Determination of lead in electrolytic tinplate coating by X-ray fluorescence spectrometryChinese Full Text

HUANG Gang-ming;FAN Chun;TIAN Hui-ling;WANG Jun-xiang;Department of Manufacture and Management,Baosteel Co.,LTD.;Detection Division,Baosteel Engineers and Technicians Co.;

Abstract: By selecting representative electrolytic tinplate samples with different coating mass and different lead content as calibration sample and adopting method regulated by European Union BS EN10333-2005（Steel for packaging-the flat steel products in contact with human and animal food,products and beverages-tinned steel）to determine the lead content in its tin coating,the shortage problem of electrolytic tinplate certified reference materials was solved.Thus,a method for direct determination of lead content in unit tin coating of electrolytic tinplate samples was established by X-ray fluorescence spectrometry.The samples were divided into two layers（substrate layer and tin coating）with film analysis software equipped in the instrument to correct the interference caused by lead in the substrate layer.Fundamental Parameters Method（FP）software equipped in the instrument was used to correct tin interference caused by different unit tin coating mass,so as to the correlation coefficient of the calibration curve reach 0.993.The result indicated the method was suitable for sample with unit tin coating mass more than 2.0g/m2 and substrate thickness more than 0.2mm.The proposed method was applied to the determination of actual electrolytic tinplate samples.The results were consistent with those obtained by European Union BS EN 10333 standard method,and the relative standard deviations（n=6）were 4%-20%.

Keywords：

tinplate; coating; lead; Fundamental Parameters Method; film analysis software; tin;

DOI：
10.13228/j.issn.1000-7571.2014.06.003
Series：
Subject：
Classification Code：
O657.34;TQ153.13

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Determination of lead in electrolytic tinplate coating by X-ray fluorescence spectrometryChinese Full Text

HUANG Gang-ming;FAN Chun;TIAN Hui-ling;WANG Jun-xiang;Department of Manufacture and Management,Baosteel Co.,LTD.;Detection Division,Baosteel Engineers and Technicians Co.;

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