Fumonisins B₁, B₂ and B₃ in corn products, wheat flour and corn oil marketed in Shandong province of China

In this study a total of 522 samples were collected from Shandong province of China in 2014 and analysed for the occurrence of fumonisin B1 (FB₁), FB₂ and FB₃ by isotope dilution ultrahigh performance liquid chromatography–tandem mass spectrometry. Fumonisins were detected in 98.1% of the corn products, with the average total level of 369.2 μg kg⁻¹. The individual average values of FB₁, FB₂ and FB₃ in corn products were 268.3, 53.7 and 47.2 μg kg⁻¹, respectively. The simultaneous occurrence of FB₁, FB₂ and FB₃ was observed in 76.7% of the corn products. Especially, the results demonstrated that the difference in the contamination levels for fumonisins in these three types of corn products was apparent. In addition, 6.2% of the wheat flour samples were contaminated with FB₁, with concentrations ranging from 0.3 to 34.6 µg kg⁻¹. No FB₂ or FB₃ was detected in wheat flour. In corn oil samples no fumonisins were detected.本研究于2014年从中国山东省采集522份样本，采用同位素稀释超高效液相色谱-串联质谱法（isotope dilution ultrahigh performance liquid chromatography–tandem mass spectrometry）分析样本中伏马菌素B1（fumonisin B1，FB₁）、FB₂及FB₃的污染情况。98.1%的玉米制品中检出伏马菌素，总平均含量为369.2 μg·kg⁻¹。玉米制品中FB₁、FB₂与FB₃的单组分平均含量分别为268.3、53.7和47.2 μg·kg⁻¹。76.7%的玉米制品同时检出FB₁、FB₂与FB₃。尤为值得注意的是，本研究结果显示，三类伏马菌素在玉米制品中的污染水平差异显著。此外，6.2%的小麦粉样品检出FB₁，含量范围为0.3~34.6 μg·kg⁻¹。小麦粉中未检出FB₂与FB₃。玉米油样品中未检出任何伏马菌素。