Food and Fermentation Industries >

2023 , Vol. 49 >Issue 14: 265 - 271

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.032871

Simple and rapid determination of trace cadmium in rice by miniature hydride generation atomic fluorescence spectrometry

  • LI Xianyu ,
  • LUO Mingbiao ,
  • WANG Weimin ,
  • CHENG Xuemeng ,
  • ZENG Kai ,
  • DONG Yunya ,
  • YANG Mei
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  • 1(Jiangxi Province Key Laboratory of Synthetic Chemistry, East China University of Technology, Nanchang 330013, China)
    2(State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants, Changsha 410019, China)
    3(Chongqing Mintai New Agrotech Development Group Co.Ltd., Chongqing 400060, China)

Received date: 2022-07-06

  Revised date: 2022-09-07

  Online published: 2023-08-30

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Abstract

An ultrasound-assisted dilute acid extraction method for the simple, rapid and accurate determination of trace cadmium (Cd) in rice was established based on the self-developed miniature hydride generation atomic fluorescence spectrometer. The best auxiliary extraction way was obtained by comparing the stability of four auxiliary extraction ways, including ultrasonication, centrifugation, shaking, and resting. The effects of ultrasonic time, ultrasonic power, hydrochloric acid concentration, thiourea concentration, and cadmium sensitizer concentration on the extraction of cadmium were investigated by single-factor experiments to obtain the optimal extraction conditions. Results showed that ultrasound-assisted extraction had the best way and stability. The optimal extraction conditions were as follows: sonication time of 10 min, sonication power of 80%, hydrochloric acid concentration of 4% (volume ratio), thiourea concentration of 5.0 g/L, and cadmium sensitizer concentration of 2.5 g/L. After optimization, the linearity of Cd was good in the range of 0.05-0.25 ng/mL, and the correlation coefficient was 0.999 8. The detection limit of the method was 0.000 61 mg/kg, the recovery rate was 93.3%-106.7%, and the relative standard deviation was 1.62%-4.06%. The method was verified by rice standard substances GSB-1 and GSB-22, and the results were accurate and reliable. Compared with the traditional method, the method has simple pretreatment, short time consumption, and accurate determination, and is suitable for the determination of trace cadmium in rice.

Key words： independent development; miniature hydride generation atomic fluorescence spectrometer; quick; cadmium; rice; ultrasonic

Cite this article

LI Xianyu , LUO Mingbiao , WANG Weimin , CHENG Xuemeng , ZENG Kai , DONG Yunya , YANG Mei . Simple and rapid determination of trace cadmium in rice by miniature hydride generation atomic fluorescence spectrometry[J]. Food and Fermentation Industries, 2023 , 49(14) : 265 -271 . DOI: 10.13995/j.cnki.11-1802/ts.032871

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