Determination of pyrethroid insecticides by ion trap GC-MS-MS

✍ Scribed by Gerald F. Bauerle Jr.; Kenneth L. Ray; Jennifer S. Brodbelt

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 823 KB
• Volume: 317
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(95)00431-9

✦ Synopsis

Selected ejection isobutane chemical ionization (SECI) of pyrethroid insecticides was compared to collisionally activated dissociation (CAD) of selected ions by using a benchtop quadrupole ion trap mass spectrometer.

SECI-CAD was

successfully demonstrated for compounds of different masses which elute closely. SEC1 produced a characteristic cleavage at the ester bond for most compounds, while SECI-CAD of the protonated species showed this cleavage as well, but with a reduced number of different fragment ions for the higher mass pyrethroids. The limit of detection showed a loss of one order of magnitude during the isolation step of the ions followed by a loss of half or none of the ion intensity during the activation step. Typical detection limits were in the ppb range.