涂层石墨管原子吸收法测定水中痕量铍

Determining Trace Beryllium in Water by the Coated Graphite Tube Atomic Absorpti

摘要: 比较了多种涂层金属和基体改进剂对测定水中铍的影响,建立了涂镧石墨管结合基体改进剂(磷酸二氢铵)测定水中痕量铍的方法。该方法最低检出限为0.037 μg/L,相对标准偏差为7.4%,回收率为98%～106%。

Abstract: The effects of many kinds of coat metals and modifier on determining Be in water were investigated, and the method, which uses modifier （NH4）2H2 PO4 and graphite tube with La coated to determine Be in water, was established. In this method, the lowest detection limit is 0. 037 μg/L, the relevant precision is 7.4%, and the recovery ratio is 98%～106%.