Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, Jilin Province 130024, PR China.
Analyst. 2020 Mar 21;145(6):2286-2296. doi: 10.1039/c9an02331c. Epub 2020 Jan 31.
The determination of trace-amount organotins in plastic food packaging materials is of great significance in food safety. However, due to the complexity of organotins and sample treatment processes, it is still a challenging task. Here, we report a method for the sensitive and simultaneous determination of organotins in plastic food packaging materials and edible oils, by utilizing sheathless capillary electrophoresis-electrospray ionization-mass spectrometry. The method of sample pretreatment with ultrasonic extraction and solid phase extraction is used to eliminate interference. The results showed low limits of detection (LODs) of 2 pg mL-50 pg mL and excellent inter/intra-day repeatability. Good average recoveries in the range of 80.27% to 108.52% were obtained at three spiked concentrations, with a relative standard deviation less than 8.71%. The successful simultaneous determination of the target analytes will pave the way for further assessment of contamination and migration behaviour of organotins from packaging materials to food, which is of great significance for evaluating and controlling food safety.
痕量有机锡在塑料食品包装材料中的测定对食品安全具有重要意义。然而，由于有机锡的复杂性和样品处理过程的复杂性，这仍然是一项具有挑战性的任务。在这里，我们报告了一种利用无鞘毛细管电泳-电喷雾电离-质谱法灵敏、同时测定塑料食品包装材料和食用油中有机锡的方法。采用超声提取和固相萃取相结合的样品预处理方法消除干扰。结果表明，检测限（LOD）低至 2 pg mL-50 pg mL，日内和日间重复性好。在三个加标浓度下，平均回收率在 80.27%至 108.52%之间，相对标准偏差小于 8.71%。目标分析物的成功同时测定为进一步评估包装材料中有机锡向食品的污染和迁移行为铺平了道路，这对于评估和控制食品安全具有重要意义。
