Determination of Trace Phenols in Sources of Drinking Water by GC-MS

GC-MS combined with solid phase extraction (SPE) by PSD column was developed for simultaneous determination of 8 trace phenols in sources of drinking water. The sample was mixed with substitute solution, and the analytes was extracted and enriched from the solution by a PSD SPE column with ethylacetate as eluant. The eluent was dried by nitrogen blowing and the analytes were resolved in a mixture of acetone and hexane. DM-35MS capillary column was selected to separate the phenols. EI and SIM were adopted in MS analysis. Linear relationships were found between the peak areas and the mass concentrations of 8 phenols in the range of 2.0-1 000 μg·L-1, with detection limits (3S/N) in the range of 0.43-1.03 μg·L-1. Recovery rates obtained by standard addition method were in the range of 85.8%-96.7% and RSDs (n=6) were less than 5.0%. Results of sample analysis showed that phenol was the largest residue in the source of drinking water.