BACKGROUND:The phenol concentrations in water samples were determined using gas chromatography after derivatization of the analyte to phenyl acetate followed by extraction using a large volume of solvent.However, this procedure requires an additional purification step and is not analytically efficient. METHODS AND RESULTS:In this study, phenol was first extracted from an acidified water sample using ethyl acetate and then acetylated using acetic anhydride in the presence of a small amount of water and K 2 CO 3 .The derivative was extracted using 1 mL of n-butyl acetate.One microliter of the extract was analyzed by GC-MS without further purification.The calibration curve showed good linearity with the r 2 value of 0.9968.The method detection limit and the limit of quantitation were estimated to be 0.18 µg/L and 0.56 µg/L, respectively.Repeatability (RSD, n=3) and recovery (n=3) were 9.1%-4.3%and 90.6%-110.5%,respectively.The concentrations of phenol in a fewsamples of stream water were distributed in the range of 2.51-7.51µg/L. CONCLUSION:This method is simpler and faster to implement than those currently utilized and shows high analytical reliability.It can be applied to the quantitative determination of phenol concentrations in surface water and groundwater samples.
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Park et al. (2017) studied this question.