流动注射在线分离富集火焰原子吸收测定地质样品中银的含量

Determination of Silver in Geological Materials by Flow Inject Flame Atomic Absorption Spectrometry with on-Line Separation and Preconcentration

采用ＰＴ－Ｃ１８色谱预处理柱，以双硫腙为螯合剂，甲醇为洗脱剂，将流动注射在线分离富集与原子吸收联用，成功地测定了地质样品中银的含量．１ｍｉｎ富集（４．２ｍＬ）的富集倍率２４，检出限０．６２μｇ／Ｌ，相对标准偏差１．８％．

The concentrations of silver in geological materials were determined successively by atomic absorption spectrometry with on-line PT-C 18 pre-column-FIA,and dithizone was used as chelating agent,methanol was used as eluant .The enrichment factor for one minute (4.2 mL) was 24, detect limit was 0.62 μg/L, relative standard deviation was 1.8% .