Determination of lead, cadmium, arsenic, tin and antimony in galvanized film of steel sheet by laser ablation inductively coupled plasma mass spectrometry
JIN Xianzhong 1, CHEN Jianguo 1, XIE Jianmei 2
1.Beilun EntryExit Inspection and Quarantine Bureau，Ningbo 315012，China; 2. China Certification & Inspection Group Ningbo Co., Ltd., Ningbo 315012, China
Abstract：A method has been proposed for the direct determination of lead, cadmium, arsenic, tin and antimony in galvanized film by laser ablation inductively coupled plasma mass spectrometry. In the method, 64Zn was used as internal standard, and calibration curve was fitted by certified reference materials of pure zinc. Based on the research of galvanized film, single point ablation mode and time resolved spectrum for data acquirement of ICP-MS were chosen. After optimizing the operation parameters, evaluation of elemental fractionation was given. For lead and tin, each fractionation factor was close to 1, and for cadmium, arsenic and antimony, their fractionation factors were less than 0.8. So we thought there wasn’t fractionation effect for lead and tin, and there was obvious fractionation effect for cadmium, arsenic and antimony. However, memory effect wasn’t been found. Reference materials and practical sample were analyzed by this method, good agreement achieved between the found levels and the certified values or the results by ICP-MS indicated the proposed method was feasible. The detection limit of lead, cadmium, arsenic, tin and antimony was 3, 0.3, 3, 3 and 0.5μg/g respectively.
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JIN Xianzhong, CHEN Jianguo, XIE Jianmei. Determination of lead, cadmium, arsenic, tin and antimony in galvanized film of steel sheet by laser ablation inductively coupled plasma mass spectrometry. , 2012, 32(3): 1-6.
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