GUIA Group, Department of Analytical Chemistry, University of Zaragoza, I3A María de Luna, 3, 50018 Zaragoza, Spain.
Waters Corporation, Wilmslow SK9 4AX, United Kingdom.
Food Chem. 2021 Jul 15;350:129260. doi: 10.1016/j.foodchem.2021.129260. Epub 2021 Feb 10.
Oligomers, are, in general, unknown components of the polymer. These oligomers can migrate from the polymer into the food and become a non-intentionally added substance to the food. In this work, ion mobility time-of-flight mass spectrometry has been used to identify oligomers migrating from kitchenware. The structure elucidation of oligomers from polyamide 6 and polyamide 66 was achieved through the analysis of accurate m/z values of adducts and collision cross section values of precursor ions together with high-energy fragmentation patterns. Additionally, a method to extract oligomers from sunflower oil, cooked beans, soup and whole milk has been developed. Extraction recoveries ranged from 87 to 102% and limits of detection were from 0.03 to 0.11 mg/kg. It was observed that the migration from kitchenware to real food was below the specified migration limit of 5 mg/kg. However, this limit was exceeded for food simulants, which therefore overestimated the oligomer migration.
低聚物通常是聚合物中未知的成分。这些低聚物可以从聚合物迁移到食物中，并成为食物中的非故意添加物质。在这项工作中，离子淌度飞行时间质谱已被用于鉴定从厨具中迁移出的低聚物。通过分析加合物的准确 m/z 值和前体离子的碰撞截面值以及高能碎裂模式，实现了对聚酰胺 6 和聚酰胺 66 低聚物的结构阐明。此外，还开发了一种从葵花籽油、煮豆、汤和全脂牛奶中提取低聚物的方法。提取回收率在 87%至 102%之间，检测限在 0.03 至 0.11 毫克/千克之间。观察到厨具向实际食物的迁移低于规定的 5 毫克/千克的迁移限量。然而，对于食品模拟物，这个限量被超过了，因此高估了低聚物的迁移。
