CN101055253A - Method for determining minim Hg of aluminium ingot - Google Patents
Method for determining minim Hg of aluminium ingot Download PDFInfo
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- CN101055253A CN101055253A CN 200710099814 CN200710099814A CN101055253A CN 101055253 A CN101055253 A CN 101055253A CN 200710099814 CN200710099814 CN 200710099814 CN 200710099814 A CN200710099814 A CN 200710099814A CN 101055253 A CN101055253 A CN 101055253A
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- mercury
- sample
- aluminium ingot
- fluorescence spectrometer
- solution
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 46
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000004411 aluminium Substances 0.000 title claims description 40
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 28
- 150000004678 hydrides Chemical class 0.000 claims abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 34
- 238000012360 testing method Methods 0.000 claims description 26
- 239000000243 solution Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 13
- 229910052700 potassium Inorganic materials 0.000 claims description 13
- 239000011591 potassium Substances 0.000 claims description 13
- 238000005303 weighing Methods 0.000 claims description 12
- 239000012159 carrier gas Substances 0.000 claims description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 238000003556 assay Methods 0.000 claims description 9
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000006722 reduction reaction Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 8
- 239000003638 chemical reducing agent Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 239000012488 sample solution Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 239000012086 standard solution Substances 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a measuring method for micro mercury in aluminum ingot, which relates to a analysis method for chemical ingredient in aluminum ingot, especially to a measuring method for micro mercury in aluminum ingot. The method is characterized in that: sample is dissolved to inhibit mercury volatilization, reducing agent is added into the solution to enrich mercury of aluminum by hydride generation, after forming mercury steam, atom fluorescence spectrometer is used to obtain measuring consequence. The method can accurately and fast measure mercury content in aluminum ingot, and is adapted for analysis of micro mercury for aluminum ingot manufacturer.
Description
Technical field
The assay method of Trace Mercury in a kind of aluminium ingot relates to the analytical approach of chemical analysis in a kind of metal aluminium ingot, the assay method of Trace Mercury in the special aluminium ingot.
Background technology
In international standard ISO/T115, clearly stipulate, be used for aluminium product Hg+Cd+Pb＜0.0095% relevant such as medicine, food with environment and human health.Further opening along with China joined WTO and market, the aluminium industrial market of China is circulated fully with world market, China is that the world produces aluminium big country, particularly in recent years, increase along with outlet aluminium ingot amount, the foreign trader makes demands more and more to the detection of mercury content in the aluminium product, though, at present also the content of mercury is not carried out requirement in China's aluminium ingot product technology standard, but in line with international standards as early as possible, reduce technology barriers, fast, measure the amount of Trace Mercury element in the aluminium ingot accurately, become the major issue that current light metal product analysis worker faces, the trace harmful elements in the aluminium ingot is generally brought into by the starting material and the smelting process of aluminium ingot production.Mercury is a kind of harmful element wherein, and The World Health Organization (WHO) has classified mercury as the environmental contaminants of overriding concern.Because the device of now a lot of household electrical appliance and splendid attire food is to do raw material production by aluminium, and food is in a single day mercury-contaminated, uses any processing mode all to be difficult to remove.So the content of mercury will cause enough attention in the aluminium.
And present analytical approach, as use conventional spectrophotometric method, cold atomic absorption spectrometry is measured little, the Trace Hg insufficient sensitivity in the aluminium ingot, precision is on the low side, the mensuration lower limit of cold atomic absorption spectrometry is 0.000X%, can't measure for the mercury of content in the aluminium ingot between 10-5%～10-7%.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, sensitivity and accuracy that a kind of effective raising measures is provided, satisfies both at home and abroad quality requirements to the aluminium ingot product, improves analysis efficiency, saves the assay method of Trace Mercury in the aluminium ingot of analysis cost.
Method of the present invention is achieved through the following technical solutions.
The assay method of Trace Mercury in a kind of aluminium ingot, its spy is that its test process is with the molten sample of sample, suppresses the volatilization of mercury, and the adding reductive agent utilizes hydride to take place the Trace Mercury enrichment in the aluminium ingot, after forming mercuryvapour, introduce and measure, draw test result with atomic fluorescence spectrometer.
