硫脲型树脂富集-石墨炉原子吸收光谱测定地质水中痕量金

Determination of Trace Gold in geology Water by Thiourea Model Resin Preconcentration-Graphite Furnace Atomic Absorption Spectrometry

本文研究了硫脲型树脂对金的吸附条件.提出了以水文地球化学探矿为目的的现场富集,石墨炉原子吸收光谱测定地质水中痕量金的方法.实验表明;该树脂在〔H^+〕>0.2mol/L的较宽酸度范围内,在最大流速情况下对天然水中痕量金进行富集,测得回收率达98%以上.大部分共存离子不影响金的富集与测定.方法的检出限为0.05ng/L.

The condition for the adsorption of gold by thiourea moldel resin is reported. Through ashing and extracting, trace gold in geology water is determined by graphite furnace atomic absorption spectrometry. The experimental results show that the recovery rate is over 98%. in a wide acid range of [H+] of more than 0. 2 mol/L, most of the coexisting ions do not interfere with the preconcentration and determination of gold, the detection limit of the method is 0. 05 ng/L.