岩矿测试Issue(4)：459-463,5.DOI:10.15898/j.cnki.11-2131/td.2015.04.014
巯基棉富集-分光光度法测定地球化学样品中铂钯的野外快速分析方法研究
Field Rapid Determination of Platinum and Palladium in Geochemical Samples by Spectrophotometry with Sulfhydryl Cotton Enrichment
摘要
Abstract
For the determination of Pt and Pd in geochemical samples,traditional and modern analytical methods are based on assaying or activated carbon and resin preconcentration and determination by Spectrophotometry and Inductively Coupled Plasma-Mass Spectrometry. However,these requirements cannot be met in the field. Based on the character of samples and the applicability of Spectrophotometry, this study develops a method in rapid determination of Pt and Pd in geochemical samples in the field. Samples are decomposed in the sealed Teflon container by the mixing of hydrochloric acid,potassium chlorate,sodium chloride,and ammonium hydrogen fluoride under normal temperature and pressure. Platinum and palladium are preconcentrated by sulfhydryl cotton. Pt and Pd are determined using chloroform petroleum and ether( 1 : 3 ) as the extractant,and DDO as the chromogenic agent. The adsorption capacity of sulfhydryl cotton for Pt can reach 98%,and the adsorption capacity of stannous chloride-drazine hydrate( reducing agent )for Pd can reach 99%. The detection limits of the method are 0. 05 μg/g and 0. 02 μg/g for Pt and Pd,respectively. The analytical values of standard materials, GBW07291,GBW07293,and GBW07341 are consistent with the respectively recommended values. The direct determination values of geological samples in the field are consistent with the results of laboratory analyses.关键词
地球化学样品/铂/钯/野外分析/巯基棉富集/分光光度法Key words
geo-chemical samples/platinum/palladium/field analysis/sulfhydryl cotton preconcentraction/Spectrophotometry分类
化学化工引用本文复制引用
王烨,孙爱琴,李志伟..巯基棉富集-分光光度法测定地球化学样品中铂钯的野外快速分析方法研究[J].岩矿测试,2015,(4):459-463,5.基金项目
国土资源地质大调查现代实验测试技术方法研究项目 （）
