免疫亲和柱-HPLC柱后光化学衍生法测定中药饮片中黄曲霉毒素B_1、B_2、G_1、G_2的含量

Determination of Aflatoxins in Taditional Chinese Medicine by Cleaning up the Immunoaffinity Column and HPLC with Post Column Photochemical Derivatization

目的:建立中药饮片中黄曲霉毒素(AF)B1、B2、G1、G2含量测定的方法。方法:收集中药饮片87批,用免疫亲和柱进行AF的分离处理,采用高液相色谱(HPLC)柱后光化学衍生化法测定中药饮片中AFB1、AFB2、AFG1、AFG2含量并进行方法学分析。结果:被测定的AFB1、AFB2、AFG1、AFG2的检出限分别为0.7、0.3、0.6和0.3μg/kg,在选定的范围内线性关系良好(r≥0.999),精密度试验、重复性试验、准确度试验及标准样品验证试验结果均良好,87批中药饮片均未检出黄曲霉毒素。结论:免疫亲和柱-HPLC柱后光化学衍生化法操作简便,专属性强、灵敏度高,检测中药饮片中AFB1、AFB2、AFG1及AFG2的含量准确可靠。

Objective：To establish a method for determination of aflatoxins in Chinese medicinal de-coction pieces and to promote quality control of Chinese medicinal decoction pieces. Methods：Eighty-seven batches of Chinese medicinal decoction pieces were collected and immunoaffinity column and HPLC with post column photochemical derivatization was adopted to measure aflatoxins content,inclu-ding aflatoxin B1,aflatoxin B2,aflatoxin G1,aflatoxin G2 in all samples. Results：The detection lim-it of aflatoxin B1 ,aflatoxin B2 ,aflatoxin G1 ,aflatoxin G2 was 0 . 7 ,0 . 3 ,0 . 6 and 0 . 3 μg/kg respec-tively. There was a a good linear relationship（r≥0. 999）in selected range of content. The results of precision test,repeatability test,accuracy test were good as well. In 87 different batches of Chinese medicinal decoction pieces,aflatoxins were not detected. Conclusion：The mothod of Immunoaffinity column and HPLC with post column photochemical derivatization is convenient,specific,sensitive,ac-curate and reliable in measuring aflatoxins content of Chinese medicinal decoction pieces.