The assay method of Trace Mercury in a kind of aluminium ingot of the present invention, its spy is that its test process may further comprise the steps:
(1) course of dissolution of sample is: will take by weighing sample 2.000g, place the 400mL beaker, add 45ml chloroazotic acid (1+1) and cover surface plate, placement is spent the night, and the beaker that will fill sample is then put into 90 ℃ water-bath, and maintenance 20min, take out, be cooled to room temperature, solution is moved in the 100mL volumetric flask, be diluted to scale with deionized water, shake up;
(2) the mensuration process of sample is: sample that above dissolving is good and the mixed solution that contains 5g/L NaOH-6g/L potassium borohydride are together, hydrochloric acid with 5% is that current-carrying is introduced the reactive system in the atomic fluorescence spectrometer, with the argon gas carrier gas with mercuryvapour that reduction reaction produced, introduce in the atomic fluorescence spectrometer, under selected Instrument measuring condition, according to the relation that the concentration of fluorescence intensity and mercury is directly proportional, the Trace Mercury in the quantitative measurement aluminium ingot product.
Method of the present invention, with the sample aqua regia dissolution, for preventing the volatilization of mercury in molten sample process, temperature, time to dissolving stipulate, adding certain density reductive agent at reactive system makes mercury ion be reduced to mercury vapour, do carrier gas with argon gas and be introduced into the atomic fluorescence spectrometer measuring system, measure.Use the present invention can determine the content of Trace Mercury in the aluminium ingot accurately and rapidly, be applicable to that all aluminium ingot manufacturers in the whole nation carry out the analysis of Trace Mercury, to produce the aluminium ingot product of the quality requirements that is up to state standards.
Embodiment
The assay method of Trace Mercury in a kind of aluminium ingot, its test process are with the molten sample of sample, suppress the volatilization of mercury, and the adding reductive agent utilizes hydride to take place the Trace Mercury enrichment in the aluminium ingot, after forming mercuryvapour, introduce and measure, draw test result with atomic fluorescence spectrometer; May further comprise the steps: the course of dissolution of (1) sample is: will take by weighing sample 2.000g, place the 400mL beaker, add 45ml chloroazotic acid (1+1) and cover surface plate, placement is spent the night, and the beaker that will fill sample is then put into 90 ℃ water-bath, and maintenance 20min, take out, be cooled to room temperature, solution is moved in the 100mL volumetric flask, be diluted to scale with deionized water, shake up; (2) the mensuration process of sample is: sample that above dissolving is good and the mixed solution that contains 5g/L NaOH-6g/L potassium borohydride are together, hydrochloric acid with 5% is that current-carrying is introduced the reactive system in the atomic fluorescence spectrometer, with the argon gas carrier gas with mercuryvapour that reduction reaction produced, introduce in the atomic fluorescence spectrometer, under selected Instrument measuring condition, according to the relation that the concentration of fluorescence intensity and mercury is directly proportional, the Trace Mercury in the quantitative measurement aluminium ingot product.
In the experiment of the inventive method, agents useful for same has: 1, Hg standard solution (1.0mg/mL), and the time spent is diluted to 1 μ g/L; 2, KBH
4Solution 6g/L; 3, NaOH solution 5g/L; 4, HCL solution 5%; 5, chloroazotic acid (1+1), 6, argon gas (99.99%); Test water is quartzy sub-boiling distillation water, and the testing tool of use is an atomic fluorescence spectrometer.
Sample should be processed into the bits shape that thickness is not more than 1mm; The amount of taking by weighing of sample is 2.000g.
Use the condition determination of atomic fluorescence spectrometer to be: lamp current 40mA, negative high voltage 290V, observed altitude 10mm, 200 ℃ of atomization temperatures, carrier gas flux 400mL/min, shield gas flow amount 800mL/min.The atomic fluorescence spectrometer sensitivity difference of different model, instrument test condition are slightly different.
Embodiment 1
Get the aluminium ingot sample of production, be processed into the chip that thickness is not more than 1mm.
Take by weighing sample 2.000g, place the 400mL beaker, add 45ml chloroazotic acid (1+1) and cover surface plate, placement is spent the night, and the beaker that will fill sample is then put into 90 ℃ water-bath, and maintenance 20min, take out, be cooled to room temperature, solution is moved in the 100mL volumetric flask, be diluted with water to scale, shake up.Do blank test in company with test.
