GC-MS Determination of Smelly Substances in Surface Water with Dispersive Solid-Phase Extraction

A method for the detection of smelly compounds including geosmin, 2-MIB, β-cyclocitra, β-zonon, TCA, IPMP and IBMP in water was developed with dispersive solid-phase extraction by GC-MS. The optimized condition for dispersive solid-phase extraction was settled with good reproducibility and high precision. Linear relationship between values of peak area and mass concentration of typical odor compounds was obtained in the same range of 0.05-10.0 μg·L-1 . The detection limits (3S/N) ranged from 1 to 5 ng·L-1. The proposed method was applied to the analysis of blank water samples added with mixed standard solution, giving values of recovery and RSD′s (n=5) in the ranges of 81.6%-98.4% and 7.1%-14% respectively.