Comparison of two analytical methods (ELISA and LC-MS/MS) for determination of aflatoxin B-1 in corn and aflatoxin M-1 in milk

The aim of this paper is to assess the closeness of agreement between results of ELISA and LC-MS/MS methods for determination of aflatoxin B-1 in corn and aflatoxin M-1 in milk. Samples of corn (n=100) and milk (n=250) were simultaneously analyzed using ELISA and LC-MS/MS methods, after the severe drought that affected Serbia in summer 2012 resulting in occurrence of aflatoxin B1 in corn and aflatoxin M-1 in milk. Regression analysis showed higher level of agreement between aflatoxin B-1 samples (R2=0.994), compared to aflatoxin M-1 samples (r(2)=0.920). However, both techniques were satisfactory in meeting the requirements for official control purposes.