非水毛细管电泳-化学发光法测定食品包装材料中酚类环境激素

建立食用包装材料中的双酚A、壬基酚等多种环境激素的非水毛细管电泳-化学发光分析方法.食品包装材料样品浸出物中的双酚A、烷基酚等环境激素经衍生剂DIB-Cl衍生后,经过非水毛细管电泳分离后,分别与过氧草酸酯化学发光反应体系作用,光信号经过光电倍增管接收放大后被检测.以雌二醇(17β-E2)为内标,以相对迁移时间定性,相对发光强度比定量,内标校准曲线法测定样品浸出物中待测物的含量.对影响非水毛细管电泳分离如溶剂组成和比例、电解质浓度、温度、乙酸浓度、电泳电压等条件进行了优化.同时对化学发光体系也进行了优化.4-叔丁基酚、双酚A、4-叔辛基酚、4-壬基酚和四溴双酚 A分别在0.0095～3.0 mg/L, 0.0087～3.0 mg/L, 0.0085～3.0 mg/L, 0.011～3.0 mg/L和0.009～3.0 mg/L范围内线性良好,r＞0.9947.相对迁移时间和相对峰高的RSD分别为0.88%～2.96%和 6.54%～8.57%.加标回收率为86.7%～98.8%.对5种常见的食品包装材料样品进行了测定, 所建立的方法简便、快速、灵敏,适合于食品包装材料中酚类环境激素的检测.

Determination of Phenolic Environmental Estrogens in Food Packing Materials by Nonaqueous Capillary Electrophoresis-Chemiluminescence

Nonaqueous capillary electrophoresis-chemiluminescence ( NACE) method was developed for the determination of five phenolic environmental estrogens including bisphenol A ( BPA) ,4-nonylphenol( 4-NP) ,4-tert-octylphenol( 4-tOP) ,4-tert-butylphenol( 4-tBP) and tetrabromobisphenol A( TBBPA) in food packaging material. Target compounds in soaking solution of food packaging material samples were separated by NACE-CL after derivatization with 4-( 4,5-diphenyl-1H-imidazol-2-yl) benzoyl chloride ( DIB-Cl) ,reacted w...