Bromothymol Blue as Indicator for Lead Determinatin in Food by Atomic Fluorescence Spectrometry

Abstract

Abstract: A study on effect of acidity in determination of lead in food by hydride-generation atomic fluorescence spectrometry(HG-AFS) was introduced.Instrumental and analytical conditions were optimized.The optimal acidity of the sample solution is 0.18 mol/L.The linear range of the standard curve is 5～40μg/L with the regression coefficient of 0.9999.And the detection limit of this method is found to be 0.15μg/L.The relative standard deviation(RSD) is 0.22 %.The recovery rate is between 98.3 %～104.6 %.The method has been applied to the determination of lead in starch fungi mushrooms etc with satisfactory results.

Key words: bromothymol blue, atomic fluorescence spectrometry(AFS), food, lead

TONG De-Hua, ZHANG Rui-Ping, WANG Yong-Shuang, DOU Xian-Zhong, FAN Dan-Dan. Bromothymol Blue as Indicator for Lead Determinatin in Food by Atomic Fluorescence Spectrometry[J]. FOOD SCIENCE, 2008, 29(5): 358-360.

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Bromothymol Blue as Indicator for Lead Determinatin in Food by Atomic Fluorescence Spectrometry

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