims
Claims
The claims defining the invention are as follows:
1. A flux composition comprising lithium values and boron values as a borate of lithium, and a compound having ionic moieties selected from a lanthaήide of the yttrium group of elements, the ionic moieties being present in proportion of at least 0.05% by weight of boron values in said composition.
2. The flux composition of claim 1 where the ionic moieties are present in proportion of at least 1.0% by weight of boron values in the said composition.
3. The flux composition of claim 1 where the ionic moieties are present in * proportion of at least 2.0% by weight of boron values in the said composition. 4. The flux composition of claim 1 where the ionic moieties are present. in proportion of at least 4.0% by weight of boron values in the said composition.
5. The flux composition of claim 1 where the ionic moieties are present in proportion of at least 6.0% by weight of boron values in the said composition.
6. The flux composition of claim 1 where the ionic moieties are present in proportion of at least 8.0% by weight of boron values in the said composition.
7. The flux composition of claim 1 where the ionic moieties are present in proportion of at least 10.0% by weight of boron values in the said composition.
8. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 100.0% by weight of boron values in the said composition. 9. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 90.0% by weight of boron values in the said composition.
10. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 80.0% by weight of boron values in the said composition.
11. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 70.0% by weight of boron values in the said composition.
12. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 60.0% by weight of boron values in the said composition. 13. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 50.0% by weight of boron values in the said composition.
14. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 40.0% by weight of boron values in the said composition.
15. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 30.0% by weight of boron values in the said composition.
16. The flux composition of claim 1 where the ionic moieties are present in proportion of up to 20.0% by weight of boron values in the said composition. .
17. The flux composition of claim 1 where the ionic moieties are present in proportion of between 45% to 50% by weight of boron values in the said composition. 18. The flux composition of claim 1 where the ionic moieties are present in proportion of about 48.2% by weight of boron values in the said composition.
19. The flux composition of claim 1 where the ionic moieties comprise terbium.
20. The flux composition of claim 1 where the ionic moieties alternatively comprise thulium.
21. The flux composition of any one of the claims 1 to 20 where silicon dioxide is added in proportion of at least 1 % by weight of the said composition.
22. The flux composition of any one of the claims 1 to 21 where silicon dioxide is added in proportion of from 2% to 7% by weight of the said composition. 23. The flux composition of any one of the claims 1 to 22 where the borate of lithium may be entirely lithium tetraborate.
25. The flux composition of any one of the claims 1 to 22 where the borate of lithium may be entirely lithium meta-borate. 26. The flux composition of any one of the claims 1 to 22 where the borate of lithium comprises a mixture of lithium tetraborate and lithium meta-borate in a range of proportions from 1 : 10 to 10: 1.
27. The flux composition of any one of the claims 1 to 22 where the borate of lithium comprises a mixture of lithium tetraborate and lithium meta-borate in the proportion of 1.2:2.2 respectively.
28. The flux composition of any one of the claims 1 to 27 where the lithium may be provided from any lithium containing compound and the boron may be provided from any boron containing compound.
29. The flux composition of claim 1 comprises finely divided particles of a fusion of compounds of any one of the claims 1 to 28. 30. A known quantity of the flux compositions of any one of the claims 1 to 29 is mixed with a predetermined sample of ore, fusing the said ore and flux composition to form a fusion thereof, and performing x-ray fluorescence spectroscopy on the said fusion. 31. The said ore and said flux composition of claim 30 are mixed in weight proportion from 1 :1 to 1:40.
