摘要
利用气相色谱 -质谱联用仪对除草剂溴苯腈辛酸酯原药中所含主要杂质进行了定性研究 ,通过质谱图推断出主要杂质及其结构 ,合成杂质标样 ,由保留时间及质谱图确认了所推断的杂质组成和结构。
The original bromoxynil octanoate and its main impurities are identified by GC/MS. Original bromoxynil octanoate sample are dissolved in acetone, injecting the solution and separates on HP-5MS 30 m×0.25 μm×0.25 mm column coupled with GC. The peak information of significant impurities is captured by mass detector. The compounds are qualitatively confirmed by comparing with retention time and MS spectrum of the standards. Under above GC/MS conditions, all components are fully separated, impurity Ⅰ is measured to be m/z 158; impurity Ⅱ is m/z 317; impurity Ⅲ is m/z 434. The result indicates that impurity Ⅰ, Ⅱ and Ⅲ is methyl caprylate, 2,6-dibromo-4-cyanophenyl acetate, 2,6-dibromo-4-methoxycarbonyphenyl octanoate, respectively.
出处
《质谱学报》
EI
CAS
CSCD
2003年第1期278-282,共5页
Journal of Chinese Mass Spectrometry Society
关键词
气相色谱-质诺联用仪
除草剂
溴苯腈辛酸酯原药
杂质
GC/MS
定性分析
mass spectrometry
identification of main impurities in bromoxynil octanoate
GC/MS
weedicide
characteristic ion
fragment pathway
