PDF(Pubmed)
Abstract：
The application of polyesters as food contact materials is an alternative to epoxy resin coatings, which can be a source of endocrine migrants. By using high-pressure liquid chromatography/electrospray ionization-mass spectrometry (HPLC/ESI-MS) with cone voltage-induced fragmentation in-source, a number of polyester-derived migrants were detected in the extracts of inner coatings of metallic cans. The polyester-derived migrants were detected in each inner coating of fish product-containing cans (5/5) and in one inner coating of meat product-containing can (1/5). They were not detected in the inner coatings of vegetable/fruit product-containing cans (10 samples). The respective detected parent and product ions enabled differentiation between cyclic and linear compounds, as well as unambiguous identification of diol and diacid units. Most of the detected compounds, cyclic and linear, were composed of neopentyl glycol as diol and two diacid comonomers, namely isophthalic acid and hexahydrophthalic acid. The other detected oligoesters were composed of neopentyl glycol or propylene glycol and adipic acid/isophthalic acid as comonomers. The compounds containing propylene glycol as diol were found to be exclusively linear cooligoesters. On the basis of abundances of [M+Na]+ ions, the relative contents of cyclic and linear oligoesters were evaluated.
摘要：
聚酯作为食品接触材料的应用是环氧树脂涂料的替代品，这可能是内分泌移民的来源。通过使用高压液相色谱/电喷雾电离质谱（HPLC/ESI-MS），在源中进行锥电压诱导的碎裂，在金属罐内涂层的提取物中检测到许多聚酯衍生的移民。在含鱼产品罐的每个内涂层（5/5）和含肉制品罐的一个内涂层（1/5）中检测到聚酯衍生的迁移。在含有蔬菜/水果产品的罐(10个样品)的内涂层中未检测到它们。各自检测到的母体和产物离子能够区分环状和线性化合物，以及二醇和二酸单元的明确识别。大多数检测到的化合物，环状和线性，由新戊二醇作为二醇和两种二酸共聚单体组成，即间苯二甲酸和六氢邻苯二甲酸。其他检测到的低聚酯由新戊二醇或丙二醇和己二酸/间苯二甲酸作为共聚单体组成。发现含有丙二醇作为二醇的化合物仅是线性的凉皮酯。根据[M+Na]+离子的丰度,评估了环状和线性低聚酯的相对含量。
