Determination of Aflatoxin B-1 in Feedstuffs without Clean-Up Step by High-Performance Liquid Chromatography

作者：Choochuay Sasiprapa; Phakam Jutamas; Jala Prakorn; Maneeboon Thanapoom; Tansakul Natthasit^*

来源：International Journal of Analytical Chemistry, 2018, 2018: 4650764.

DOI：10.1155/2018/4650764

A reliable and rapid method has been developed for the determination of aflatoxin B-1 (AFB(1)) in four kinds of feedstuff's comprising broken rice, peanuts, corn, and fishmeal. A sample preparation was carried out based on the QuEChERS method with the exclusion of the clean-up step. In this study, AFB(1) was extracted using acetonitrile/methanol (40/60 v/v), followed by partitioning with sodium chloride and magnesium sulfate. High-performance liquid chromatography with precolumn derivatization and fluorescence detection was performed. The coefficients of determination were greater than 0.9800. Throughout the developed method, the recovery of all feedstuffs achieved a range of 82.50-109.85% with relative standard deviation lower than 11% for all analytes at a concentration of 20-100 ng/g. The limit of detection (LOD) ranged from 0.2 to 1.2 ng/g and limit of quantitation (LOQ) ranged from 0.3 to 1.5 ng/g. The validated method was successfully applied to a total of 120 samples. The occurrence of AFB(1) contamination was found at the following concentrations: in broken rice (0.44-2.33ng/g), peanut (3.97-106.26ng/g), corn (0.8850.29 ng/g), and fishmeal (1.06-10.35 ng/g). These results indicate that the proposed method may be useful for regularly monitoring AFB(1) contamination in feedstuffs.

• 出版日期2018