目的 利用气相色谱-质谱联用法测定食品接触耐高温材料中氯苯类物质（氯苯、对二氯苯等）的迁移量。方法 从水基、酸性、醇类、油基等食品模拟物的迁移试验中得到的样品，通过正己烷或甲醇等有机溶剂萃取后，提取液中的氯苯类物质经由键合聚乙二醇的毛细管柱分离，最终在质谱中进行检测分析。结果 在优化萃取溶剂、色谱柱等检测条件下，该方法可有效测定食品模拟物中氯苯、对二氯苯等物质的迁移量，在0.05~50 mg/kg（水性模拟物）或0.2~50 mg/kg（油性模拟物）的范围内线性良好，检出限可达到0.02 mg/kg（水性模拟物）或0.1 mg/kg（油性模拟物），回收率在87.6%~113.2%之间，相对标准偏差小于10%（n=6）。结论 建立了食品接触材料中氯苯和对二氯苯迁移量的气相色谱-质谱联用方法，该方法简单、快捷、准确，满足了食品接触材料中氯苯类物质日常检验的要求。

The paper aims to measure the migration of chlorinated benzenes (chlorobenzene, p-dichlorobenzene, etc.) in thermostable food contact materials by gas chromatography-mass spectrometry. Samples obtained in migration tests in water-based, acidic, alcoholic or oil-based food simulants were extracted by certain solvents, like n-hexane or methanol. Chlorinated benzenes in the solvents were then separated by capillary column bonded with polyethylene glycol, and finally tested and analyzed by mass spectrometry. Under the optimized conditions such as extracted solvent and chromatographic column, migration of chlorobenzene, p-dichlorobenzene, etc. in food simulants can be effectively determined. The method had good linearity within the mass concentration range of 0.05-50 mg/kg (water-based simulant) or 0.2-50 mg/kg (oil-based simulant). The detection limit reached 0.02-0.1 mg/kg (water-based simulant) or 0.1 mg/kg (oil-based simulant). The recovery rate ranged from 87.6% to 113.2%. And the relative standard deviation was less than 10% (n=6). The established gas chromatography-mass spectrometry method for chlorobenzene and p-dichlorobenzene is simple, rapid and accurate. It can satisfy the requirements on inspection of chlorinated benzenes in food contact materials.