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| Determination of Lead, Cadmium, Arsenic and Chromium in wheat flour by microwave digestion and inductively coupled plasma mass spectrometry |
| Received:February 17, 2022 Revised:February 21, 2022 |
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| DOI：doi:10.3969/j.issn.2095-1035.2022.03.004 |
| KeyWord:Lead(Pb), Cadmium(Cd), Arsenic(As) and Chromium(Cr); inductively coupled plasma mass spectrometry(ICP-MS); wheat flour; microwave digestion; food contaminants |
| Author | Institution |
| LIU Shuping |
甘肃省计量研究院 |
| QIAO Jihao |
甘肃省计量研究院 |
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| Abstract: |
| In some parts of China, soil and water resources are polluted with different degrees for lead, cadmium, arsenic and chromium. These toxic and harmful elements in soil and water enter the human body through the food chain, causing great harm to people''s health. Therefore, it is necessary to accurately and efficiently quantify these limited elements in food. In this paper, microwave digestion and inductively coupled plasma mass spectrometry(ICP-MS) were stablished to measure Pb, Cd, As and Cr in wheat flour. The internal standard method was adopted, Rh, In and Bi were selected as the internal standard elements. In addition, the pretreatment method of microwave digestion nd the instrument conditions were optimized. The detection method was quick and simple. The working standard curves show a good linear relationship with correlation coefficients greater than 0.9999. GBW(E)100493 and Wheat Flour SRM 1567B were used to verify the method used in this experiment. The results showed that the measured values were consistent with the standard values, indicating that the method used in this experiment is reliable for the determination of Pb, Cd, As and Cr in Wheat Flour. |
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