摘要
钨在各类岩石中的平均含量较低,一般为0.1—1ppm。为了满足地球化学研究的需要,测定下限通常需低于1ppm。这样的分析下限只有用活化分析法,或其它化学预富集测定法才能达到。原子发射光谱法直接测定地质样品中钨的主要困难是测定下限不足。
The literature about the application of chlorination and sulfuration to lower the detection limit of tungsten by AES was reviewed in detail.It was concluded that an effective measure is to make full use the of thermochemical reaction the cave of graphite electrode.
出处
《岩矿测试》
CAS
1988年第2期152-154,共3页
Rock and Mineral Analysis
