Survey of deoxynivalenol and aflatoxin B1 in instant noodles and bread consumed in Thailand by using liquid chromatography-tandem mass spectrometry

One hundred wheat product samples (50 instant noodle samples and 50 bread samples) were collected from supermarkets in Bangkok, Thailand. Deoxynivalenol (DON) and aflatoxin B1 (AFB1) contamination in these products was analyzed using a validated liquid chromatography-tandem mass spectrometry method. The limit of quantification values of DON and AFB1 in the instant noodles and bread were 2 and 1 ng g-1, respectively. The survey found that DON was quantifiable in 40% of collected samples, in 2% of noodles (0.089 μg g-1), and in 78% of breads (0.004 to 0.331 μg g-1). AFB1 was below the limit of quantification of the method in all of the tested samples. The results suggest that the risk of DON exposure via noodles and breads is very low in urban areas of Thailand. No risk can be attributable to AFB1 exposure in the same food matrices, but further studies with a larger sample size are needed to confirm these data