摘要
研究了双硫腙螯合形成树脂的合成及其分离富集地质样中Ａｕ、Ｐｔ、Ｐｄ的条件。于ｐＨ １．５的ＣＨＩ介质中，Ａｕ、Ｐｔ、Ｐｄ定量吸附于Ｈ２Ｄｚ形成树脂上与大量贱金属分离。用０．６ｍｏｌ／Ｌ的硫脲－０．１ｍｏｌ／Ｌ ＨＣＩ洗脱贵金属，回收率均在 ９４％～１０６％之间。铁也部分上柱，用磺基水杨酸（４％）与酒石酸（４％）１：１联合掩蔽除去。通过７２－Ｐｔ－０２标样测定，结果令人满意，证明不带磺酸基的以—ＮＨ为交换基团的具互变异构的含硫官能团的一类螯合剂的形成树脂也可用于复杂地质样中贵重金属的分离富集与测定。且树脂经处理重复使用三次仍能定量回收。
The conditions for synthesis of dithizone chelate forming resin and for separation and preconcentration of Au, Pt and Pd in geological samples have been investigated in this paper. Experiments show that Au, Pt and Pd in solution are enriched on dithizone chelate forming resin column in pH 1. 5 HCI and are eluted with 0. 6 mol/L sulfourea -0.1 mol/L HCI. The recovery of Au.Pt and Pd is 96%-l04%. Results obtained by the analysis of a standard sample are satisfactory. It is proved that dithizone chelate forming resin without sulfonic group but with -NH as ion exchange group can also be used for separation and pre- concentration of Au, Pt and Pd in geological samples, and can be used repeatedly more than 3 times.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1997年第4期404-407,共4页
Chinese Journal of Analytical Chemistry
基金
地质行业基金资助项目
关键词
双硫脲
螯合形成树脂
地质样
金
铂
钯
Dithizone, chelate forming resin, separation, preconcentration, geological sam- ple, gold, platinum, palladium, atomic absorption spectrometry
