Effective and sensitive determination of eleven disinfection byproducts in drinking water by DLLME and GC？MS
- Effective and sensitive determination of eleven disinfection byproducts in drinking water by DLLME and GC？MS
- 표희수; 온지원; 명승운
- Dispersive liquid？liquid microextraction; Disinfection by-product; Drinking water; Gas chromatography-mass spectrometry
- Issue Date
- The Science of the total environment
- VOL 639-216
- The aim of this study was to optimize the dispersive liquid– liquid microextraction (DLLME) parameters for simultaneous analysis through DLLME-gas chromatography– mass spectrometry (GC– MS) of six iodo-trihalomethanes, four haloacetonitriles, and one halonitromethane, which are residual disinfection products found in drinking water. Eleven disinfection by-product (DBPs) remaining in aqueous samples were extracted and concentrated using a simple, rapid, and environmentally friendly DLLME method, and then analyzed simultaneously by GC– MS. The optimized DLLME parameters were a sample volume of 5  mL, 100  μL of dichloromethane as the extraction solvent, 1  mL of methanol as the dispersion solvent, an extraction time of 60  s, and 1.5  g of sodium chloride for the salting out effect. The enrichment factor values obtained using the established DLLME-GC– MS method were 19.8– 141.5, and the limit of detection and limit of quantification were 0.22– 1.19  μg/L and 0.75– 3.98  μg/L, respectively. The calibration curves had correlation coefficients (r2) of 0.9958– 0.9992 in the concentration range of 0.5– 40  μg/L, and they exhibited good linearity in quantitative analysis. This new method could be useful for analyzing eleven DBPs that remain in drinking water.
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