砂金中Pb同位素μ值的测定  

Determination of value μ of Pb isotope in alluvial gold

作　　者：王铁夫[1] 周燕[1] 张延洁[1] 郑培玺[1] 

机构地区：[1]吉林大学测试科学实验中心

出　　处：《黄金》2006年第10期46-49,共4页Gold

摘　　要：砂金中的微量铅同位素分析测定具有特殊的意义。文中测试了珲春河流域、嫩江流域、黑龙江流域的砂金及附近岩石和矿物Pb同位素,为寻找原始金矿和岩体及确定砂金来源提供了极其重要的同位素地质依据。砂金中微量铅的化学分离是采用阴离子交换和阳离子交换技术,以甲醇作为载体进行砂金中微量铅的富集、分离纯化,使铅与金完全分离,以达到高精度和准确测定铅同位素的μ值(238U/204Pb)。The isotope analysis of trace lead in alluvial gold has special meaning. The lead isotopes in the alluvial gold as well as rocks and minerals in the rivers of Hunchun, Nenjiang and Heilongjiang were determined, providing very important isotopic geological data for locating original gold deposit and defining source of alluvial gold. The sepa- ration of trace Pb in alluvial gold was carried out by anion exchange and cation exchange, where the enrichment, sep- aration and purification of Pb were carried out with methanol the carrier, so as to completely separate Pb from gold and enable a precise and accurate determination of vale μ （^238 U/^204 Pb） of Pb isotope.

关 键 词：砂金 阴离子交换 阳离子交换 铅同位素 

分 类 号：O657.63[理学—分析化学]