FOOD SCIENCE ›› 2014, Vol. 35 ›› Issue (4): 151-154.doi: 10.7506/spkx1002-6630-201404031

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Determination of Arsenic, Mercury and Lead in Radix Puerariae by Atomic Florescence Spectrophotometry with Wet Digestion

YE Hui-xuan1, TAN Zhou2, LIU Xiang-qian1,*, ZHOU Bin-wen2, XIONG Li-fu3   

  1. 1. Modernization Laboratory of Traditional Chinese Medicine and Drug, College of Pharmacy, Hunan University of Traditional
    Chinese Medicine, Changsha 410208, China; 2. Ri Cheng Sheng Food Additive Factory in Yuhua District of Changsha,
    Changsha 410014, China; 3. Pueraria Engineering Research Center, Changsha 410000, China
  • Received:2013-09-18 Revised:2014-01-16 Online:2014-02-25 Published:2014-03-17
  • Contact: Xiang-Qian LIU E-mail:lxq0001cn@163.com

Abstract:

A method for determination of the contents of heavy metals including As, Hg and Pb in 3 batches of Radix
Puerariae (Pueraria thomsonii Benth cultivar “Xiangge No.1” grown in Hunan province harvested at different times) was
developed using atomic fluorescence spectrophotometry in combination with wet digestion. Samples were wet digested by
nitric acid and perchloric acid and then detected by hydride generation atomic florescence spectrophotometry. The linear
ranges for As, Hg and Pb were 0-16.0, 0-5.0 and 0-40.0 ng/mL, respectively, with correlation coefficients of 0.999 9,
0.999 0 and 0.999 7, respectively. Their limits of detection were 0.050, 0.012 and 0.038 μg/L (n = 11), respectively. Their
recovery rates were 98.73%, 101.22% and 99.43% (n = 6), respectively. This method allows simple, fast and accurate
determination of As, Hg and Pb in Radix Puerariae.

Key words: wet digestion, atomic fluorescence spectrophotometry, Pueraria thomsonii Benth cultivar “Xiangge No.1”, As, Hg, Pb

CLC Number: