The determination of phenols in aqueous effluents
A method is described for the determination of monohydric and dihydric phenols in aqueous effluents. The phenols were extracted into methyl isobutyl ketone, the trimethylsilyl ethers prepared, separated by gas—liquid chromatography and detected by a flame ionization detector. Complete separation of phenol, cresols, xylenols, ethylphenols and dihydric phenols was achieved using dual stainless steel columns packed with Chromosorb W (AW-DCMS) coated with 5 per cent tri-2,4-xylenyl phosphate and by linear temperature programming from 75° to 125°C at 1.5°C min−1; concentrations down to 0.1 mg l−1 of each phenol in the original sample could be determined. The results obtained by the gas chromatographic method were compared with those using standard colorimetric methods of analysis for carbonization effluents arising from different sources. The method is generally applicable to wastes containing phenols.
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