Other takes by weighing 1.0g NaOH in the 300mL beaker that fills little water, after the dissolving, adds the stirring of 1.2g potassium borohydride and makes its dissolving, is diluted to 200mL with deionized water then.The addition sequence of reagent can not be put upside down.
Other pipettes 25mL top grade pure hydrochloric acid in the 500mL volumetric flask, is diluted to scale with deionized water, and mixing is used as current-carrying.
Sample solution that above dissolving is good and the above solution of potassium borohydride of preparing, hydrochloric acid with 5% is that current-carrying is introduced the reactive system in the atomic fluorescence spectrometer, the mercuryvapour that is produced is introduced in the atomic fluorescence spectrometer with carrier gas, under selected Instrument measuring condition, measures.
The mean value of mercury content is 0.0315 μ g/Kg (3.15 * 10 in 11 working samples
-7%), standard deviation 0.00693, coefficient of alteration 22%.
Embodiment 2
Get the aluminium ingot sample that domestic certain factory produces, be processed into the chip that thickness is not more than 1mm.
Take by weighing totally 5 parts of sample 2.000g, place the 400mL beaker respectively, add 45ml chloroazotic acid (1+1) and cover surface plate, placement is spent the night.Constant volume in a directly immigration 100mL volumetric flask is put into 90 ℃ of water-baths, is placed 10min, 20min, 30min, 40min respectively for all the other 4 parts.
Other takes by weighing 1.0g NaOH in the 300mL beaker that fills little water, after the dissolving, adds the stirring of 1.2g potassium borohydride and makes its dissolving, is diluted to 200mL with deionized water then.The addition sequence of reagent can not be put upside down.
Other pipettes 25mL top grade pure hydrochloric acid in the 500mL volumetric flask, is diluted to scale with deionized water, and mixing is used as current-carrying.
Sample solution that above dissolving is good and the above solution of potassium borohydride of preparing, hydrochloric acid with 5% is that current-carrying is introduced the reactive system in the atomic fluorescence spectrometer, the mercuryvapour that is produced is introduced in the atomic fluorescence spectrometer with carrier gas, under selected Instrument measuring condition, measure, its test findings sees Table 1.
Table 1 test heat time heating time (fluorescence intensity)
| Content of the test | Not water-bath | Water-bath 10min | Water-bath 20min | Water-bath 30min | Water-bath 40min |
| Fluorescence intensity | 445.34 | 449.10 | 467.84 | 445.94 | 350.43 |
As can be seen from Table 1, because of sample size is low, the amount of taking by weighing is bigger, does not heat if sample only soaks,, dissolving is incomplete, and fluorescent value is just on the low side, but the time of water-bath heating can not be long, otherwise mercury has volatilization loss, so the present invention adopts water-bath 20min after the sample soaked overnight.
Embodiment 3
Get the aluminium ingot sample that domestic certain factory produces, be processed into the chip that thickness is not more than 1mm.
Take by weighing sample 2.000g, place the 400mL beaker, add 45ml chloroazotic acid (1+1) and cover surface plate, placement is spent the night, and the beaker that will fill sample is then put into 90 ℃ water-bath, and maintenance 20min, take out, be cooled to room temperature, solution is moved in the 100mL volumetric flask, be diluted to scale with deionized water, shake up.Do blank test in company with test.
Preparation contains the serial solution that potassium borohydride is 0.5g/L, 1g/L, 2g/L, 4g/L, 6g/L, 8g/L, 10g/L (wherein containing NaOH 5g/L) respectively, hydrochloric acid with 5% is done current-carrying, sample solution and serial solution are introduced the atomic fluorescence spectrometer reactive system, the mercuryvapour that is produced is introduced in the atomic fluorescence spectrometer with carrier gas, under selected Instrument measuring condition, measure, it the results are shown in Table 2.
The test of table 2 reductive agent (potassium borohydride) concentration
| Reductant concentration (g/L) | 0.5 | 1 | 2 | 4 | 6 | 8 | 10 |
| Fluorescence intensity | 89.2 | 91.9 | 173.8 | 449.1 | 543.6 | 506.1 | 392.0 |
As can be seen from Table 2, the concentration of potassium borohydride is the fluorescence intensity maximum when 6g/L, uses concentration so elect as to measure.
