期刊
FOOD CHEMISTRY
卷 124, 期 3, 页码 1185-1188出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2010.07.033
关键词
Multi-channel atomic fluorescence spectrometry; Arsenic; Bismuth; Tellurium; Selenium; Simultaneous determination
A novel, rapid and sensitive method for the simultaneous multi-channel hydride generation atomic fluorescence spectrometry (HG-AFS) determination of total arsenic (As), total bismuth (Bi), total tellurium (Te) and total selenium (Se) in tea leaves was proposed. The operating parameters of self-made multi-channel HG-AFS were optimised, including negative high voltage of photo multiplier tube (PMT), the flow rates of carrier and shield gas, observation height and lamp currents. The conditions of hydride generation for As, Bi, Te and Se were studied in details. Under optimal conditions, the method detection limits (MDL) for As, Bi, Te and Se in tea leaves were 0.0152 mu g g(-1), 0.0080 mu g g(-1), 0.0022 mu g g(-1) and 0.0068 mu g g(-1), respectively. The proposed method was successfully applied to the simultaneous determination of As, Bi, Te and Se in various tea leaves and the spike recoveries were in the range of 90-103%. The accuracy of method was validated by analysing a tea certified reference material. The obtained values were consistent with the certified ones. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据