Uncertainty Evaluation of Deoxynivalenol Content in Wheat Determined by Isotope Dilution Liquid Chromatography-Tandem Mass Spectrometry
The possible uncertainties in the determination of deoxynivalenol in wheat by isotope dilution liquid chromatography-tandem mass spectrometry were analyzed and evaluated to provide reference for the establishment of effective quality control methods.The results indicated that when the content of deoxynivalenol in wheat was 306μg/kg,the expanded uncertainty was 59 μg/kg(k=2),the main factor affecting the uncertainty was the preparation of standard solution,followed by sample weighing and sample matrix,while the uncertainty introduced by sample ex-traction and constant volume,standard curve fitting and measurement repeatability was small.
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