Embodiment 4
Prepare the campaign solution that 6 parts of mercury contents are respectively 0.1 μ g/L, 0.2 μ g/L, 0.4 μ g/L, 0.6 μ g/L, 0.8 μ g/L, 1.0 μ g/L respectively.
Prepare 5% hydrochloric acid solution and 5% salpeter solution in addition respectively, preparation simultaneously contains NaOH 5g/L, the mixed solution of potassium borohydride 6g/L, itself and testing liquid are together introduced reactive system, the mercuryvapour that is produced is introduced in the atomic fluorescence spectrometer with carrier gas, under selected Instrument measuring condition, measure, the results are shown in Table 3
Fluorescence intensity when current-carrying is done in the different acid of table 3
| Mercury (μ g/L) | 0.1 | 0.2 | 0.4 | 0.8 | 1.0 |
| Hydrochloric acid | 32.95 | 65.61 | 129.8 | 243.9 | 303.1 |
| Nitric acid | 28.27 | 56.84 | 110.2 | 220.3 | 281.2 |
When doing current-carrying with nitric acid as can be seen from Table 3, fluorescence intensity all has when doing current-carrying with hydrochloric acid on the low side slightly, so the present invention adopts hydrochloric acid to do current-carrying.
Embodiment 5
Get the aluminium ingot sample that domestic certain factory produces, be processed into the chip that thickness is not more than 1mm.
Take by weighing sample 2.000g, place the 400mL beaker, add 45ml chloroazotic acid (1+1) and cover surface plate, placement is spent the night, and the beaker that will fill sample is then put into 90 ℃ water-bath, and maintenance 20min, take out, be cooled to room temperature, solution is moved in the 100mL volumetric flask, be diluted to scale with deionized water, shake up.
Prepare 5 parts of hydrochloric campaign solution of 1%, 30%, 5%, 7%, 10% of being respectively respectively.Preparation simultaneously contains NaOH 5g/L, the mixed solution of potassium borohydride 6g/L, itself and sample solution and testing liquid are together introduced the atomic fluorescence spectrometer reactive system, the mercuryvapour that is produced is introduced in the atomic fluorescence spectrometer with carrier gas, under selected Instrument measuring condition, measure, the results are shown in Table 4.
The hydrochloric acid of table 4 variable concentrations is done the current-carrying test
| Concentration of hydrochloric acid (%) | 1 | 3 | 5 | 7 | 10 |
| Fluorescence intensity | 85.8 | 125.7 | 145.7 | 147.9 | 148.7 |
Concentration of hydrochloric acid is on the low side less than 5% o'clock fluorescence intensity as can be seen from Table 4, and fluorescence intensity tended towards stability in 5%～10% o'clock, so the present invention adopts 5% hydrochloric acid to make current-carrying.
Embodiment 6
Get the aluminium ingot sample that domestic certain factory produces, be processed into the chip that thickness is not more than 1mm.
Take by weighing the 2.000g sample and place the 400ml beaker for four parts, add the mercury standard solution of different content in three parts, portion does not add the mercury standard solution, adds 45ml chloroazotic acid (1+1) and covers surface plate, placement is spent the night, the beaker that will fill sample is then put into 90 ℃ water-bath, and keeps 20min, takes out, be cooled to room temperature, solution is moved in the 100mL volumetric flask, be diluted to scale, shake up with deionized water.Do blank test in company with test.
Sample solution that above dissolving is good and the above solution of potassium borohydride of preparing (with embodiment 2), hydrochloric acid with 5% is that current-carrying is introduced the reactive system in the atomic fluorescence spectrometer, the mercuryvapour that is produced is introduced in the atomic fluorescence spectrometer with carrier gas, under selected Instrument measuring condition, measure, it the results are shown in Table 5.
Table 5 mark-on recovery test
| Sequence number | Sample mercury content μ g/L | Addition μ g/L | The amount of recording μ g/L | Recovery % |
| 1# | 0.11 | 0.1 | 0.22 | 110 |
| 2# | 0.11 | 0.2 | 0.30 | 95 |
| 3# | 0.11 | 0.5 | 0.64 | 106 |
By recovery test as can be seen, the accuracy of the inventive method is higher, can satisfy the analysis of Trace Mercury in the aluminium ingot fully.
