Determination of 2-Methylisoborneol and Geosmin in Water by Headspace Solid Phase Microextraction-Gas Chromatography-Mass Spectrometry

A method for the determination of 2-methylisoborneol (MIB) and geosmin (GSM) in water was developed by solid phase microextraction (SPME) coupled with gas chromatography-mass spectrometry(GC-MS). The best extraction conditions were as follows: water bath heating (The level of water surface in bath was set at the same level of sample), extraction temperature of 65 degrees C and extraction time of 30 min. The method was highly sensitive, better precisive and accuracy based on GC-MS results. The correlative coefficients for MIB and GSM were both over 0. 999; detection limits and RSD were 0. 2 ng/L, 0. 3 ng/L and 5. 8%, 3. 2% respectively; recoveries of spiked respectively were 102. 0% and 101. 7%. The method can be used to detect MIB and GSM in water.