CN101055252A - Method for determining minim plumbum of aluminium ingot - Google Patents
Method for determining minim plumbum of aluminium ingot Download PDFInfo
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- CN101055252A CN101055252A CN 200710099810 CN200710099810A CN101055252A CN 101055252 A CN101055252 A CN 101055252A CN 200710099810 CN200710099810 CN 200710099810 CN 200710099810 A CN200710099810 A CN 200710099810A CN 101055252 A CN101055252 A CN 101055252A
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- sample
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- aluminium ingot
- plumbous
- trace
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 43
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000004411 aluminium Substances 0.000 title claims description 38
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 41
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 21
- 239000012159 carrier gas Substances 0.000 claims abstract description 13
- 229910052786 argon Inorganic materials 0.000 claims abstract description 12
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012488 sample solution Substances 0.000 claims abstract description 7
- 150000004678 hydrides Chemical class 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract description 5
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 31
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 26
- 238000005303 weighing Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 10
- 229910052700 potassium Inorganic materials 0.000 claims description 10
- 239000011591 potassium Substances 0.000 claims description 10
- -1 potassium ferricyanide Chemical compound 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 9
- 238000003556 assay Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 7
- 238000010025 steaming Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000004090 dissolution Methods 0.000 claims description 5
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical compound Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 claims description 4
- 230000002829 reductive effect Effects 0.000 claims description 4
- 238000012956 testing procedure Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000673 graphite furnace atomic absorption spectrometry Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012086 standard solution Substances 0.000 description 2
- 206010020772 Hypertension Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 231100000570 acute poisoning Toxicity 0.000 description 1
- 208000007502 anemia Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000001391 atomic fluorescence spectroscopy Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001537 neural effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Abstract
The invention relates to a measuring method for micro lead in aluminum ingot, especially to a measurement for micro lead in remelting aluminum ingot product. The method is characterized in that: measured sample is dissolved by aqua regia, oxidant is added to oxide low valence state lead ion to high valence state lead ion, sodium hydroxide solution is used to control acidity of solution, then reducing agent is added to transform lead ion in sample solution to gaseous hydride, argon gas is used as carrier gas to introduce the hydride into atom fluorescence spectrometer measurement system. The method can accurately and fast measure lead content in aluminum ingot, and is adapted for analysis of micro lead for aluminum ingot manufacturer.
Description
Technical field
Micro-plumbous assay method in a kind of aluminium ingot relates to the plumbous assay method of trace in a kind of aluminium ingot, special remelting plumbous mensuration of trace in the aluminium ingot product.
Background technology
In the technical standard of the national aluminium ingot product of issuing in 2002, with reference to the regulation among the international standard ISO/T115, stipulated that clearly the content that is used for the aluminium product As relevant with environment and human health such as medicine, food, Gd, Pb must not be greater than 0.01% in the technical standard of China's aluminium ingot product.China is that the world produces aluminium big country, further opening along with accession to WTO and market, the aluminium industrial market of China is circulated fully with world market, requirement to product quality is also more and more higher, particularly in recent years, increase along with outlet aluminium ingot amount, the foreign trader has proposed requirement to amount little in the aluminium product, the trace harmful element, measure the amount of trace harmful elements in the aluminium ingot fast and 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.Lead is a kind of harmful element wherein, lead and compound thereof are one of chemical substances of 17 kinds of serious harm human longevities and physical environment, exist excessive lead will cause neural and regenerative system disorder in the human body, hypoevolutism, hemochrome reduce, and cause anaemia and hypertension, and the lead of human body accumulation suction 0.04g can cause acute poisoning.Because the article of now a lot of household electrical appliance and splendid attire food are done raw material production by aluminium, so content plumbous in the aluminium will cause enough attention.And micro-lead does not still have comparatively ideal analytical approach in the present aluminium ingot, as using the micro-plumbous insufficient sensitivity in the aas determination aluminium ingot, its minimum mensuration lower limit is 0.00XX%, and is also powerless for the lead of content in the aluminium ingot between 0.0000X～0.000X%; Plasma spectroscopy is measured the plumbous because interference of aluminum substrate of trace in the aluminium ingot, minimumly can only measure 0.0X%, and the detection limit of GFAAS (graphite furnace atomic absorption spectrometry) can satisfy the plumbous mensuration of trace in the aluminium ingot, but reappearance is relatively poor; Anode volt-ampere leaching mensuration process has the pollution of mercury, less stable as a result.
