GB/T 7731.6-2008 in English

ＧＢ／Ｔ７７３１的本部分是对GB/T 7731.6-1987《钨铁化学分析方法　钼蓝光度法测定砷量》的修订，包括了钼蓝光度法和电感耦合等离子体原子发射光谱法两个分析方法。
本部分代替GB/T 7731.6-1987。
GB/T 7731的本部分规定了用钼蓝光度法和电感耦合等离子体原子发射光谱法测定钨铁中的砷量。
本部分适用于钨铁中砷含量的测定。钼蓝光度法测定范围（质量分数）：0.010%～0.10% ；电感耦合等离子体原子发射光谱法测定范围（质量分数）：0.010%～0.20%。
本部分与GB/T 7731.6-1987比较，主要变化如下：
———对钼蓝光度法的标准文本编写格式进行了规范；
———增加了电感耦合等离子体原子发射光谱法。

Scope

Warning: Personnel using this part of GB/T 7731 should have practical experience in formal laboratory work. This section does not address all possible security issues. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. This part of GB/T 7731 specifies the determination of arsenic in ferro-tungsten by molybdenum blue photometry and inductively coupled plasma atomic emission spectrometry. This section applies to the determination of arsenic content in iron tungsten. The measurement range (mass fraction) of molybdenum blue photometry: 0.010% to 0.10%; the measurement range (mass fraction) of inductively coupled plasma atomic emission spectrometry: 0.010% to 0.20%.