氢化物发生原子荧光光谱法测定大米粉中的砷元素

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摘 要：本文采用氢化物发生原子荧光光谱法测定大米粉中的砷元素。结果表明，砷在0～20.0 ng·mL-1线性关系良好，仪器的检出限为0.18 ng，方法的精密度（RSD，n=7）为1.5%，回收率为93%～106%，测定值与标准值十分接近。

关键词：原子荧光光谱法；砷；大米粉

Determination of Arsenic in Rice Flour by Hydride Generation Atomic Fluorescence Spectroscopy

TIAN Cui， XU Shuilian， YANG Xuelian

（Qingcheng County Food and Drug Testing Center， Qingcheng 745100， China）

Abstract： The determination of arsenic in rice flour by hydride generation atomic fluorescence spectrometry was studied. The results showed that the linear relationship of arsenic was good between 0 ng·mL-1 and 20.0 ng·mL-1， with a detection limit of 0.18 ng for the instrument. The precision of the method （RSD， n=7） was 1.5%， and the recovery rate was 93% ～ 106%. The measured value was very close to the standard value.

Keywords： atomic fluorescence spectrometry; arsenic; rice flour

砷是一种重要的非金属元素，砷及其化合物在自然界分布广泛，对人体有极强的致癌作用，中毒剂量是0.010～0.052 g·kg-1，致死量为0.06～

0.20 g·kg-1[1]。（剩余4486字）