Determination of Typical Odor Compounds in Surface Water by HS-SPME-GC/MS

Headspace solid-phase microextraction followed by gas chromatography/mass spectrometry(HS-SPME-GC/MS)was used to detect the trace odor compounds(2-MIB,β-cyclocitral,GSM and β-lonone)in surface water.The optimal operation conditions of SPME were obtained as follows: extraction time 30 min,extraction temperature 55 ℃,NaCl dosage 30%(m/V),stirring rate 500 r/min and fiber desorption time 30 min in GC.Under the optimal conditions,a perfect linear relationship among four compounds was found in the range from 1 to 1 000 ng/L with the correlation coefficient(r2) ranging from 0.993 3 to 0.997 5.The LODs(S/N=3) were in the range from 0.7 to 1.1 ng/L.The relative standard deviations were between 2.95% and 7.9%(n=6).Recoveries of spiked samples were between 89.7% and 103.2%.The advantage of the HS-SPME is simple and fast for determination of trace odor compounds in water.