Standard Code | Standard Title | Standard Class | Order |
---|---|---|---|
GB/T 12374-1990 |
Standard method for examination of nitrate in air of residential areas--Reduction of the cadmium column--Spectrophotometry of N-(1-naphthyl) ethylene diaminehydrochloride 居住区大气中硝酸盐检验标准方法 镉柱还原-盐酸萘乙二胺分光光度法 |
China National Standards method examination nitrate |
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