32. The said ore and said flux composition of any one of the claims 1 to 30 are mixed in weight proportion between 4% to 25% of the said ore to said flux respectively, the limiting factors as to proportions being the amount of sample that is soluble in the molten flux, and the minimum amount of target analyte necessary for comparison against the spectrum for the ionic moieties in the flux. 33. For iron determination in iron ore the said ionic moieties of claim 1 comprise terbium.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2513566A CA2513566C (en) | 2003-01-21 | 2004-01-02 | X-ray fluorescence flux composition |
| AU2004206033A AU2004206033B2 (en) | 2003-01-21 | 2004-01-02 | X-ray fluorescence flux composition |
| EP04700030A EP1585980A4 (en) | 2003-01-21 | 2004-01-02 | X-ray fluorescence flux composition |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003900222A AU2003900222A0 (en) | 2003-01-21 | 2003-01-21 | Flux composition |
| AU2003900222 | 2003-01-21 | ||
| AU2003903310 | 2003-06-30 | ||
| AU2003903310A AU2003903310A0 (en) | 2003-06-30 | 2003-06-30 | Flux composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004065949A1 true WO2004065949A1 (en) | 2004-08-05 |
Family
ID=32772515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU2004/000001 Ceased WO2004065949A1 (en) | 2003-01-21 | 2004-01-02 | X-ray fluorescence flux composition |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1585980A4 (en) |
| CA (1) | CA2513566C (en) |
| WO (1) | WO2004065949A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006200656B1 (en) * | 2006-01-05 | 2006-07-13 | X-Ray Flux Pty Ltd | Nickel flux composition |
| WO2007076562A1 (en) * | 2006-01-05 | 2007-07-12 | X-Ray Flux Pty Ltd | Nickel flux composition |
| AU2007202706B2 (en) * | 2007-05-04 | 2009-02-05 | X-Ray Flux Pty Ltd | X-ray flux composition mixture |
| AU2010249195B1 (en) * | 2010-12-07 | 2011-06-30 | X-Ray Flux Pty Ltd | Lithium X-Ray flux composition |
| AU2007216909B2 (en) * | 2006-10-17 | 2011-10-06 | X-Ray Flux Pty Ltd | Copper X-ray flux composition |
| CN102507287A (en) * | 2011-11-21 | 2012-06-20 | 山东省地质科学实验研究院 | Sample preparation flux for fluorite sample in X ray fluorescence spectrum analysis |
| CN102901742A (en) * | 2011-07-26 | 2013-01-30 | 唐山建龙实业有限公司 | Method for determining Ni, Cr and Cu in iron ore through X-ray fluorescence spectrum analysis |
| CN103278520A (en) * | 2013-06-11 | 2013-09-04 | 鞍钢股份有限公司 | X-ray fluorescence spectrum analysis method of siliceous slag conglomeration agent |
| CN104749008A (en) * | 2015-03-24 | 2015-07-01 | 万宝矿产有限公司 | Sample preparation method for mixed high-copper low-cobalt powdery alloys and high-cobalt low-copper granular alloys |
| JP2016504967A (en) * | 2013-01-03 | 2016-02-18 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | Method of manufacturing a filter for filtering nanoparticles, the resulting filter, and related methods for collection and quantitative analysis of nanoparticles |
| WO2023231385A1 (en) * | 2022-06-01 | 2023-12-07 | 苏州佳谱科技有限公司 | Enrichment detection method and apparatus for trace heavy metal elements in liquid |
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| JPH09257673A (en) * | 1996-03-26 | 1997-10-03 | Fuji Electric Co Ltd | Analysis method of vanadium oxide ceramics |
| WO2000044682A1 (en) * | 1999-02-01 | 2000-08-03 | The Curators Of The University Of Missouri | Biodegradable glass compositions and methods for radiation therapy |
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| DE2500910A1 (en) * | 1975-01-11 | 1976-12-09 | Siemens Ag | Luminescent terbium-activated lithium beryllium borate glass - avoiding discoloration on long exposure to UV X-rays or electrons |
