On, Jiwon Pyo, Heesoo Myung, Seung-Woon 2024-01-19T21:32:53Z 2024-01-19T21:32:53Z 2021-09-05 2018-10-15 0048-9697 https://pubs.kist.re.kr/handle/201004/120789 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 mu L 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 mu g/L and 0.75-3.98 mu g/L, respectively. The calibration curves had correlation coefficients (r(2)) of 0.9958-0.9992 in the concentration range of 0.5-40 mu g/L, and they exhibited good linearity in quantitative analysis. This new method could be useful for analyzing eleven DBPs that remain in drinking water. (C) 2018 Elsevier B.V. All rights reserved. English ELSEVIER LIQUID-LIQUID MICROEXTRACTION IODINATED TRIHALOMETHANES PHASE MICROEXTRACTION IODO-TRIHALOMETHANES CELL CYTOTOXICITY HALOACETIC ACIDS N-NITROSAMINES IMPACT CHLORINATION HALOACETONITRILES Effective and sensitive determination of eleven disinfection byproducts in drinking water by DLLME and GC-MS Article 10.1016/j.scitotenv.2018.05.077 1 SCIENCE OF THE TOTAL ENVIRONMENT, v.639, pp.208 - 216 SCIENCE OF THE TOTAL ENVIRONMENT 639 208 216 scie scopus 000436806200020 2-s2.0-85047218654 Environmental Sciences Environmental Sciences & Ecology Article LIQUID-LIQUID MICROEXTRACTION IODINATED TRIHALOMETHANES PHASE MICROEXTRACTION IODO-TRIHALOMETHANES CELL CYTOTOXICITY HALOACETIC ACIDS N-NITROSAMINES IMPACT CHLORINATION HALOACETONITRILES Dispersive liquid-liquid microextraction Disinfection by-product Drinking water Gas chromatography-mass spectrometry