The proficiency testing program was designed and organized,to evaluate the testing ability of food contact material testing institutions on lead,and promote the testing capability of participating laboratories.Kraft paper for food contact was used as sample,Robust statistical analysis was conducted on the determination results of participating laboratories,and the laboratory's ability to determine lead was evaluated by Z score.The results of 35 out of 36 laboratories were satisfactory,reaching a satisfaction rate of 97.2％,The result of 1 laboratory was not satisfactory.There was no significant difference a-mong the test results of ICP-OES,GFAAS and ICP-MS.
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