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