Summary of the invention
Purpose of the present invention is exactly the deficiency that the above-mentioned prior art of specific aim exists, and a kind of sensitivity and accuracy, raising analysis efficiency that can effectively improve mensuration is provided, saves the plumbous method of trace in the mensuration aluminium ingot of analysis cost, protection environment
Method of the present invention is achieved through the following technical solutions.
The plumbous assay method of trace in a kind of aluminium ingot, it is characterized in that its test process is the sample that will take by weighing, use aqua regia dissolution, adding oxygenant makes the lead ion of sample middle or low price attitude be oxidized to high valence state, with the acidity of sodium hydroxide solution control solution,, make lead ion in the sample solution be converted into the hydride of gaseous state again with the reductive agent reaction, do carrier gas with argon gas and be introduced into the atomic fluorescence spectrometer measuring system, measure.
The plumbous assay method of trace in a kind of aluminium ingot of the present invention is characterized in that its testing procedure comprises:
(1) course of dissolution of sample
Take by weighing sample 0.1000g, place beaker, add little water, add 15ml chloroazotic acid (1+1) and cover surface plate, after treating that vigorous reaction stops, being placed on heating for dissolving on the electric furnace, and steaming near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask, hydrochloric acid solution constant volume with 2%;
(2) the mensuration process of sample:
The sample that above dissolving is good and contain the mixed solution of NaOH of potassium borohydride, the 11g/L potassium ferricyanide, the 12g/L of 10g/L is done current-carrying with 2% hydrochloric acid and is together introduced reactive system in the atomic fluorescence spectrometer, the PbH that is produced
4Gas is done carrier gas with argon gas and is introduced in the atomic fluorescence spectrometer, and under selected Instrument measuring parameter, according to the relation that fluorescence intensity and plumbous concentration are directly proportional, the trace in the quantitative measurement aluminium ingot product is plumbous.
Method of the present invention must preparation reagent have 1, Pb standard solution (1mg/mL), the time spent is diluted to 10 μ g/L; 2, KBH
4Solution 10g/L; 3, K
3Fe (CN)
6Solution 11g/L; 4, NaOH solution 12g/L; 5, HCL solution 2%; 6, chloroazotic acid (1+1); 7, argon gas (99.99%).
It is atomic fluorescence spectrometer that method of the present invention is measured employed instrument.
The employed sample of method of the present invention should be processed into the chip that thickness is not more than 1mm.
The selected Instrument measuring parameter of method of the present invention is: 200 ℃ of negative high voltage 260V, lamp current 60mA, observed altitude 8em atomization temperatures, carrier gas flux 400mL/min, shield gas flow amount 800mL/min (atomic fluorescence spectrometer of different model is owing to the sensitivity difference, and location parameter is slightly different).
A kind of control of passing through the reaction conditions of sample of method of the present invention takes place the micro-plumbous richness in the aluminium ingot is amassed with hydride, measures with atomic fluorescence spectrometry, has obtained good result.Can determine the plumbous content of trace in the aluminium ingot accurately and rapidly, be applicable to that all aluminium ingot manufacturers in the whole nation carry out the plumbous analysis of trace, to produce the aluminium ingot product of the quality requirements that is up to state standards.
Embodiment
The plumbous assay method of trace in a kind of aluminium ingot, its test process is the sample that will take by weighing, use aqua regia dissolution, adding oxygenant makes the lead ion of sample middle or low price attitude be oxidized to high valence state, with the acidity of sodium hydroxide solution control solution,, make lead ion in the sample solution be converted into the hydride of gaseous state again with the reductive agent reaction, do carrier gas with argon gas and be introduced into the atomic fluorescence spectrometer measuring system, measure.
