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使用 PT- C18色谱预处理柱 ,以双硫腙为螯合剂 ,甲醇为洗脱剂 ,采用流动注射在线分离富集与原子吸收联用技术 ,对银的测定进行了研究。 1 min富集 ( 4 .2 m L)的富集倍率 2 4 ,检出限为 0 .6 2μg/ L,相对标准偏差为 1 .8% ( n=7)。
Using PT-C18 pretreatment column, dithizone as chelating agent, methanol as eluent, flow injection on-line separation and enrichment and atomic absorption spectrometry were used to determine the silver. The enrichment ratio (2.4 μmol) of 1 min enrichment (4.2 μmol) was 24, with a detection limit of 0.262 μg / L and a relative standard deviation of 1.8% (n = 7).