摘要
本文初步探讨了采用超声波使固体样与溶剂形成均匀的固体悬浮液,直接进样石墨炉原子吸收光谱法测定岩石矿物中痕量Ag。对18个国家级标准样品中Ag进行了测试,结果吻合。对含Ag3.2μg/g的GSD-11 标样测定10次,其相对标准偏差为3.06％,方法特征量为1.9pg/0.0044A,测定下限可达0.1ng/ml。
A rapid method for determining trace silver in rocks and minerals by ultrasonic suspended solid sampling-GFAAS is described. Silver contents as determined in 18 national geological standard reference materials agree well with the recommended values. The characteristic mass of the method is 1.9 pg/ 0.0044 A and the detection limit is 0.1 ng/ml. The RSD (n=10) is 3.06% for SRM GSD-11 containing 3.2 μg/g Ag.
出处
《岩矿测试》
CAS
CSCD
北大核心
1991年第4期291-294,共4页
Rock and Mineral Analysis
关键词
银
矿物
测定
石墨炉
原子吸收法
silver determination, ultrasonic suspended solid sampling, graphite furnace atomic absorption spectrometry (GFAAS).