Its testing procedure comprises: the course of dissolution of (1) sample: take by weighing sample 0.1000g, place beaker, add little water, add 15ml chloroazotic acid (1+1) and cover surface plate, treat that vigorous reaction stops after, be placed on heating for dissolving on the electric furnace, and steam near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask hydrochloric acid solution constant volume with 2%; (2) the mensuration process of sample: the mixed solution of sample that above dissolving is good and the NaOH of the potassium borohydride that contains 10g/L, the 11g/L potassium ferricyanide, 12g/L, do current-carrying with 2% hydrochloric acid and together introduce reactive system in the atomic fluorescence spectrometer, the PbH that is produced
4Gas is done carrier gas with argon gas and is introduced in the atomic fluorescence spectrometer, and under selected Instrument measuring parameter, according to the relation that fluorescence intensity and plumbous concentration are directly proportional, the trace in the quantitative measurement aluminium ingot product is plumbous.
That the invention will be further described is as follows in conjunction with example:
The condition determination of atomic fluorescence spectrometer is: lamp current 60mA, negative high voltage 260V, observed altitude 8mm, 200 ℃ of atomization temperatures, carrier gas flux 400mL/min, shield gas flow amount 800mL/min.Different instrumental sensitivity differences, condition determination are slightly different.
Embodiment 1
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 2 parts in 0.1000g sample, content plumbous in the sample is respectively 0.0004%-0.0022%, and sample is placed the 300ml beaker, add little water, add 15mL wang aqueous solution (1+1), cover surface plate, treat that vigorous reaction stops after, be placed on heating for dissolving on the electric furnace, and steam near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask hydrochloric acid solution constant volume with 2%.
Other takes by weighing 3.6g NaOH in the 500mL beaker that fills little water, after the dissolving, adds the stirring of 3.0g potassium borohydride and makes its dissolving, then, adds the 3.3g potassium ferricyanide again, is diluted to 300mL with deionized water.The addition sequence of reagent can not be put upside down.
Pipette 10.0mL top grade pure hydrochloric acid in the 500mL volumetric flask, be diluted to scale with deionized water, mixing is used as current-carrying.Do blank test in company with sample.
The mixed solution of sample that above dissolving is good and the NaOH (acidity adjustment) of the potassium borohydride (reductive agent) that contains 10g/L, the 11g/L potassium ferricyanide (oxygenant and screening agent), 12g/L, do current-carrying with 2% hydrochloric acid and together introduce reactive system in the atomic fluorescence spectrometer, the PbH that reaction is produced
4Gas is done carrier gas with argon gas and is introduced in the atomic fluorescence spectrometer, under selected Instrument measuring parameter, measures.
Finish when shared 1.5 hours from taking by weighing sample (plumbous content 0.0004%) to measuring, the mean value of measuring fluorescence intensities for 11 times is 976.08, standard deviation 9.3661, coefficient of alteration 0.96%.
Finish when shared 1.5 hours from taking by weighing sample (plumbous content 0.0022%) to measuring, the mean value of measuring fluorescence intensities for 11 times is 332.89, standard deviation 2.6608, coefficient of alteration 0.8%.
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 the 0.1000g sample, sample is placed the 300ml beaker, add little water, add 15mL wang aqueous solution (1+1), cover surface plate, after treating that vigorous reaction stops, being placed on heating for dissolving on the electric furnace, and steaming near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask, hydrochloric acid solution constant volume with 2%.
Preparation contains the serial solution of potassium ferricyanide 8g/L, 10g/L, 11g/L, 12g/L, 14g/L respectively, preparation simultaneously contains NaOH 12g/L, the mixed solution and the sample solution that contain potassium borohydride 10g/L are together introduced atomic fluorescence spectrometer reactive system, the PbH that is produced
4Gas is done carrier gas with argon gas and is introduced in the atomic fluorescence spectrometer mensuration system, under selected Instrument measuring parameter, measures.The results are shown in Table 1
The test of table 1 potassium ferricyanide concentration
| K 3Fe(CN) 6 (g/L) | 8 | 10 | 11 | 12 | 14 |
| Fluorescence intensity | 407.16 | 473.94 | 555.07 | 373.51 | 250.17 |
As can be seen from Table 1, the concentration of the potassium ferricyanide is the fluorescence intensity maximum when 11g/L, uses concentration so elect as to measure.
