Aflatoxin B1 and sterigmatocystin survey in beer sold in China.

A total of 101 samples of beer from the Chinese market were analysed for the presence of aflatoxin B1 (AFB1) and sterigmatocystin (STC), using methods based on liquid chromatography-tandem mass spectrometry. The limit of quantification and the limit of detection in beer were 0.1 and 0.03 µg/kg, respectively. Recoveries of AFB1 and STC from spiked beer samples were 97.8-103.6% and 92.7-102.1%, respectively. None of the beer purchased samples were contaminated with AFB1 or STC.