摘要
在王水介质中，ＰＶＣ－尼龙６树脂定量吸附Ａｕ（Ⅲ），而Ａｕ（Ⅰ）基本上不吸附。当存在碘离子时，Ａｕ（Ⅲ）和Ａｕ（Ⅰ）均能形成碘的络阴离子而被树脂定量吸附，从而可分别测出总金和Ａｕ（Ⅲ）的含量并计算出Ａｕ（Ⅰ）的含量。方法的检测限为１．６×１０－１１ｇ／Ｌ，样品加标回收率在８０％以上。为天然水中痕量金的价态分析提供了一个令人满意的方法。
The adsorption of Au(Ⅲ) and Au(Ⅰ) by the PVC nylon 6 resin is different in aqua regia.Au(Ⅲ) and Au(Ⅰ) react with I - to form - which is adsorbed quantitatively by the resin in the presence of I -.But without I - the resin only adsorbs - The amounts of total gold and Au(Ⅲ) can be dctermined and the content of Au(Ⅰ) can be calculated.The method has a lowest detection limit of 1.6×10 -11 g/L and the recovery is over 80%.A method is presented for the valence state analysis of trace gold in natural water.
出处
《分析试验室》
CAS
CSCD
1997年第1期59-61,共3页
Chinese Journal of Analysis Laboratory
