GB/T 4372.7-2014 in English

《GB/T 4372.7-2014直接法氧化锌化学分析方法 第7部分：三氧化二铁量的测定 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三氧化二铁量的测定方法。
本部分适用于直接法氧化锌中三氧化二铁量的测定。测定范围:0.010%~0.10%。

Methods for chemical analysis of zinc oxide produced by direct process -
Part 7: Determination of ferric oxide content - Flame atomic absorption spectrometry method

1 Scope

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

This part is applicable to the determination of ferric oxide content of zinc oxide produced by direct process, with a determination range of 0.010%~0.10%.

2 Method summary

Dissolve the specimen with hydrochloric acid and nitric acid, evaporate it and then apply air-acetylene flame in dilute hydrochloric acid medium, and measure the absorbance of iron at the wavelength of 248.3 nm of the atomic absorption spectrophotometer, and then calculate the ferric oxide content by the standard curve method.

3 Reagents

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