| 光谱学与光谱分析 |
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| Determination of Heavy Metals in Ceramic Food Packaging Containers by ICP-MS |
| DONG Zhan-hua1, LU Li-xin1, 2*, LIU Zhi-gang1, 2 |
1. Department of Packaging Engineering, Jiangnan University, Wuxi 214122, China
2. China National Control and Test Center for Packaging Quality, Wuxi 214122, China |
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Abstract The direct determination method of heavy metals, Pb, Cd, Cr, Co, Ni, Zn, As and Sb in food packaging ceramics was studied by using inductive coupled plasma mass spectrometry (ICP-MS). Factors influencing the determination were also studied in detail. By choosing the optional operating parameters and appropriate isotopes of the element to be detected, the influence of mass spectrometry interference was conquered effectively. The detection limits were 0.023 μg·L -1 for Pb, 0.004 μg·L -1 for Cd, 0.030 μg·L -1 for Cr, 0.025 μg·L -1 for Ni, 0.012 μg·L -1 for Sb, 0.180 μg·L -1 for Zn, 0.017 μg·L -1 for As, and 0.002 μg·L -1 for Co. The recovery rates of the method were between 95.8% and 104.4%. The RSDs were between 1.1% and 3.3%. The method was simple, rapid, precise, convenient and suitable for daily inspection of import and export ceramic ware.
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Received: 2012-04-23
Accepted: 2012-08-02
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Corresponding Authors:
LU Li-xin
E-mail: lulx@jiangnan.edu.cn
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