Embodiment 3
Use the sample identical with embodiment 2.
Take by weighing the 0.1000g sample, sample is placed the 300ml beaker, add little water, add 15mL wang aqueous solution (1+1), cover surface plate, after treating that vigorous reaction stops, being placed on heating for dissolving on the electric furnace, and steaming near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask, hydrochloric acid solution constant volume with 2%.
Preparation contains the serial solution of potassium borohydride 8g/L, 10g/L, 11g/L, 12g/L, 14g/L respectively, preparation simultaneously contains NaOH 12g/L, the mixed solution of potassium ferricyanide 11g/L and sample solution are together introduced the reactive system of atomic fluorescence spectrometer, the PbH that is produced
4Gas is done carrier gas with argon gas and is introduced in the atomic fluorescence spectrometer mensuration system, under selected Instrument measuring parameter, measures.The results are shown in Table 2.
The test of table 2 potassium borohydride concentration
| KBH 4(g/L) | 8 | 10 | 11 | 12 | 14 |
| Fluorescence intensity | 417.64 | 455.33 | 457.07 | 464.23 | 480.93 |
Potassium borohydride concentration is between 10g/L～12g/L as can be seen from Table 2, and fluorescence intensity changes little, but when 10g/L the blank value minimum, be mensuration concentration so select it.
Embodiment 4
Use the sample identical with embodiment 2.
Take by weighing the 0.1000g sample, sample is placed the 300ml beaker, add little water, add 15mL wang aqueous solution (1+1), cover surface plate, after treating that vigorous reaction stops, being placed on heating for dissolving on the electric furnace, and steaming near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask, hydrochloric acid solution constant volume with 2%.
Preparation contains the serial solution of NaOH 8g/L, 10g/L, 11g/L, 12g/L, 14g/L respectively, preparation simultaneously contains potassium borohydride 10g/L, the mixed solution of potassium ferricyanide 11g/L and sample solution are together introduced the reactive system of atomic fluorescence spectrometer, the PbH that is produced
4Gas is done carrier gas with argon gas and is introduced in the atomic fluorescence spectrometer mensuration system, measures under selected Instrument measuring parameter, the results are shown in Table 3
The test of table 3 naoh concentration
| NaOH(g/L) | 8 | 10 | 11 | 12 | 13 |
| Fluorescence intensity | 364.79 | 453.9 | 460.73 | 492.98 | 490.2 |
The size of the acidity of solution is bigger to result's influence as can be seen from Table 3, and the NaOH that contains 12g/L is favourable to measuring.It is ancient so the present invention adopts the naoh concentration of 12g/L as mensuration concentration.
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 two parts in 0.1000g sample and place 2 300ml beakers, the plumbous standard solution that adds different content respectively adds little water, adds 15mL wang aqueous solution (1+1), cover surface plate, after treating that vigorous reaction stops, being placed on heating for dissolving on the electric furnace, and steaming near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask, hydrochloric acid solution constant volume with 2%.Below measure with embodiment 1.Mark-on reclaims and the results are shown in Table 4.
Table 4 mark-on recovery test
| Sequence number | Sample lead content μ g/L | Addition μ g/L | The amount of recording μ g/L | Recovery % |
| 1# | 7.1 | 1.0 | 8.17 | 107 |
| 2# | 7.1 | 2.0 | 9.08 | 99 |
By recovery test as can be seen, the recovery of the inventive method is 99%～107%, and accuracy is higher.
Claims (2)
1. the plumbous assay method of trace in the aluminium ingot, it is characterized in that its test process is the sample that will take by weighing, use aqua regia dissolution, adding oxygenant makes the lead ion of sample middle or low price attitude be oxidized to high valence state, with the acidity of sodium hydroxide solution control solution,, make lead ion in the sample solution be converted into the hydride of gaseous state again with the reductive agent reaction, do carrier gas with argon gas and be introduced into the atomic fluorescence spectrometer measuring system, measure.
