目的 建立基于电感耦合等离子质谱(ICP-MS)技术的总有机锡迁移量分析方法，用于食品接触材料中总有机锡的快速筛查。方法 使用四氢呋喃溶解法筛选出添加有机锡类热稳定剂的试样，采用水和体积分数为4%的乙酸模拟物进行迁移试验，迁移温度为20 ℃和40 ℃，迁移时间为10 d，同时比较常规浸泡迁移和超声加速迁移的结果，对检测方法的精密度、准确度进行了确认。结果 总有机锡迁移测定方法在质量浓度为0.13~13 μg/L时呈良好的线性关系，采用体积分数为4%的乙酸模拟物迁移的检出限为0.011 μg/L，定量限为0.033 μg/L;水模拟物迁移的检出限为0.0097 μg/L，定量限为0.029 μg/L。总有机锡加标回收率范围为98.1%~109.9%，相对标准偏差(RSD)<4.5%。结论 此方法具有灵敏度高、选择性好和准确性高等特点，适用于PVC包装材料中总有机锡迁移量快速分析。

The work aims to establish a method for determination of total organotin migration based on inductively coupled plasma mass spectrometry (ICP-MS) technology, and use it in rapid screening of total organotin in food contact materials. The tetrahydrofuran dissolution method was used to screen out the samples added with organictin heat stabilizers. Water and 4% acetic acid simulants were used for migration test at 20 ℃ and 40 ℃ for 10 d. The results of conventional immersion migration and ultrasonic acceleration migration were compared. The precision and the accuracy of the detection method were confirmed. The total organotin migration measurement method had a good linear correlation at concentration of 0.13-13 μg/L. The limit of detection of migration using 4% acetic acid simulant was 0.011 μg/L, and the limit of quantification was 0.033 μg/L; The limit of detection of migration using water simulant was 0.0097 μg/L, and the limit of quantification was 0.029 μg/L. The adding standard recovery of total organotin was 98.1%-109.9% and the relative standard deviation (RSD) was less than 4.5%. The proposed method has high sensitivity, high selectivity and accuracy. It is suitable for rapid analysis of total organotin migration in PVC packaging materials.