目的 利用气相色谱-质谱联用(GC-MS)法进行纸质包装中4种二苯甲酮类物质的测定。方法 优化超声提取纸质包装材料中二苯甲酮类光引发剂的方法，提取液使用GC-MS进行分析，采用全扫描和离子扫描方式确认每个物质的定性和定量离子。验证该方法的检出限、定量限、线性范围、相对标准偏差和回收率后用于实际样品的分析。结果 得到优化后的超声提取条件，乙腈作为提取溶剂，超声提取2次，每次提取时间为20 min。4种二苯甲酮类物质的检出限为0.01~0.05 mg/L，定量限为0.02~0.10 mg/L，标准添加实验的结果显示，相对标准偏差为2.0%~2.6%，回收率为98%~105%。结论 该方法检出限和定量限均较低，精密度和准确度较高，适合于实际纸质包装样品中4种二苯甲酮类物质的分析。

The work aims to determine the 4 kinds of benzophenones in paper packaging materials by GC-MS. The ultrasonic extraction method of benzophenone photoinitiators from paper packaging materials was optimized. The extract was then analyzed by GC-MS. Full scan and selected ion scan were used for the qualitative and quantitative analysis of each compound. The detection limits, quantification limits, linear ranges, relative standard deviations and recoveries of the established method were verified before the application in the real samples. The optimized ultrasonic extraction conditions were as follows:acetonitrile as extraction solvent, ultrasonic extraction twice and each extraction time of 20 min. The detection limits of 4 kinds of benzophenones were between 0.01-0.05 mg/L. The quantification limits were between 0.02-0.10 mg/L. Standard addition experiments showed that the relative standard deviations were between 2.0%-2.6% and recoveries between 98%-105%. The method, with low detection and quantification limits and relative standard deviations and high recoveries, is suitable for the analysis of 4 kinds of benzophenones in real paper packaging samples.