应用气相色谱模拟分离软件快速检测火腿肠及肠衣中的塑化剂
2018-08-14汪聪茜傅厚暾万昆朱天容宋春宇胡思前
汪聪茜 傅厚暾 万昆 朱天容 宋春宇 胡思前
摘 要:利用气相色谱模拟分离软件,测定火腿肠及其肠衣中的塑化剂邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二丁酯、邻苯二甲酸二环己酯、邻苯二甲酸二(2-乙基)己酯和邻苯二甲酸二正辛酯的含量。对比超声提取和索式提取2 种前处理方法对样品中塑化剂的提取效果,确定了程序升温条件,采用外标法定量。结果表明:6 种标准物质的标准曲线R2为0.996 7~0.998 8,最小检出限为0.04 mg/kg,相对标准偏差为5.0%~9.3%;索式提取法的提取效果更显著,某些火腿肠和火腿肠肠衣中含有高含量的生殖致癌物邻苯二甲酸酯类物质。
关键词:火腿肠;塑化剂;模拟分离;气相色谱
Abstract: Gas chromatography separation simulation software was used to determine the contents of the plasticizers dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), dicyclohexyl phthalate (DCHP), bis(2-ethylhexyl) phthalate (DEHP) and di-n-octyl phthalate (DNOP) in sausage and casing. Ultrasonic-assisted extraction and Soxhlet extraction were compared for their efficiencies in the extraction of plasticizers. The optimum temperature programming condition was established. The plasticizers were quantified by the external standard method. Overall, the correlation coefficients for six plasticizers were 0.996 7–0.998 8, and the lowest detection limits was 0.04 mg/kg. The precision expressed as relative standard deviation was 5.0%–9.3%. Soxhlet extraction showed higher extraction efficiency than ultrasonic-assisted extraction. Some samples of sausage and casing were found to contain significant amounts of carcinogenic phthalates.
Keywords: sausage; plasticizer; simulated separation; gas chromatography
DOI:10.7506/rlyj1001-8123-201804008
中圖分类号:TS207.3 文献标志码:A 文章编号:1001-8123(2018)04-0044-04
塑化剂的主要成分是邻苯二甲酸酯(phthalates,PAEs)类物质,它具有种类多、难以降解、生物富集性强的特点,对人体和其他动物均有较大的毒性[1]。近几年,研究人员发现PAEs类污染物对儿童的危害更大,主要表现在致癌[2]、致畸[3]及免疫抑制性[4]方面,并会使人体的生殖功能出现异常[5]。到目前为止,可能含有塑化剂的产品有食品包装袋、保鲜膜[6]、一次性塑料水杯、塑料手套、雨衣、鞋类、皮革类仿制品、浴室窗帘等日用品[7]、发胶、口红、指甲油、乳液等化妆品以及方便面、白酒[8]、食用油[9]、浓汤类食品、粉末清洁用品、医疗仪器(注射针筒、血袋和医疗用塑胶软管)、儿童玩具等[10]。用于食品包装膜的增塑剂[11]主要为PAEs,如邻苯二甲酸二(α-乙基已酯)酯(bis(2-ethylhexyl)phthalate,DEHP)、邻苯二甲酸丁二酯(dibutyl phthalate,DBP)、邻苯……
