气相色谱-串联质谱法测定水中29种致嗅物质OA北大核心CSTPCD

A rapid method was developed for the determination of 29 odor-causing substances in wa-ter using headspace-arrow-solid-phase microextraction(HS-Arrow-SPME)coupled with gas chroma-tography-tandem mass spectrometry(GC-MS/MS).By optimizing the pretreatment conditions and GC-MS/MS parameters,10 mL of water samples were selected to be added into a headspace vial,pre-incubated at 70℃for 8 min with the assistance of 3.5 g NaCl salting-out,then extracted with a DVB/Carbon WR/PMDS Smart SPME Arrow extraction head for 20 min,and finally desorbed at the inlet of 240℃for 3 min.The GC-MS/MS platform was configured with a VF-624 MS column(30 m×0.25 mm×1.4 μm)and detected in multiple reaction monitoring(MRM)mode.The results showed that the linearity of the 29 odor-causing substances in water was good in the ranges of 5-300 ng/L with correlation coefficients(r2)greater than 0.991.The limits of detection and the limits of quantitation ranged of 0.31-9.27 ng/L and 1.26-37.09 ng/L,respectively.The recoveries of 29 odor-causing substances spiked with the ultra-pure water as the blank matrix at spiked levels of 10,80,and 160 ng/L were in the ranges of 84.3%-112%,and the relative standard deviations(RSDs,n=6)were in the ranges of 0.10%-8.6%.The method has been used for the determination of 29 targets in real wa-ter samples and can meet the requirements for the detection of trace odor-causing substances.