流动注射在线液-液萃取原子吸收光谱法测定生物样品中的铅

On Line Determination of Lead in Biological Specimen by Flame Atomic Absorption Spectrometry with Solvent Extraction Flow Injection

本文利用所设计的一种新型流动注射液－液萃取重力分相器，建立了流动注射溶剂萃取原子吸收光谱法测定铅的新方法。详细地研究了流动注射在线萃取的实验条件及流路系统。方法的精密度和检出限分别为２．５％（ｎ＝１１）和２．８μｇ／Ｌ（ｋ＝３）。用拟定的方法测定了峰蛹、粮食等生物样品中的铅，结果与参考值相吻合。

A new method for the determination of lead with a liquid liquid flow extraction system associated with a newly designed phase separator was proposed.Experimental conditions and manifold parameters were investigated in detail.The detection limit was 2.8ng/mL (k=3),and the precision was 2.5% ( n =11).The sample throughput for lead was 45/h.The method was applied to the determination of lead in bee chrysalis and rice with satisfactory results.