 ISSN 0235-7216 ISSN 2424-4538 (online) |
2009 m. Nr. 3 Dispersive liquid–liquid microextraction for determination of volatile aromatic hydrocarbons in water
Dispersive liquid–liquid microextraction is suggested for volatile aromatic hydrocarbon sampling and preconcentration. The effects of extraction solvent type, extraction and disperser solvent volume, extraction time and ionic strength of the solution were investigated. Carbon tetrachloride containing n-octane as the internal standard was used as an extracting solvent, and acetone was used as a disperser solvent. The calibration graphs were linear up to 2 mg ml–1, the correlation coefficients were 0.998–0.999, the enrichment factors were from 144 for toluene to 239 for o-xylene, and the detection limits were 0.40, 0.35 and 0.33 μg l–1 for toluene, ethylbenzene and o-xylene, respectively. Repeatabilities of the results were acceptable, with relative standard deviations up to 11.7%. A possibility to apply the proposed method for volatile aromatic hydrocarbon determination in water samples was demonstrated. Keywords: dispersive liquid–liquid microextraction, gas chromatography, volatile aromatic hydrocarbons, water samples |
Issues:
2017 - Vol.28 No. 1, No. 2, No. 3, No. 4 2016 - Vol.27 No. 1, No. 2, No. 3, No. 4 2015 - Vol.26 No. 1, No. 2, No. 3, No. 4 2014 - Vol.25 No. 1, No. 2, No. 3, No. 4 2013 - Vol.24 No. 1, No. 2, No. 3, No. 4 2012 - Vol.23 No. 1, No. 2, No. 3, No. 4 2011 - Vol.22 No. 1, No. 2, No. 3, No. 4 2010 - Vol.21 No. 1, No. 2-4 2009 - Vol.20 No. 1, No. 2, No. 3, No. 4 2008 - Vol.19 No. 1, No. 2, No. 3-4 2007 - Vol.18 No. 1, No. 2, No. 3, No. 4 2006 - Vol.17 No. 1, No. 2-3, No. 4 2005 - Vol.16 No. 1, No. 2, No. 3-4 2004 - Vol.15 No. 1, No. 2, No. 3, No. 4 2003 - Vol.14 No. 1, No. 2, No. 3, No. 4 2002 - Vol.13 No. 1, No. 2, No. 3, No. 4 2001 - Vol.12 No. 1, No. 2, No. 3, No. 4 |