Abstract
Solid phase extraction was developed to determine Trichlorfon and Acephate in water. Trichlorfon was isolated on Sep-Pak plus PS-1 cartridge, then eluted with aceton. This aceton eluate was evaporated using centrifuge evaporator, then submitted directly to GC/ECD.
Acephate was isolated on Active carbon cartridge, then eluted with aceton. This eluate was evaporated to dryness. After dissolving the residue with aceton, the aceton solution was evaporated using centrifuge evaporator, then submitted directly to GC/MS systems.
The recoveries of Trichlorfon and Acephate for river water were 77.5% (relative standard deviation: 25%), 86.3% (relative standard deviation: 11%), respectively. In this method, the detection limit of both the compounds was 0.1μg/l.
