FOOD SCIENCE
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YAN Na,ZHAO Sheng-guo,GAO Yun-yun
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Abstract:
Digestion with dillute nitric acid followed by inductively coupled plasma-mass spectrometry (ICP-MS) with dynamic reaction cell (DRC) was used to determine the levels of cadmium, mercury, lead and chromium in alcoholic drinks. The optimal levels of nitric acid concentration (volume fraction), temperature, time and sample dilution factor for the digestion process were found to be 50%, 95 ℃, 1 h and 5, respectively. Further investigations were also carried out into reduction of matrix interferences, eliminiation of mercury adsorption and optimization of instrumental conditions. The contents of cadmium, mercury, lead, chromium in red wine, white wine, liquor, beer and rice wine was determined by the presented method. The limits of detection for cadmium, mercury, lead, chromium were found to be 0.01, 0.01, 0.08 μg/L, and 0.03 μg/L, respectively. The precision of this method was in the range of 0.48% to 12.87% (RSD), and recovery rates ranged from 89.6% to 106.5%. This method was efficient, sensitive, accurate and suitable for large-scale determination.
Key words: dynamic reaction cell, inductively coupled plasma-mass spectrometry (ICP-MS), cadmium, mercury, lead, chromium, alcoholic drinks
YAN Na,ZHAO Sheng-guo,GAO Yun-yun. Determination of Cadmium, Mercury, Lead and Chromium in Alcoholic Drinks by Inductively Coupled Plasma-Mass Spectrometry with Dynamic Reaction Cell[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201312062.
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URL: https://www.spkx.net.cn/EN/10.7506/spkx1002-6630-201312062
https://www.spkx.net.cn/EN/Y2013/V34/I12/300