泡塑吸附-原子吸收法测定地质样品中金含量的方法研究  

Study on Determination Method of Gold Mass Fraction in Geological Samples by Foamed Plastic Adsorption-Atomic Absorption Spectrometry

作　　者：孔晓彦 马龙[1] 何媛媛 鲁海妍 张珊珊 KONG Xiao-yan;MA Long;HE Yuan-yuan;LU Hai-yan;ZHANG Shan-shan(Qinghai Province Geological and Mineral Products Testing and Application Center,Xining 810000,China)

机构地区：[1]青海省地质矿产测试应用中心,西宁810000

出　　处：《当代化工》2021年第9期2265-2268,共4页Contemporary Chemical Industry

基　　金：青海学者资助项目(项目编号:青人社厅函[2019]4号);青海省重点研发与转化计划项目(项目编号:2019-SF-139)。

摘　　要：介绍了金在自然界中的存在形式,以及分析前因为其复杂的赋存状态和特殊性质对矿样加工和取样量的要求。阐述了分析测定时王水溶矿、泡塑吸附法的流程和原理,研究了为提高金的吸附率所要控制的条件范围以及注意事项,确定了吸附过程中王水体积分数的最佳控制范围是10%~20%,溶液的温度在吸附前加热到30~40℃,环境温度控制在20~25℃以上。通过对质控样品测定数据的精密度和准确度的计算,其结果均满足《地质矿产实验室测试质量管理规范》的要求,说明本方法条件对分析测试地质样品中的金元素是可行的,并且较活性炭吸附法提高了分析效率。The existence form of gold in nature was described, as well as the requirement about sample processing and sampling amount because it complex occurrence state and special character before analysis. The process and principle of aqua regia and foam plastic adsorption method in the analysis were discussed, the range of conditions and matters needing attention were studied in order to improve the adsorption rate of gold, it was pointed out that the optimum aqur regia volume fraction during adsorption was 10%~20%,the temperature of solution should be heated to 30~40 ℃ before adsorption, and the ambient temperature should be controlled above 20~25 ℃.Through the calculation of accuracy and precision about determination data of quality control samples,the results all met the requirements of The Specification Of Testing Quality Management For Geological Laboratories, showing that the conditions of this method are feasible to analysis of gold in geological samples, and the analysis efficiency is better than activated carbon adsorption.

关 键 词：泡塑吸附 酸度 温度 无臭灰化 

分 类 号：O657[理学—分析化学]