Title: Determination of haloacetic acids in drinking waters by liquid-liquid extraction and HS-GC
Abstract: Objective:A method was developed for rapid determination of nine haloacetic acids in drinking waters by liquid-liquid extraction and HS-GC.Methods: Derivatisation of haloacetic acids with dimethylsulphate was completed.Mass transfer was accomplished in n-pentane-water two-phase system with tetrabutylammonium hydrogen sulphate as phase transfer catalyst.Vapor-liquid equilibrium of the methyl ester derivatives and the organic phase were completed by static headspace technique.The separation was performed on CP-Sil8 capillarity column and detected by ECD.Results: Calibration curves for the nine haloacetic acids were linear within the range of 0.1 μg/L~300 μg/L.The correlation coefficients were higher than 0.99.The limits of detection were between 0.05 μg/L~0.61 μg/L.The extraction recoveries ranged from 88.4% to 105% at three spiked levels of 1 μg/L,30 μg/L,100 μg/L for each haloacetic acid,and the RSDs ranged from 4.6% to 3.9%.Conclusion: The proposed method is simple,rapid,accurate,sensitive and suitable for the determination of haloacetic acids in drinking waters.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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