| Organophosphate esters(OPs) are widely used as flame retardants and plasticizers.A rapid method for the determination of seven OPs in water was developed based on enrichment via solid-phase extraction(SPE) and determination by gas chromatography-mass spectrometry(GC-MS).The SPE cartridge and elution solvent were optimized,consequently,Oasis HLB(200 mg) cartridge was chose as extractive cartridge and ethyl acetate was selected as elution solvent.Under the optimized conditions,the developed method was verified using the blank spiked and the matrix spiked,and acceptable recoveries and good reproducibilities were achieved,with recoveries of(74±12)%-(118±3.0)% and(62±6.9)%-(121±2.2)% for the blank spiked and the matrix spiked,respectively.The instrumental detection limits(IDLs) for specific chemicals were in the range of 4-15 μg/L.The established method was proved to be efficient via measurement on the occurrence and concentrations of the 7 OPs in two surface water samples collected from the Pearl River,and effluent from a waste water treatment plant (WWTP) in Guangzhou. |