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Updated: Mar 1, 2026

On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes
Published on: August 5, 2016
Switchable-hydrophilicity solvent-based microextraction combined with gas chromatography for the determination of
Jamileh Rameshgar1, Kobra Sadat Hasheminasab2, Laleh Adlnasab3
1Department of Chemistry, Faculty of Science, University of Zabol, Zabol, Iran.
Abstract:
A simple, fast, sensitive, and low-cost method was developed for the quantification of nitroaromatic compounds in water samples based on CO2 -assisted liquid-phase microextraction using a switchable-hydrophilicity solvent followed by gas chromatography detection. Dipropylamine was used as extraction solvent with switchable hydrophilicity that can be miscible or immiscible upon the addition or removal of CO2 as a reagent. Experimental parameters affecting the extraction efficiency such as the volume of acceptor phase, the volume of donor phase, pH of donor phase, ionic strength, and extraction time were investigated. Under the optimal conditions, detection limits and preconcentration factors were obtained in the ranges of 0.9-1.8 μg/L and 132-138, respectively. Also, the extraction recoveries of water samples were above 88%. Finally, the developed method was successfully applied to the determination of nitroaromatic compounds in real water samples.
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