GB/T 12689.4-2004
鋅及鋅合金化學分析方法 銅量的測定 二乙基二硫代氨基甲酸鉛分光光度法、火焰原子吸收光譜法和電解法
The methods for chemical analysis of zinc and zinc alloys-The determination of copper content-The lead diethyldithio-carbamate spectrophotometric method and the flame atomic absorption spectrometric method and the electrolytic method
GBT12689.4-2004, GB12689.4-2004