| Title: | Analysis of n-alkanes in water samples by means of headspace solvent microextraction and gas chromatography |
| Author(s): | Zanjani MK; Yamini Y; Shariati S; |
| Address: | "Department of Chemistry, School of Sciences, Tarbiat Modarres University, P.O. Box 14115-175, Tehran, Iran" |
| DOI: | 10.1016/j.jhazmat.2006.01.004 |
| ISSN/ISBN: | 0304-3894 (Print) 0304-3894 (Linking) |
| Abstract: | "A simple and efficient headspace solvent microextraction (HSME) was developed for the simultaneous determination of the trace concentrations of some n-alkanes in water samples. Therefore, a microdrop of an organic solvent was extruded from the needle tip of a gas chromatographic syringe to the headspace above the surface of the solution in a sealed vial. Then the volatile organic compounds are extracted and concentrated in the microdrop. Next, the microdrop was retracted into the microsyringe and injected directly into the gas chromatograph. Experimental parameters which control the performance of HSME such as the type of microextraction solvent, organic drop and sample volume, sample stirring rate, sample solution and microsyringe needle temperatures, salt addition and exposure time profiles were investigated and optimized. Finally, the enrichment factor, dynamic linear range (DLR), limit of detection (LOD) and precision of the method were evaluated. Using optimum extraction conditions, good linearity with correlation coefficients in the range of 0.995 |
| Keywords: | "Alkanes/*analysis Chromatography, Gas Fresh Water Indicators and Reagents Reproducibility of Results Seawater/analysis Solutions Solvents Temperature Waste Disposal, Fluid Water Water Pollutants, Chemical/analysis Water Supply/*analysis;" |
| Notes: | "MedlineZanjani, Mohammadreza Khalili Yamini, Yadollah Shariati, Shahab eng Netherlands 2006/02/14 J Hazard Mater. 2006 Aug 25; 136(3):714-20. doi: 10.1016/j.jhazmat.2006.01.004. Epub 2006 Feb 15" |