| US4889707A (en) * | 1988-01-29 | 1989-12-26 | The Curators Of The University Of Missouri | Composition and method for radiation synovectomy of arthritic joints |
| GB8811411D0 (en) * | 1988-05-13 | 1988-06-15 | Unilever Plc | Silicate binders |
| US6358531B1 (en) * | 1999-02-01 | 2002-03-19 | The Curators Of The University Of Missouri | Method for preparing porous shells or gels from glass particles |
-
2004
- 2004-01-02 CA CA2513566A patent/CA2513566C/en not_active Expired - Lifetime
- 2004-01-02 WO PCT/AU2004/000001 patent/WO2004065949A1/en not_active Ceased
- 2004-01-02 EP EP04700030A patent/EP1585980A4/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09257673A (en) * | 1996-03-26 | 1997-10-03 | Fuji Electric Co Ltd | Analysis method of vanadium oxide ceramics |
| WO2000044682A1 (en) * | 1999-02-01 | 2000-08-03 | The Curators Of The University Of Missouri | Biodegradable glass compositions and methods for radiation therapy |
Non-Patent Citations (10)
| Title |
|---|
| "High Purity Molten Fluxes", SOCACHIM FINE CHEMICALS CATALOGUE 2002, 23 February 2004 (2004-02-23), BRUSSELS, XP008097580, Retrieved from the Internet <URL:http://www.socachim.com/images/Catalogue%20SOCA%20Anglais%202002flux.pdf> [retrieved on 20040223] * |
| DATABASE CA LE: "X-Ray fluorescence spectroscopic determination of 15 rare earth elements in rare earth oxide mixtures", XP008097669, Database accession no. 1992:75156 * |
| DATABASE CA OHKAWATU ET AL.: "X-Ray fluorescence analysis of optical glass", XP008097668, Database accession no. 1985:582500 * |
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| EDDY ET AL.: "A flux for fusion of samples in analysis by X-Ray fluorescence spectroscopy", X-RAY SPECTROSCOPY, vol. 17, 1988, pages 17 - 18, XP009101709 * |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006200656B1 (en) * | 2006-01-05 | 2006-07-13 | X-Ray Flux Pty Ltd | Nickel flux composition |
| WO2007076562A1 (en) * | 2006-01-05 | 2007-07-12 | X-Ray Flux Pty Ltd | Nickel flux composition |
| AU2007216909B2 (en) * | 2006-10-17 | 2011-10-06 | X-Ray Flux Pty Ltd | Copper X-ray flux composition |
| AU2007202706B2 (en) * | 2007-05-04 | 2009-02-05 | X-Ray Flux Pty Ltd | X-ray flux composition mixture |
| AU2010249195B1 (en) * | 2010-12-07 | 2011-06-30 | X-Ray Flux Pty Ltd | Lithium X-Ray flux composition |
| CN102901742A (en) * | 2011-07-26 | 2013-01-30 | 唐山建龙实业有限公司 | Method for determining Ni, Cr and Cu in iron ore through X-ray fluorescence spectrum analysis |
| CN102507287A (en) * | 2011-11-21 | 2012-06-20 | 山东省地质科学实验研究院 | Sample preparation flux for fluorite sample in X ray fluorescence spectrum analysis |
| JP2016504967A (en) * | 2013-01-03 | 2016-02-18 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | Method of manufacturing a filter for filtering nanoparticles, the resulting filter, and related methods for collection and quantitative analysis of nanoparticles |
| CN103278520A (en) * | 2013-06-11 | 2013-09-04 | 鞍钢股份有限公司 | X-ray fluorescence spectrum analysis method of siliceous slag conglomeration agent |
| CN104749008A (en) * | 2015-03-24 | 2015-07-01 | 万宝矿产有限公司 | Sample preparation method for mixed high-copper low-cobalt powdery alloys and high-cobalt low-copper granular alloys |
| WO2023231385A1 (en) * | 2022-06-01 | 2023-12-07 | 苏州佳谱科技有限公司 | Enrichment detection method and apparatus for trace heavy metal elements in liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2513566A1 (en) | 2004-08-05 |
| CA2513566C (en) | 2012-04-24 |
| EP1585980A4 (en) | 2008-07-30 |
| EP1585980A1 (en) | 2005-10-19 |
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