摘要
在对多种拟除虫菊酯类杀虫剂的质谱数据进行归纳整理的基础上,分析研究了其质谱裂解规律。结果表明:拟除虫菊酯类杀虫剂在离子化条件下,大多数品种极易裂解。含三元环的羧酸酯类菊酯分子中的羰基与三元环间的碳碳键易发生α断裂,得到含三元环的的特征碎片离子,同时苯环的苄基位发生断裂后得到m/z 181和m/z 208的特征碎片离子,且丰度都较高;醚类结构由于醚键氧原子的吸电子能力较强,得到m/z 183的特征碎片离子。
On the basis of mass spectrometric data of pyrethroid insecticides, the fragmentation pattens of mass spectra were studied. The results showed that under the ionization conditions, most pyrethroid insecticides were easy to crack. Carbon-carbon bond between carbonyl and three-membered ring occured α-cleavage easily in pyrethroid containing carbonyl, and characteristic fragment ions of m/z 181 and m/z 208 were obtained. i-Cleavage was occurred in pyrethroid containing ether group, and characteristic fragment ion of m/z 183 was obtained due to the strong electron absorptivity.
出处
《现代农药》
CAS
2015年第2期31-34,共4页
MODERN AGROCHEMICALS
关键词
拟除虫菊酯类杀虫剂
质谱
裂解规律
pyrethroid insecticide
mass spectra
fragmentation patten
