人血、唾液及尿中锂的原子吸收法测定

AAS DETERMINATION OF LITHIUM IN HUMAN BLOOD, SALIVA AND URINE

本文研究了人血、唾液及尿中锂的测定.对人血灰化条件作了探讨,采用灰化辅助剂硫酸以提高锂的回收率,并对直接测定法与标准加入法作了比较,本文C.V。小于3.2%,标准加入回收率在98.2～105%之间,适用于精神病治疗中锂的临床分析。

In this papar, the influence of conditions which human blood, saliva and urine is ashed with dry process on determination of lithium has been investigated. By selecting conditions suitable to ashing and adopting H_2SO_4 to assist ashing, the recovery ratio of lithium has been increased. The infuence of twenty-one sorts of ions on determination also has been studied. The direct and standard addition determinations have been applied to determine lithium in human blood, saliva and urine under the selected conditions, the results are in good agreement with that of both methods. The method of ashing here is simple and the result satisfying. Also, it is suitable for clinical analysis of pychiatry.