用高压液相色谱法检测罐装食品中类雌激素双酚A和烷基酚

目的 建立不同基质食品中双酚A（BPA）、壬基酚（NP）和辛基酚（OP）等类雌激素的高压液相色谱法（HPLC）,检测市售罐装食品中类雌激素。方法 固体样品经甲醇超声提取、二氯甲烷萃取、浓缩。液体样品的分析采用NH。柱浓缩、富集和净化。HPLC采用WatersXTerra^TM MSC18液相色谱柱分离,甲醇．水作为流动相梯度洗脱。采用荧光检测,激发波长：225nm;发射波长：310nm。结果 建立的方法具有良好的线性关系,蔬菜类罐装食品和方便面中BPA、NP和OP的检出限分别为0．5、0．1和0．1μg/kg,鱼、肉类罐装食品BPA、NP和OP的检出限分别为1、0．5和0．5μg/kg。BPA、NP和OP加标回收率分别为74．9％～95．1％、76．3％～103．6％和72．1％～109．2％;相对标准偏差（RSD）分别为4．98％～11．2％、2．35％～8．88％和5．61％～12．3％。结论 该方法测定罐装食品及方便面中类雌激素（BPA、OP和NP）,具有较高的灵敏度和选择性,结果准确可靠、重现性好。

Determination of bisphenol A and alkyl phenols in canned food with high performance liquid chromatography--fluorescence

OBJECTIVE: To establish a comprehensive analytical high performance liquid chromatography fluorescence detection (HPLC-FL) in detecting bisphenol A (BPA), nonylphenol (NP) and octylphenol (OP) in canned food sold in Beijing markets. METHODS: BPA, NP and OP was extracted with methanol and dichloroacetamide and concentrated. The samples were purified on an solid extraction cartridges. The HPLC system consisted of Waters XTerra MS C18 column, a mixture of methanol and water as mobile phase and fluorescence detector with the excitation and emission wavelength at 225 nm and 310 nm respectively. RESULTS: The method established had a linear relationship, showing the detection limit of BPA, OP and NP being 0.5, 0.1 and 0.1 microg/kg in canned vegetable and instant noodle and 1, 0.5 and 0.5 microg/kg in canned fish and meat can, respectively. The recoveries of BPA, NP and OP were 74.9%-95.1% , 76.3%-103.6% and 72.1%-109.2%. The precision was 4.98%-11.2% , 2.35%-8.88% and 5.61%-12.3%, respectively. CONCLUSION: The method is simple with high sensitivity and selectivity, suitable for the determination of NP, OP and BPA in canned food.