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Determination of AFB1 content in peanut oil by HPLC-ESI MS/MS
  
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KeyWord:HPLC-ESI MS/MS  AFB1  peanut oil
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BAO Huimei  
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Abstract:
      A method for the determination of AFB1 content in peanut oil was developed by HPLC-ESI MS/MS, and the detection conditions were optimized. The results showed that the optimal detection conditions were obtained as follows: ion source temperature 110?℃, capillary voltage 3 500 V, electrospray ionization (ESI+)， sheath gas pressure 270 kPa, auxiliary gas pressure 104 kPa, magnetic gas flow rate 0.1 mL/min, with methanol as extraction solvent. Under these conditions, AFB1 had good linear relationship in the range of 1.00-11.00 ng/mL, and the limit of detection, average recovery rate and RSD were 0.3 μg/kg, 99.7% and 0.27% respectively. The method had the items of simpleness, rapidness, sensitivity and accuracy, and the ion pair scanning provided by ESI-MS could reduce the matrix interference to a great extent.
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