To ensure an accurate analysis, two derivatization methods, bromination and aflatoxin-trifluoroacetic acid derivatization (ATD), were compared. The limits of detection (LODs) of the bromination method were 124.42-151.73 ng/kg, and the
recovery rates were between 64 and 102%. The detection rates and concentration levels of AFM1 were 6-74% and 14.48-
270.94 ng/kg, respectively.