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

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%。

The effects of many kinds of coat metals and modifier on determining Be in water were investigated, and the method, which uses modifier (NH_4)_2H_2 P_O_4 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%.