选取4%（体积分数，下同）乙酸溶液、50%（体积分数，下同）乙醇溶液、95%乙醇溶液和橄榄油作为食品模拟物，模拟了食品接触材料在与不同类型食物接触下的迁移行为。采用液相色谱-串联质谱法测定纸质食品接触材料印刷紫外固化油墨中18种光引发剂的迁移量。迁移试验得到的水基食品模拟液，经过滤后直接进样测定；油基食品模拟液需要经乙腈提取后进行测定。以C₁₈色谱柱为分离柱，以不同体积比的0.1%（体积分数）甲酸溶液和0.1%（体积分数）甲酸乙腈溶液的混合液作为流动相进行梯度洗脱，质谱分析采用多反应监测模式对18种光引发剂的定量离子和定性离子进行监测。18种光引发剂的质量浓度均在3.0~37.5 μg·L^-1内或质量分数均在0.010~0.125 mg·kg^-1内与其对应的峰面积呈线性关系，在4%乙酸溶液、50%乙醇溶液、95%乙醇溶液及橄榄油食品模拟物中的测定下限（10S/N）分别为0.03~2.97 μg·L^-1，0.02~2.91 μg·L^-1，0.03~2.88 μg·L^-1和0.06~9.00 ng·g^-1。以空白样品为基体进行加标回收试验，所得回收率为86.0%~114%，测定值的相对标准偏差（n=6）不大于9.4%。

4% (φ, the same below) acetic acid solution, 50% (φ, the same below) alcohol solution, 95% alcohol solution and olive oil were used as food simulants to simulate migration behavior of food contact materials in contact with different types of food. LC-MS/MS was applied to the determination of migration of 18 photoinitiators in food contact paper based materials with printing UV-ink. The aqueous food simulant solution was just filtered through filter before injection, and the oil food simulant solution was extracted by acetonitrile before determination. The solution was separated on C₁₈ chromatographic column using a gradient elution program with the mixture of 0.1% (φ) formic acid solution and 0.1% (φ) formic acid in acetonitrile solution mixed in different ratios as mobile phase. The quantitative and qualitative ions of 18 photoinitiators were monitored by MS with multiple reactions monitoring. Linear relationships between values of peak area and mass concentration or mass fraction of 18 photoinitiators were kept in the same range of 3.0-37.5 μg·L^-1 or 0.010-0.125 mg·kg^-1, with lower limits of determination (10S/N) of 0.03-2.97 μg·L^-1 for 4% acetic acid solution, 0.02-2.91 μg·L^-1 for 50% alcohol solution, 0.03-2.88 μg·L^-1 for 95% alcohol solution and 0.06-9.00 ng·g^-1 for olive oil, respectively. On the base of blank sample, test for recovery was made by standard addition method; values of recovery found were in the range of 86.0%-114%, with RSDs (n=6) of determined values no more than 9.4%.