数字农科院2.0

Study of the occurrence of toxic alkaloids in forage grass by liquid chromatography tandem mass spectrometry

文献类型: 外文期刊

作者: Mengjie Qie;Shuangyue Li;Chuntao Guo;Shuming Yang;Yan Zhao

作者机构:

关键词: Ergot alkaloids;Feed;Forage grass;LC-MS/MS;Pyrrolizidine alkaloids;Tropane alkaloids

期刊名称: Journal of Chromatography A

ISSN: 0021-9673

年卷期: 2021 年 1654.0 卷

页码:

收录情况: JCR(2021版) ; EI(2021版)

摘要: The toxic alkaloids in forage grass present a serious health hazard to humans and livestock, especially ergot alkaloids (EAs), pyrrolizidine alkaloids (PAs) and tropane alkaloids (TAs). Hence, there is a need for a simultaneous method that allows these dangerous plant toxins to be determined. A simple and effective method was developed to determine fifteen toxic alkaloids (EAs, PAs and TAs) in forage grass using the QuEChERS method and liquid chromatography tandem mass spectrometry (LC-MS/MS). The developed method was validated with average recoveries ranging from 63.10 to 102.10%, and relative standard deviations lower than or equal to 6.39% were obtained. Good linearity over the concentration range of 10-600 µg/kg dry matter (DM) was observed for the target alkaloids. The determination coefficients R2 calculated for each of the matrix calibration curves were greater than 0.99. The limits of detection and quantification were 5 µg/kg DM and 10 µg/kg DM, respectively. The reproducibility of the method was verified in three laboratories: all of the mean recoveries of 15 alkaloids were higher than 60%, and the relative standard deviations in alkaloids between laboratories were all less than 14.24%. The proposed method was applied to analyse 134 forage grass samples from the meadow steppe of Inner Mongolia to monitor toxic alkaloids. A significant difference in the frequency of contamination was found between different herbage species and different regions.

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