样品经水、4%（体积分数）乙酸溶液、20%（体积分数）乙醇溶液、50%（体积分数）乙醇溶液等4种食品模拟物浸泡后，浸泡液用0.45 μm滤膜过滤。采用Agilent Eclipse XDB-C₁₈色谱柱（250 mm×4.6 mm，5 μm）分离待测物，以乙腈-水混合液为流动相进行梯度洗脱，采用二极管阵列检测器分别在259，228，247 nm处测定双酚S、双酚A和4，4'-二氯二苯砜。双酚S、双酚A和4，4'-二氯二苯砜的线性范围均为0.02~5.0 mg·L^-1，检出限（3S/N）分别为0.01，0.02，0.01 mg·L^-1。加标回收率在89.6%~103%之间，测定值的相对标准偏差（n=6）在0.84%~3.2%之间。

After immersion of samples in 4 kinds of food stimulants, including water, 4% (φ) acetic acid solution, 20% (φ) ethanol soltuion and 50% (φ) ethanol soltuion, the immersion solutions were filtrated through 0.45 μm membrane. The analytes were separated on an Agilent Eclipse XDB-C₁₈ column (250 mm×4.6 mm, 5 μm), with a mixture of acetonitrile and water as the mobile phase for gradient elution. Diode array detector was used for detection, with the wavelengths at 259, 228, 247 nm for bisphenol S, bisphenol A and 4,4'-dichlorodiphenyl sulfone, respectively. The linearity ranges of bisphenol S, bisphenol A and 4,4'-dichlorodiphenyl sulfone were same of 0.02-5.0 mg·L^-1 and the detection limits (3S/N) were 0.01, 0.02, 0.01 mg·L^-1, respectively. Recovery rates obtained by standard addition method were in the range of 89.6%-103% and RSDs (n=6) were in the range of 0.84%-3.2%.