GB/T 4372.2-2014Methods for chemical analysis of zinc oxide produced by direct process - Part 2: Determination of lead oxide content - Flame atomic absorption spectrometry method (English PDF)
直接法氧化锌化学分析方法 第2部分：氧化铅量的测定 火焰原子吸收光谱法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 5, 2014
Implementation date
August 1, 2015
Scope
GB/T 4372.2-2014 is the English-translated version of 直接法氧化锌化学分析方法 第2部分：氧化铅量的测定 火焰原子吸收光谱法.
GB/T 4372.2-2014 is the Chinese standard "Methods for chemical analysis of zinc oxide produced by direct process - Part 2: Determination of lead oxide content - Flame atomic absorption spectrometry method".
Its scope clause reads: GB/T 4372 provisions of this part of the determination of the amount of lead oxide zinc oxide direct method. This section applies to the determination of the amount of lead oxide zinc oxide direct method.
Determination range of 0.010% to 1.00%. Its clauses include method summary; reagents; instrument; sample.
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Document preview — GB/T 4372.2-2014
National Standard of the People's Republic of China
- ICS
- 77.120.60
- Classification
- H 13
- Replacing
- GB/T 4372.2-2001
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Method summary
- 3 Reagents
- 4 Instrument
- 5 Sample
1 Scope
GB/T 4372 provisions of this part of the determination of the amount of lead oxide zinc oxide direct method.
This section applies to the determination of the amount of lead oxide zinc oxide direct method. Determination range of 0.010% to 1.00%.
2 Method summary
Sample with nitric acid dissolved in dilute nitric acid medium, using air - acetylene flame atomic absorption spectrometer measured at a wavelength of 283.3nm
Lead absorbance to a standard curve method to calculate the amount of lead oxide.
3 Reagents
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
Nitrate 3.1 (rho1.42g/mL).
3.2
nitric acid (11).
3.3 lead standard stock solution
Weigh 1.0000g metallic lead (wPb>=99.99%) in 300mL beaker, add 10mL of nitric acid (3.2), heat gently to dissolve, remove the cooled and transferred to 1000mL volumetric flask, add 90mL of nitric acid (3.2), dilute to the mark and mix.
This solution 1mL containing 1.0mg lead.
3.4 Lead standard solution
Pipette 10.00mL lead standard stock solution (3.3) in 100mL flask, add 5mL nitric acid (3.2), with
Dilute with water to volume, and mix. This solution 1mL containing 100µg lead.
4 Instrument
Atomic absorption spectrometer, with a lead hollow cathode lamp.
Under optimum working conditions for those who can reach the following indicators can be used.
Sensitivity. In line with the measurement sample solution matrix solution, characterized in lead concentration should not exceed 0.3µg/mL.
Precision. standard solution measuring the absorbance of the highest concentration of 10 times, the standard deviation should not exceed the maximum concentration of the standard mean absorbance
0.5% luminosity.
Linear curve. The curve is divided into five sections according to concentration, than the difference between the absorbance of the absorbance difference between the highest and the lowest segment segment,
It should not be less than 0.8.
5 Sample
5.1
Sample size should be less than 0.10mm.
5.2
Sample beforehand at 100 °C ~ 105 °C after drying 2h, placed in a desiccator, cool to room temperature.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 4372.2
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 4372.2-2014 | Methods for chemical analysis of zinc oxide produced by direct process - Part 2: Determination of lead oxide content - Flame atomic absorption spectrometry method | current edition | Current |
| GB/T 4372.2-2001 | Methods for chemical analysis of zinc oxide produced by direct process - Part 2: Determination of lead oxide content - Flame atomic absorption spectrometry method | previous edition | Superseded |
This page sells the current edition, GB/T 4372.2-2014. Earlier editions are listed for reference only.
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Related Standards
GB/T 4372.3-2015 — Methods for chemical analysis of zincoxide produced by direct process - Part 3: Determination of copper oxide content - Flame atomic absorption spectrometry method
GB/T 4372.1-2001 — Methods for chemical analysis of zinc oxide produced by direct process - Determination of zinc oxide content - Na2 EDTA titration method
GB/T 4372.3-2001 — Methods for chemical analysis of zinc oxide produced by direct process - Determination of copper oxide content - Atomic absorption spectrometry method
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