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基于分子印迹聚合物的固相萃取净化用于分析啤酒、红酒和葡萄汁中的赭曲霉毒素 A。

Molecularly imprinted polymer-based solid phase clean-up for analysis of ochratoxin A in beer, red wine, and grape juice.

机构信息

Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, P R China.

出版信息

J Sep Sci. 2013 Apr;36(7):1291-7. doi: 10.1002/jssc.201201055. Epub 2013 Mar 8.

Abstract

A simple, reliable, and low-cost method based on molecularly imprinted polymer as a selective sorbent of SPE was proposed for the determination of ochratoxin A (OTA) in beer, red wine, and grape juice by HPLC coupled with fluorescence detection (HPLC-FLD). Samples were diluted with water and cleaned up with an AFFINIMIP® SPE OTA column. After washing and eluting, the analyte was analyzed by HPLC-FLD. Under the optimized conditions, LOD and LOQ for OTA were 0.025 and 0.08 ng/mL, respectively. The recoveries of OTA from beer, red wine, and grape spiked at 0.1, 2, and 5 ng/mL ranged from 91.6 to 101.7%. Furthermore, after a simple regenerated procedure, the molecularly imprinted polymer based SPE column could be reused at least 14 times to achieve more than 80% recoveries of OTA in real samples. The developed method was applied to the detection of 30 beer, red wine, and grape juice samples and only four samples were contaminated by OTA with levels below the legal limits.

摘要

基于分子印迹聚合物作为固相萃取选择性吸附剂的简单、可靠且低成本的方法,用于通过 HPLC 结合荧光检测(HPLC-FLD)测定啤酒、红酒和葡萄汁中的赭曲霉毒素 A(OTA)。样品用稀释水稀释,并用 AFFINIMIP® SPE OTA 柱进行净化。在清洗和洗脱后,用 HPLC-FLD 分析分析物。在优化条件下,OTA 的 LOD 和 LOQ 分别为 0.025 和 0.08 ng/mL。在啤酒、红酒和葡萄中,OTA 的回收率在 0.1、2 和 5 ng/mL 时的范围为 91.6%至 101.7%。此外,经过简单的再生程序,基于分子印迹聚合物的 SPE 柱可以重复使用至少 14 次,在实际样品中 OTA 的回收率超过 80%。该方法用于检测 30 个啤酒、红酒和葡萄汁样品,只有四个样品被 OTA 污染,其含量低于法定限量。

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