human exposure to aflatoxins in Pirassununga region, São Paulo, Brazil, by determination of
urinary aflatoxins by a liquid chromatography coupled to mass sprectrometry (UPLC-MS/MS)
method. Sixteen volunteers with ages ranging from 14 to 55 years old were instructed to
collect the early morning first urine four times every three months, from June 2011 to March
2012, totaling 64 samples. Aflatoxin M1 (AFM1) was found in 39 samples (61%) at levels …