Dopico-García M S, López-Vilariñó J M, Gonzalez-Rodríguez M V
Laboratorio de Química, Centro de Investigacións Tecnolóxicas, Universidad de A Coruña, Campus de Esteiro s/n, 15403 Ferrol, Spain.
J Agric Food Chem. 2007 Apr 18;55(8):3225-31. doi: 10.1021/jf070102+. Epub 2007 Mar 24.
Antioxidants commonly used in polyolefins were studied in commercial food packages made of low- and high-density polyethylene (LDPE and HDPE), polypropylene (PP), polyvinylchloride (PVC), and polyethylene terephtalate (PET) and in a LDPE film extruded at the laboratory. The phenolic antioxidants BHA, BHT, AO 2246, AO 425, Ethanox 330, Irganox 1010, and Irganox 1076 were studied together with the phosphite Irgafos 168 and their two degradation products, phosphate and DBP. Antioxidants were extracted from polyolefins using microwave energy and analyzed using high-performance liquid chromatography (HPLC) to determine the antioxidant content in the diverse commercial films. Irganox 1010 and Irganox 1076 were found in the majority of the samples generally together with the phosphite Irgafos 168 and its oxidized product (phosphate). Specific migration levels of each antioxidant were determined by HPLC after pretreatment with solid-phase extraction (SPE) in aqueous food simulants and after their dilution with tetrahydrofuran (THF) in fatty food simulant. These levels were much lower than limits allowed by legislation.
对聚烯烃中常用的抗氧化剂进行了研究，这些抗氧化剂存在于由低密度聚乙烯（LDPE）、高密度聚乙烯（HDPE）、聚丙烯（PP）、聚氯乙烯（PVC）和聚对苯二甲酸乙二酯（PET）制成的商用食品包装中，以及在实验室挤出的LDPE薄膜中。研究了酚类抗氧化剂丁基羟基茴香醚（BHA）、二丁基羟基甲苯（BHT）、AO 2246、AO 425、乙氧喹330、抗氧剂1010和抗氧剂1076，以及亚磷酸酯Irgafos 168及其两种降解产物磷酸盐和邻苯二甲酸二丁酯（DBP）。使用微波能量从聚烯烃中提取抗氧化剂，并使用高效液相色谱法（HPLC）进行分析，以确定不同商用薄膜中的抗氧化剂含量。在大多数样品中发现了抗氧剂1010和抗氧剂1076，通常还伴有亚磷酸酯Irgafos 168及其氧化产物（磷酸盐）。在水性食品模拟物中经过固相萃取（SPE）预处理后，以及在脂肪类食品模拟物中用四氢呋喃（THF）稀释后，通过HPLC测定每种抗氧化剂的特定迁移水平。这些水平远低于法规允许的限值。
