Citation:
LIU Jiang-Hui, XIE Shou-Xin, HU Si, XIE Xiang-Na, XIE Yu-Shan. Determination of Chromium in Cosmetics by ICP-MS[J]. Chinese Journal of Applied Chemistry,
;2007, 24(11): 1340-1342.
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A method was established for the determination of trace Cr in different cosmetic substrates by inductively coupled plasma-mass spectroscopy(ICP-MS). The sample was prepared by microwave digesting in HNO3-H2O2. Comparison research on the dosage of digesting reagent for five different cosmetic substrates was carried out. The working parameters of ICP-MS were optimized, and the matrix effect and the mass interferences were inspected; 52Cr and 53Cr were selected as the target isotopes, 72Ge as the internal standard element, and the influence due to matrix effect were compensated effectively. The experiments showed that the analysis results based on 52Cr and 53Cr was not obvious different, which satisfies the determination of Cr in cosmetics. Standard reference samples were analyzed, with the Cr concentration range of 0.1~100 μg/L. The correlation coefficient was 0.999 9, and with 0.5 mg/kg Cr doped, the average rate of recovery was around 85.3%~104%. The relative standard deviations(RSD) were 1.5%~7.3%, the detection limit of 52Cr 0.052 μg/kg, and the detection limit of 53Cr 0.036 μg/kg.
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