全自动固相萃取-高效液相色谱法测定熏烤肉制品中苯并(a)芘含量
2020-06-01刘孝英王毅
刘孝英 王毅



摘 要:建立全自动固相萃取-高效液相色谱法检测熏烤肉制品中苯并(a)芘的方法。样品经正己烷提取、分子印迹小柱净化,高效液相色谱-荧光检测器检测,流动相为乙腈-水(90∶10,V/V),流速1.0 mL/min。结果表明:苯并(a)芘在0.0~45.2 ng/mL质量浓度范围内线性关系良好,相关系数(R2)为0.999 7,检出限为0.12 μg/kg,回收率为97.2%~100.2%,相对标准偏差为1.4%~2.6%。该方法灵敏度高,稳定性好,批处理速度快,接触有机试剂较少,适用于熏烤肉制品中苯并(a)芘残留量测定。
关键词:苯并(a)芘;全自动固相萃取;高效液相色谱法;熏烤肉制品
Abstract: A method was developed for the determination of benzo(a)pyrene in smoked and roasted meat products by automated solid phase extraction combined with high performance liquid chromatography (HPLC). The benzo(a)pyrene in samples was extracted with n-hexane, and purified with a molecularly imprinted column. The analyte was analyzed by HPLC with a fluorescence detector using acetonitrile-water (90:10, V/V) as the mobile phase at a flow rate of 1.0 mL/min. The results showed that a good linearity was achieved in the concentration range of 0.0–45.2 ng/mL with a correlation coefficient of 0.999 7. The detection limit was 0.12 μg/kg. The mean recoveries of benzo(a)pyrene were in the range of 97.2%–100.2% with relative standard deviations (RSDs) of 1.4%–2.6%. In conclusion, the proposed method is sensitive, stabile, and rapid with less contact with organic reagents, and is suitable for the analysis of benzo(a)pyrene in smoked and roasted meat products.
Keywords: benzo(a)pyrene; automated solid phase extraction; high performance liquid chromatography; smoked and roasted meat products
DOI:10.7506/rlyj1001-8123-20200106-005
中图分类号:TS251.7 文献标志码:A 文章编号:1001-8123(2020)03-0063-05
苯并(a)芘,化学式C20H12,是一种五苯环芳香烃类化合物,不溶于水,微溶于乙醇、甲醇,易溶于苯、甲苯、二甲苯、氯仿等有机溶剂[1-4]。苯并(a)芘是公认的强致癌物,是多环芳烃类化合物中毒性最大的一种,微小剂量就能引起癌变,对人体细胞具有强烈致突变和致畸性[5-8]。苯并(a)芘在环境中存在广泛,食品中的苯并(a)芘来源主要有两方面:一是工业生产和生活过程中煤炭、石油、天然气、木材等燃料不完全燃烧产生的废气,如汽车尾气、橡胶、沥青产生的烟气等,通过食物链在动植物体内发生生物蓄积,造成食物污染[9-12];二是食物在熏制、烘烤和煎炸过程中,脂肪、胆固醇、蛋白质和碳水化合物等在高温条件下会发生热裂解反应,再经过一系列复杂的环化和聚合反应就会形成包括苯并(a)芘在内的多环芳烃类物质,尤其是当食品在烟熏和烘烤过程中发生焦糊现象时,苯并(a)芘的生成量将会比普通食物增加10~20 倍[13-16]。……