Claims (2)
1. the assay method of Trace Mercury in the aluminium ingot, its spy is that its test process is with the molten sample of sample, suppress the volatilization of mercury, and the adding reductive agent utilizes hydride to take place the Trace Mercury enrichment in the aluminium ingot, after forming mercuryvapour, introducing is measured with atomic fluorescence spectrometer, draws test result.
2. the assay method of Trace Mercury in a kind of aluminium ingot according to claim 1, its spy is that its test process may further comprise the steps:
(1) course of dissolution of sample is: will take by weighing sample 2.000g, place the 400mL beaker, add 45ml chloroazotic acid (1+1) and cover surface plate, placement is spent the night, and the beaker that will fill sample is then put into 90 ℃ water-bath, and maintenance 20min, take out, be cooled to room temperature, solution is moved in the 100mL volumetric flask, be diluted to scale with deionized water, shake up;
(2) the mensuration process of sample is: sample that above dissolving is good and the mixed solution that contains 5g/L NaOH-6g/L potassium borohydride are together, hydrochloric acid with 5% is that current-carrying is introduced the reactive system in the atomic fluorescence spectrometer, with the argon gas carrier gas with mercuryvapour that reduction reaction produced, introduce in the atomic fluorescence spectrometer, under selected Instrument measuring condition, according to the relation that the concentration of fluorescence intensity and mercury is directly proportional, the Trace Mercury in the quantitative measurement aluminium ingot product.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101995439A (en) * | 2009-08-12 | 2011-03-30 | 中国科学院生态环境研究中心 | Efficient liquid chromatogram-atomic fluorescence spectrum method for measuring mercury forms |
| CN101482506B (en) * | 2008-01-10 | 2012-03-28 | 江苏江分电分析仪器有限公司 | Mercury content measuring method and device |
| CN102706847A (en) * | 2012-06-18 | 2012-10-03 | 苏州国环环境检测有限公司 | Method for measuring arsenic and mercury in water by hydride generation-atomic fluorescence spectrometry |
| CN102721676A (en) * | 2012-06-18 | 2012-10-10 | 苏州国环环境检测有限公司 | Method for stably measuring arsenic and mercury in water by atomic fluorescence spectrometry |
| CN112683611A (en) * | 2020-11-12 | 2021-04-20 | 北京星航机电装备有限公司 | Digestion solution and method for determining element content in refined aluminum ingot for remelting |
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| CN1419118A (en) * | 2002-12-12 | 2003-05-21 | 施文健 | Novel method for investigating cadmium and mercury |
| CN2621297Y (en) * | 2003-05-31 | 2004-06-23 | 中国科学院近代物理研究所 | Super-microscale mercury element gas phase thermal chromatograph separater |
| CN1624454A (en) * | 2003-12-03 | 2005-06-08 | 上海化工研究院 | Determination method of microelement mercury in ferti lizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101482506B (en) * | 2008-01-10 | 2012-03-28 | 江苏江分电分析仪器有限公司 | Mercury content measuring method and device |
| CN101995439A (en) * | 2009-08-12 | 2011-03-30 | 中国科学院生态环境研究中心 | Efficient liquid chromatogram-atomic fluorescence spectrum method for measuring mercury forms |
| CN102706847A (en) * | 2012-06-18 | 2012-10-03 | 苏州国环环境检测有限公司 | Method for measuring arsenic and mercury in water by hydride generation-atomic fluorescence spectrometry |
| CN102721676A (en) * | 2012-06-18 | 2012-10-10 | 苏州国环环境检测有限公司 | Method for stably measuring arsenic and mercury in water by atomic fluorescence spectrometry |
| CN112683611A (en) * | 2020-11-12 | 2021-04-20 | 北京星航机电装备有限公司 | Digestion solution and method for determining element content in refined aluminum ingot for remelting |
| CN112683611B (en) * | 2020-11-12 | 2022-12-06 | 北京星航机电装备有限公司 | Digestion solution and method for determining element content in refined aluminum ingot for remelting |
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| Publication number | Publication date |
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| CN100543461C (en) | 2009-09-23 |
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