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首页> 外文期刊>Journal of mass spectrometry: JMS >Identification and characterization of impurities in an insecticide, bifenthrin technical
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Identification and characterization of impurities in an insecticide, bifenthrin technical

机译：杀虫剂中杂质的鉴定与表征，BIFENTHRIN技术

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摘要

The HPLC-DAD and GC/MS methods were successfully used for the identification and characterization of the impurities in an agrochemical insecticide, bifenthrin technical. Three impurities ranging from 0.175%-0.541% were detected by the HPLC-DAD method. The LC/MS technique with ESI or APCI source failed to detect the impurities detected by HPLC-DAD, due to lack of ionization in ESI or APCI. The three impurities were enriched by prep-HPLC, and then their structures were elucidated based on the GC/EIMS and CIMS data. The EI mass spectra of bifenthrin and its impurities displayed molecular ion and provided structure indicative fragment ions; the CIMS data further confirmed their molecular weight. The identity of the impurity 1 was further confirmed by the synthesis of the authentic sample followed by NMR and GC/MS data.
机译：HPLC-DAD和GC / MS方法已成功地用于鉴定和表征农业化学杀虫剂中的杂质，二叶草毒素技术。 通过HPLC-DAD法检测从0.175％-0.541％的三种杂质。 由于ESI或APCI中缺乏电离，具有ESI或APCI源的LC / MS技术未能检测到HPLC-DAD检测的杂质。 通过制备HPLC富集三种杂质，然后基于GC / EIMS和CIMS数据阐明它们的结构。 二叶素的EI质谱及其杂质显示分子离子，并提供结构指示性碎片离子; CIMS数据进一步证实了它们的分子量。 通过合成真实的样品，然后进行NMR和GC / MS数据，进一步证实杂质1的同一性。

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