以PT-C_(18)色谱预柱在线流动注射分离富集火焰原子吸收法测定银

Studies on the Determination of Silver by PT C_(18) Pre-Column Flow Injection Flame Atomic Absorption Spectrometry With On-line Separation and Enrichment

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)。

The determination of silver was studied by atomic absorption spectrometry with on line PT C 18 pre column FIA separation and enrichment technology. In this system , dithizone was used as chelating agent, methanol was used as eluant .The enrichment factor for one minute (4.2mL) is 24, detection limit is 0.62 μg/L,and relative standard deviation is 1.8%.