A novel method has been developed for the rapid separation and determination of 7 nipagin ester preservatives in leather by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) coupled with gel permeation chromatographic (GPC) clean-up. Nipagin ester preservatives in leather were extracted by ultrasonic extraction with methanol. The extract was dried by a rotavapor and purified by GPC, then redissolved in the solvent of methanol-water (1:1, v/v). The chromatographic analysis was performed on an Acquity UPLC? BEH C18 column (50 mm ×2. 1 mm, 1. 7 (μm) with a gradient elution of methanol and water as the mobile phases. The analytes were detected by electrospray ionization (ESI) tandem mass spectrometry with multiple reaction monitoring (MRM) in negative ion mode. Good linearity (r > 0. 99) was observed between 0. 1 and 1. 0 mg/L for all the analytes. The recoveries and relative standard deviations (RSDs) were checked by spiking samples with the 7 nipagin ester preservatives at the three levels of 0. 5, 1.0 and 3. 0 mg/kg. The average recoveries of the 7 nipagin ester preservatives were from (79.44 ±5.67)% to (98.07 ±9.50)%. The precisionvalues expressed as RSD ranged from 4. 24% to 14. 00% (n = 6). The limits of detection were 4 - 12 μLg/kg and the limits of quantification were 13. 2 -39. 6 μg/kg for the analytes. The method is simple, rapid, sensitive and accurate, and suitable for the quantitative determination and confirmation of 7 nipagin ester preservatives in leather.%利用超高效液相色谱-串联质谱(UPLC-MS/MS)结合凝胶渗透色谱(GPC)技术,建立了一种快速分离和测定皮革制品中7种尼泊金酯类防腐剂的分析方法.样品经超声提取、浓缩、GPC净化,甲醇-水溶液(1∶1,v/v)溶解,采用Acquity UPLC(R)BEH C18柱(50 mm×2.1 mm,1.7 μm)分离,以甲醇和水为流动相,梯度洗脱,电喷雾负离子模式电离,采用多反应监测模式检测和外标法定量.该方法在0.1～1.0 mg/L范围内线性关系良好(r＞0.99)；在添加量为0.5～3.0 mg/kg时,平均回收率为(79.44±5.67)％～(98.07±9.50)％,相对标准偏差(RSD)为4.24％～14.00％；方法的检出限(LOD)为4～12μg/kg,定量限(LOQ)为13.2～39.6μg/kg.该方法操作简便、快捷、灵敏、准确,适合皮革中多种尼泊金酯类防腐剂的确证和定量测定.
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