Quantitative Determination of Phenol in Water Using GC-MS after Liquid-Liquid Extraction and Acetylation
2017
Park, S., Kangwon National University, Chuncheon, Republic of Korea | Kim, Y., Kangwon National University, Chuncheon, Republic of Korea | Jung, S., Kangwon National University, Chuncheon, Republic of Korea | Kim, H., Kangwon National University, Chuncheon, Republic of Korea
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 K₂CO₃. The derivativewas extracted using 1mLof n-butyl acetate.One microliter of the extract was analyzed by GC-MS without further purification. The calibration curve showed good linearity with the r² value of 0.9968. Themethod detection limit and the limit of quantitationwere estimated to be 0.18 microgram/L and 0.56 microgram/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 streamwaterwere distributed in the range of 2.51-7.51 microgram/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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