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Salt-assisted dispersive liquid–liquid microextraction coupled with programmed temperature vaporization gas chromatography–mass spectrometry for the determination of haloacetonitriles in drinking water

•A novel dispersant solvent-free MADLLME method was reported.•The dispersion of extractant in aqueous sample was performed only by salt addition.•Quantification of HANs was performed by PTV-GC–MS.•Preservation and occurrence study for MIAN was performed for the first time.•Six target HANs detected i... Full description

Journal Title: Journal of Chromatography A 5 September 2014, Vol.1358, pp.14-19
Main Author: Ma, Huilian
Other Authors: Li, Yun , Zhang, Haijun , Shah, Syed Mazhar , Chen, Jiping
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0021-9673 ; DOI: 10.1016/j.chroma.2014.06.021
Link: http://dx.doi.org/10.1016/j.chroma.2014.06.021
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recordid: sciversesciencedirect_elsevierS0021-9673(14)00918-2
title: Salt-assisted dispersive liquid–liquid microextraction coupled with programmed temperature vaporization gas chromatography–mass spectrometry for the determination of haloacetonitriles in drinking water
format: Article
creator:
  • Ma, Huilian
  • Li, Yun
  • Zhang, Haijun
  • Shah, Syed Mazhar
  • Chen, Jiping
subjects:
  • Disinfection By-Products
  • Haloacetonitrile
  • Salt-Assisted
  • Dispersive Liquid–Liquid Microextraction
  • Programmed Temperature Vaporizer
  • Gas Chromatography–Mass Spectrometry
ispartof: Journal of Chromatography A, 5 September 2014, Vol.1358, pp.14-19
description: •A novel dispersant solvent-free MADLLME method was reported.•The dispersion of extractant in aqueous sample was performed only by salt addition.•Quantification of HANs was performed by PTV-GC–MS.•Preservation and occurrence study for MIAN was performed for the first time.•Six target HANs detected in different drinking waters. We report here a new analytical method for the simultaneous determination of seven haloacetonitriles (HANs) in drinking water by coupling salt-assisted dispersive liquid–liquid microextraction (SADLLME) with programmed temperature vaporizer-gas chromatography–mass spectrometry (PTV-GC–MS). The newly developed method involves the dispersion of the extractant in aqueous sample by addition of a few grams of salt and no dispersion liquid was required as compared to the traditional DLLME methods. The extractant (CH2Cl2, 50μL) and the salt (Na2SO4, 2.4g) were successively added to water (8mL) in a conical centrifuge tube that was shaken for 1min and centrifuged (3500rpm, 3min). The aliquot of sedimented phase (4μL) was then directly injected into the PTV-GC–MS system. The limits of detection and quantification for the HANs were 0.4–13.2ngL−1 and 1.2–43.9ngL−1, respectively. The calibration curves showed good linearity (r2≥0.9904) over 3 orders of magnitude. The repeatability of the method was investigated by evaluating the intra- and inter-day precisions. The relative standard deviations (RSDs) obtained were lower than 10.2% and 7.8% at low and high concentration levels. The relative recoveries ranged from 79.3% to 105.1%. The developed methodology was applied for the analysis of seven HANs in several drinking water samples in coastal and inland cities of China. It was demonstrated to be a simple, sensible, reproducible and environment friendly method for the determination of trace HANs in drinking water samples.
language: eng
source:
identifier: ISSN: 0021-9673 ; DOI: 10.1016/j.chroma.2014.06.021
fulltext: fulltext
issn:
  • 00219673
  • 0021-9673
url: Link