2. the plumbous assay method of trace in a kind of aluminium ingot according to claim 1 is characterized in that its testing procedure comprises:
(1) dissolving of sample
Take by weighing sample 0.1000g, place beaker, add little water, add 15m1 chloroazotic acid (1+1) and cover surface plate, after treating that vigorous reaction stops, being placed on heating for dissolving on the electric furnace, and steaming near and do, take off, be cooled to room temperature, solution is moved in the 100mL volumetric flask, hydrochloric acid solution constant volume with 2%;
(2) mensuration of sample:
The sample that above dissolving is good and contain the mixed solution of NaOH of potassium borohydride, the 11g/L potassium ferricyanide, the 12g/L of 10g/L is done current-carrying with 2% hydrochloric acid and is together introduced reactive system in the atomic fluorescence spectrometer, the PbH that is produced
4Gas is done carrier gas with argon gas and is introduced in the atomic fluorescence spectrometer, and under selected Instrument measuring parameter, according to the relation that fluorescence intensity and plumbous concentration are directly proportional, the trace in the quantitative measurement aluminium ingot product is plumbous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100998107A CN100573109C (en) | 2007-05-31 | 2007-05-31 | The plumbous assay method of trace in a kind of aluminium ingot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100998107A CN100573109C (en) | 2007-05-31 | 2007-05-31 | The plumbous assay method of trace in a kind of aluminium ingot |
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| Publication Number | Publication Date |
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| CN101055252A true CN101055252A (en) | 2007-10-17 |
| CN100573109C CN100573109C (en) | 2009-12-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141487A (en) * | 2010-12-16 | 2011-08-03 | 北京大学 | Method for separating and enriching trace lead in substrate |
| CN102346149A (en) * | 2011-06-21 | 2012-02-08 | 宁波广博纳米新材料股份有限公司 | Method for detecting lead content in submicron silver powder prepared through PVD method by using ICP |
| CN102680455A (en) * | 2011-03-14 | 2012-09-19 | 浙江省农业科学院 | Medium acidity control mathematical model for determining lead by using atomic fluorescence method |
| CN105067583A (en) * | 2015-08-05 | 2015-11-18 | 中华人民共和国连云港出入境检验检疫局 | Method for determination of content of lead in chrome ore |
| CN107688013A (en) * | 2017-08-10 | 2018-02-13 | 中国铝业股份有限公司 | Arsenic, the assay method of lead in a kind of water treatment agent calcium aluminate |
| 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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| CN100460865C (en) * | 2006-02-22 | 2009-02-11 | 北京吉天仪器有限公司 | Method for measuring lead in blood by using hydride generating atomic spectrum method |
| CN100541199C (en) * | 2006-04-25 | 2009-09-16 | 北京吉天仪器有限公司 | Ultraviolet assisted extraction hydride generation atomic spectroscopy is surveyed the method for blood lead |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141487A (en) * | 2010-12-16 | 2011-08-03 | 北京大学 | Method for separating and enriching trace lead in substrate |
| CN102141487B (en) * | 2010-12-16 | 2012-10-17 | 北京大学 | Method for separating and enriching trace lead in substrate |
| CN102680455A (en) * | 2011-03-14 | 2012-09-19 | 浙江省农业科学院 | Medium acidity control mathematical model for determining lead by using atomic fluorescence method |
| CN102346149A (en) * | 2011-06-21 | 2012-02-08 | 宁波广博纳米新材料股份有限公司 | Method for detecting lead content in submicron silver powder prepared through PVD method by using ICP |
| CN102346149B (en) * | 2011-06-21 | 2015-02-11 | 宁波广博纳米新材料股份有限公司 | Method for detecting lead content in submicron silver powder prepared through PVD method by using ICP |
| CN105067583A (en) * | 2015-08-05 | 2015-11-18 | 中华人民共和国连云港出入境检验检疫局 | Method for determination of content of lead in chrome ore |
| CN105067583B (en) * | 2015-08-05 | 2018-12-25 | 中华人民共和国连云港出入境检验检疫局 | The measuring method of lead content in a kind of chrome ore |
| CN107688013A (en) * | 2017-08-10 | 2018-02-13 | 中国铝业股份有限公司 | Arsenic, the assay method of lead in a kind of water treatment agent calcium aluminate |
| 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 |
|---|---|
| CN100573109C (en) | 2009-12-23 |
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