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Flame atomic absorption spectrometric analysis method of litbium in eledrolyte cryolite
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YS/T 768-2011
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Basic data | Standard ID | YS/T 768-2011 (YS/T768-2011) | | Description (Translated English) | Flame atomic absorption spectrometric analysis method of litbium in eledrolyte cryolite | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H12 | | Classification of International Standard | 77.120.10 | | Word Count Estimation | 6,631 | | Date of Issue | 2011-12-20 | | Date of Implementation | 2012-07-01 | | Regulation (derived from) | ?MIIT Announcement 2011 No.43 | | Issuing agency(ies) | Ministry of Industry and Information Technology | | Summary | This standard specifies the method for the determination of aluminum electrolyte lithium content. This standard applies to the determination of aluminum electrolyte lithium content. Measuring range of 0. 100% to 3. 00%. | YS/T 768-2011: Flame atomic absorption spectrometric analysis method of litbium in eledrolyte cryolite
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Flame atomic absorption spectrometric analysis method of litbium in eledrolyte cryolite
ICS 77.120.10
H12
People's Republic of China Nonferrous Metals Industry Standard
Determination of Lithium Content in Aluminum Electrolytes
Flame atomic absorption spectrometry
2011-12-20 release
2012-07-01 Implementation
Issued by the Ministry of Industry and Information Technology of the People's Republic of China
Foreword
This standard is drafted in accordance with the plan given in GB/T 1.1-2009.
This standard is owned by the National Committee for the Standardization of Nonferrous Metals (SAC/TC243).
This standard is drafted by China Aluminum Corporation Guizhou Branch.
This standard is drafted by Inner Mongolia Huohe Hongjun Aluminum Electricity Co., Ltd. and Shandong Nanshan Aluminum Co., Ltd.
The main drafters of this standard. Wang Qian, Wang Baosheng, Fan Qing, Zhong Shihua, Li Zhihui, He Chunyan, Chen Hongjun, Yang Zhenhua.
Determination of Lithium Content in Aluminum Electrolytes
Flame atomic absorption spectrometry
1 Scope
This standard specifies the determination of lithium content in aluminum electrolytes.
This standard is applicable to the determination of lithium in aluminum electrolytes. The measurement range is 0.100% ~ 3.00%.
2 method summary
The sample is dissolved in sulfuric acid, heated to remove fluoride, dissolved with hydrochloric acid and water; or dissolved with hydrochloric acid and boric acid, the test solution in the atomic absorption spectrometer
At a wavelength of 670.8 nm, the lithium content was measured with an air-acetylene flame.
3 reagent
3.1 sulfuric acid (ρ1.84g/mL), excellent grade pure.
3.2 hydrochloric acid (ρ1.19g/mL), excellent grade pure.
3.3 Hydrochloric acid (1 1).
3.4 boric acid.
3.5 lithium standard storage solution. using any of the following methods to configure the lithium standard storage solution.
3.5.1 Weigh 6.1078g anhydrous lithium chloride (pure spectrum) or 7.9202g lithium sulfate (pure spectrum), dissolved in a small amount of water, into the 1000mL
Capacity bottle, diluted with water to the mark, shake. 1 mL of this solution contained 1 mg of lithium.
3.5.2 Weigh 5.3228g of lithium carbonate (pure spectrum), add about 150mL of water, slowly add hydrochloric acid (3.3) to dissolve completely, boil remove two
Carbon dioxide, cooled into the 1000mL volumetric flask, diluted with water to the mark, shake. 1 mL of this solution contained 1 mg of lithium.
3.6 lithium standard solution. remove the 10.00mL lithium standard storage solution (3.5) in a 250mL volumetric flask, diluted with water to the mark, mix,
This solution contains 1 mL of 0.04 mg of lithium.
3.7 anhydrous ethanol, analytical grade.
4 instruments and equipment
4.1 platinum dish. diameter 80mm, height 35mm.
4.2 Atomic Absorption Spectrometer, with lithium hollow cathode lamp.
In the best working conditions of the instrument, any atomic absorption spectrometer that achieves the following indicators can be used.
--- Characteristic concentration. In the solution consistent with the measurement solution matrix, the characteristic concentration of lithium is not more than 1.0μg/mL.
--- precision. with the highest concentration of standard solution measured 10 times, the standard deviation should not exceed 1.0% of the average absorbance; with the lowest
Concentration of the standard solution measured 10 times, the standard deviation should not exceed the maximum concentration of the standard solution of the average absorbance of 0.5%.
--- work curve linear. the work curve by the concentration of divided into five sections, the highest section of the difference between the absorbance and the difference between the lowest absorbance of the difference
Should not be less than 0.7.
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