Key wordsgpc, gcms, blood, organophosphorus, human, pesticides, vortex, moblie, modified, quechers, pretreament, coe, benzocaine, abused, amobarbital, pentobarbital, meprobamate, estazolam, clozapine, phenobarbital, triazolam, lidocaine, nitrazepam, recovery, carbamazepine, clonazepam, brought, injector, temperature, satisfactory, evaporate, alprazolam, determinations, permeation, diazepam, rsd, method, acephate, meeting, centrifuge, gel, without, dimethoate, volume, supernatant, parathion, phase, acceptable, global, coefficient