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Negative chemical ionization mass spectra of polycyclic chlorinated insecticides

✍ Scribed by Ralph C. Dougherty; John Dalton; Francis J. Biros

Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
630 KB
Volume
6
Category
Article
ISSN
1076-5174

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✦ Synopsis

Negative ion mass spectra obtained under chemical ionization conditions (NCI) employing methane, isobutane or methylene chloride as the enhancement gas are presented for a series of chlorinated polycyclic insecticides. All of the compounds examined except 1-hydroxychlordene yielded molecular anions of substantial relative abundance (6 to 39 %). The most significant features of the spectra are the prominent peaks at masses greater than that of the molecule ion formed via ionmolecule association reactions. Peaks representing association of the parent molecule with ionic species such as H-, 0-, OH-, C1-, H,OCl-, HCI,-, CIOand CIS-were observed in some cases. The

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