GB/T 4372.5-2014 in English

《GB/T 4372.5-2014直接法氧化锌化学分析方法 第5部分：锰量的测定 火焰原子吸收光谱法》由TC243（全国有色金属标准化技术委员会）归口，TC243SC2（全国有色金属标准化技术委员会重金属分会）执行，主管部门为中国有色金属工业协会。
GB/T4372的本部分规定了直接法氧化锌中锰含量的测定方法。
本部分适用于直接法氧化锌中锰含量的测定。测定范围为0.0001%~0.0010%。

Methods for chemical analysis of zinc oxide produced by direct process -
Part 5: Determination of manganese content - Flame atomic absorption spectrometry method

1 Scope

This part of GB/T 4372 specifies the methods for determining the manganese content of zinc oxide produced by direct process.

This part is applicable to the determination of manganese content of zinc oxide produced by direct process, with the determination range of 0.0001%~0.0010%.

2 Method summary

Dissolve the specimen with nitric acid, use ferric hydroxide as co-precipitant to separate trace manganese from a large amount of zinc matrix to realize enrichment, measure the absorbance of manganese in the test solution with the atomic absorption spectrometer at a wavelength of 279.5nm, and then determine the manganese content by working curve method.

3 Reagents and materials

Unless otherwise specified, only the recognized analytical reagents and deionized water with a resistivity not less than 18.2MΩ shall be used during the analysis.

3.1 Ammonium persulfate.

Foreword i
1 Scope
2 Method summary
3 Reagents and materials
4 Apparatus
5 Specimen
6 Analysis procedures
7 Calculation of analysis result
8 Precision
9 Test report