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目的:建立同时检测食品包装材料中24种邻苯二甲酸酯类化合物的气相色谱质谱法(GC-MS)分析方法。方法:用正己烷提取包装材料,GC-MS选择离子监测模式(SIM)测定,运用气质联用仪测定24种邻苯二甲酸酯类物质。结果:24种邻苯二甲酸酯类物质的线性范围为0.05 mg/L~10 mg/L,除了邻苯二甲酸二异壬酯(DINP)和邻苯二甲酸二异癸酯(DIDP)为0.5 mg/L~10 mg/L,相关系数(r2)除DINP、DIDP外均大于0.99,方法的检出限(信噪比为3)为0.002 mg/kg~0.05 mg/kg,在食品包装材料基质中3个加标水平的平均回收率为85.2%~108%,相对标准偏差(RSD,n=6)为5.9%~10.2%。结论:该方法快速、灵敏、准确可靠,适用于食品包装材料中邻苯二甲酸酯类化合物的分析检测。
Objective: To establish a gas chromatography-mass spectrometry (GC-MS) method for simultaneous determination of 24 phthalates in food packaging materials. Methods: The packing materials were extracted with n-hexane, GC-MS selective ion monitoring mode (SIM) and 24 kinds of phthalates were detected by gas chromatography-mass spectrometry. Results: The linear range of 24 phthalates was 0.05 mg / L ~ 10 mg / L, except for di-isononyl phthalate (DINP) and diisodecyl phthalate (DIDP) 0.5 mg / L ~ 10 mg / L, the correlation coefficient (r2) was greater than 0.99 except DINP and DIDP, and the detection limit (signal to noise ratio of 3) was 0.002 mg / The average recoveries of three spiked levels in the material matrix ranged from 85.2% to 108% with relative standard deviations (RSD, n = 6) of 5.9% to 10.2%. Conclusion: The method is rapid, sensitive, accurate and reliable and is suitable for the analysis and detection of phthalates in food packaging materials.