氫化物發(fā)生原子熒光光譜法測(cè)定大米粉中的砷元素

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摘 要：本文采用氫化物發(fā)生原子熒光光譜法測(cè)定大米粉中的砷元素。結(jié)果表明，砷在0～20.0 ng·mL-1線性關(guān)系良好，儀器的檢出限為0.18 ng，方法的精密度（RSD，n=7）為1.5%，回收率為93%～106%，測(cè)定值與標(biāo)準(zhǔn)值十分接近。

關(guān)鍵詞：原子熒光光譜法；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

砷是一種重要的非金屬元素，砷及其化合物在自然界分布廣泛，對(duì)人體有極強(qiáng)的致癌作用，中毒劑量是0.010～0.052 g·kg-1，致死量為0.06～

0.20 g·kg-1[1]。（剩余4486字）