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Improved Method for Determination of Inorganic Arsenic in Rice

ZHAO Hong-bo1, XU Ping2,*, PAN Lei-ming1, JIN Xin1, ZHANG Yi-ning1, XU Rong-nian1   

  1. 1. Zhejiang Gongzheng Testing Center Co. Ltd., Hangzhou 310009, China;
    2. China National Rice Research Institute, Hangzhou 310006, China
  • Online:2014-07-25 Published:2014-08-26
  • Contact: XU Ping

Abstract:

The pretreatment method for the determination of inorganic arsenic using hydride generation atomic fluorescence
spectrometry described the Chinese national standard GB/T 5009.11-2003 “Determination of total arsenic and inorganic
arsenic in foods” was improved. The results indicated that the analytical results for rice samples extracted ultrasonically for
35 min and then allowed to stand for 25 min before injection were not significantly different from those obtained following
the national standard by pairwise t-test (t = 1.37, P > 0.05). The detection limit, linear range, recovery rate and relative
standard deviation of the developed method were 0.015 mg/kg, 0–200 μg/L, and 93.8%–106.0%, respectively. This method is
characteristics of simple and fast operation, less interference and high accuracy so that it is suitable for the determination of
bulk samples in quality inspection.

Key words: rice, pretreatment, ultrasonic-assisted extraction, inorganic arsenic, atomic fluorescence spectrometry

CLC Number: