Rapid determination of volatile phenols in water by continuous flow analysis
To establish a method for the high-sensitivity,accurate,and rapid determination of volatile phenols in wa-ter by continuous flow injection analysis.Volatile phenols were released from the sample through distillation under a-cidic conditions.In a weakly alkaline medium with a pH of(10.0±0.2),volatile phenols could react with 4-amin-oantipyrine to form salmon pink compounds after oxidation by potassium ferricyanide,and the absorbance was meas-ured at 505 nm.Based on this principle,the analysis was carried out using the continuous flow analyzer AA3 in bub-ble isolation mode,with online distillation and online colorimetry.The concentration of volatile phenols showed linear-ity in the range of 0 to 0.100 mg/L,with a detection limit of 0.97 μg/L.The method is suitable for the determination of trace volatile phenols in large volumes of water samples.[Chinese Fishery Quality and Standards,2024,14(1):35-40]
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