微波灰化-原子荧光光谱法测定植物油中的砷

Determination of Arsenic in Vegetable Oil by Atomic Fluorecences Spectrometry after Microwave Ashing

本文对植物油中砷的测定方法进行了研究。采用微波灰化对植物油进行前处理,用氢化物原子荧光光谱法对植物油进行测定。探讨了微波灰化条件对砷测定的影响,研究了样品酸度和还原剂浓度对氢化物发生的影响。砷的检出限可达0.2ng/mL,相对标准偏差为0.96%～2.75%,回收率为84%～102%。

A method for the determination of arsenic in vegetable oil was propesed. Microwave ashing was used for the pre-treatment of vegetable oil and hydride generation atomic fluorescence spectrometry was employed for the further determination. The fuctors affecting the microware ashing and the hydride generation were studied and the optimal experimental conditions were established. The detertion limit of As was 0.2 ng/mL with the relative standard deviations of 0.96%～2.75%. The recovery was in the range of 84%～102%.