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titleSalt-assisted dispersive liquid–liquid microextraction coupled with programmed temperature vaporization gas chromatography–mass spectrometry for the determination of haloacetonitriles in drinking water
creatorMa, Huilian ; Li, Yun ; Zhang, Haijun ; Shah, Syed Mazhar ; Chen, Jiping
ispartofJournal of Chromatography A, 5 September 2014, Vol.1358, pp.14-19
identifierISSN: 0021-9673 ; DOI: 10.1016/j.chroma.2014.06.021
subjectDisinfection By-Products ; Haloacetonitrile ; Salt-Assisted ; Dispersive Liquid–Liquid Microextraction ; Programmed Temperature Vaporizer ; Gas Chromatography–Mass Spectrometry
description•A novel dispersant solvent-free MADLLME method was reported.•The dispersion of extractant in aqueous sample was performed only by salt addition.•Quantification of HANs was performed by PTV-GC–MS.•Preservation and occurrence study for MIAN was performed for the first time.•Six target HANs detected in different drinking waters. We report here a new analytical method for the simultaneous determination of seven haloacetonitriles (HANs) in drinking water by coupling salt-assisted dispersive liquid–liquid microextraction (SADLLME) with programmed temperature vaporizer-gas chromatography–mass spectrometry (PTV-GC–MS). The newly developed method involves the dispersion of the extractant in aqueous sample by addition of a few grams of salt and no dispersion liquid was required as compared to the traditional DLLME methods. The extractant (CH2Cl2, 50μL) and the salt (Na2SO4, 2.4g) were successively added to water (8mL) in a conical centrifuge tube that was shaken for 1min and centrifuged (3500rpm, 3min). The aliquot of sedimented phase (4μL) was then directly injected into the PTV-GC–MS system. The limits of detection and quantification for the HANs were 0.4–13.2ngL−1 and 1.2–43.9ngL−1, respectively. The calibration curves showed good linearity (r2≥0.9904) over 3 orders of magnitude. The repeatability of the method was investigated by evaluating the intra- and inter-day precisions. The relative standard deviations (RSDs) obtained were lower than 10.2% and 7.8% at low and high concentration levels. The relative recoveries ranged from 79.3% to 105.1%. The developed methodology was applied for the analysis of seven HANs in several drinking water samples in coastal and inland cities of China. It was demonstrated to be a simple, sensible, reproducible and environment friendly method for the determination of trace HANs in drinking water samples.
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description•A novel dispersant solvent-free MADLLME method was reported.•The dispersion of extractant in aqueous sample was performed only by salt addition.•Quantification of HANs was performed by PTV-GC–MS.•Preservation and occurrence study for MIAN was performed for the first time.•Six target HANs detected in different drinking waters. We report here a new analytical method for the simultaneous determination of seven haloacetonitriles (HANs) in drinking water by coupling salt-assisted dispersive liquid–liquid microextraction (SADLLME) with programmed temperature vaporizer-gas chromatography–mass spectrometry (PTV-GC–MS). The newly developed method involves the dispersion of the extractant in aqueous sample by addition of a few grams of salt and no dispersion liquid was required as compared to the traditional DLLME methods. The extractant (CH2Cl2, 50μL) and the salt (Na2SO4, 2.4g) were successively added to water (8mL) in a conical centrifuge tube that was shaken for 1min and centrifuged (3500rpm, 3min). The aliquot of sedimented phase (4μL) was then directly injected into the PTV-GC–MS system. The limits of detection and quantification for the HANs were 0.4–13.2ngL−1 and 1.2–43.9ngL−1, respectively. The calibration curves showed good linearity (r2≥0.9904) over 3 orders of magnitude. The repeatability of the method was investigated by evaluating the intra- and inter-day precisions. The relative standard deviations (RSDs) obtained were lower than 10.2% and 7.8% at low and high concentration levels. The relative recoveries ranged from 79.3% to 105.1%. The developed methodology was applied for the analysis of seven HANs in several drinking water samples in coastal and inland cities of China. It was demonstrated to be a simple, sensible, reproducible and environment friendly method for the determination of trace HANs in drinking water samples.
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abstract•A novel dispersant solvent-free MADLLME method was reported.•The dispersion of extractant in aqueous sample was performed only by salt addition.•Quantification of HANs was performed by PTV-GC–MS.•Preservation and occurrence study for MIAN was performed for the first time.•Six target HANs detected in different drinking waters. We report here a new analytical method for the simultaneous determination of seven haloacetonitriles (HANs) in drinking water by coupling salt-assisted dispersive liquid–liquid microextraction (SADLLME) with programmed temperature vaporizer-gas chromatography–mass spectrometry (PTV-GC–MS). The newly developed method involves the dispersion of the extractant in aqueous sample by addition of a few grams of salt and no dispersion liquid was required as compared to the traditional DLLME methods. The extractant (CH2Cl2, 50μL) and the salt (Na2SO4, 2.4g) were successively added to water (8mL) in a conical centrifuge tube that was shaken for 1min and centrifuged (3500rpm, 3min). The aliquot of sedimented phase (4μL) was then directly injected into the PTV-GC–MS system. The limits of detection and quantification for the HANs were 0.4–13.2ngL−1 and 1.2–43.9ngL−1, respectively. The calibration curves showed good linearity (r2≥0.9904) over 3 orders of magnitude. The repeatability of the method was investigated by evaluating the intra- and inter-day precisions. The relative standard deviations (RSDs) obtained were lower than 10.2% and 7.8% at low and high concentration levels. The relative recoveries ranged from 79.3% to 105.1%. The developed methodology was applied for the analysis of seven HANs in several drinking water samples in coastal and inland cities of China. It was demonstrated to be a simple, sensible, reproducible and environment friendly method for the determination of trace HANs in drinking water samples.
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date2014-09-05