Journal of Chromatography A, ( ISI ), Volume (1216), No (1), Year (2009-5) , Pages (5086-5091)

Title : ( Determination of 3-nitroaniline in water samples by directly suspended droplet three-phase liquid-phase microextraction using 18-crown-6 ether and high-performance liquid chromatography )

Authors: Ali Sarafraz Yazdi , F. Mofazzeli , Z. Es’haghi ,

Citation: BibTeX | EndNote

Abstract Liquid–liquid–liquid microextraction (LLLME) with directly suspended droplet in high-performance liquid chromatography (HPLC) has been applied as a new, rapid and easy method for the determination of 3-nitroaniline in environmental water samples. The target compound was extracted from the aqueous sample solution (donor phase, pH 13) into an organic phase and then was back-extracted into a directly suspended droplet of an acidic aqueous solution (acceptor phase, pH 0.3). In thismethod,without using a microsyringe as supporting device, an aqueous large droplet is freely suspended at the top-center position of an immiscible organic solvent, which is laid over the aqueous sample solution while being agitated.Then, the droplet was withdrawn into the microsyringe and directly was injected into the HPLC system with UV detection at 227 nm. Up to 148-fold enrichment of the analyte could be obtained under the optimal conditions [i.e. donor phase: 0.1M sodium hydroxide solution (4.5mL); organic phase: o-xylene/1-octanol (90:10, v/v; 250 L); acceptor phase: 0.5M hydrochloric acid and 500mM 18-crown-6 ether (6 L); extraction time: 60 s; back-extraction time: 6min and stirring rate: 600 rpm]. The limit of detection was 1 g/L (n = 7) and the relative standard deviation (RSD, n = 5) was 4.9 at S/N= 3. The calibration graph was linear in the range of 5–1500 g/L with r = 0.9983. All experiments were carried out at room temperature (22±0.5 ◦

Keywords

, Keywords: Liquid–liquid–liquid microextraction (LLLME), Directly suspended droplet, 3-Nitroaniline Water
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@article{paperid:1013565,
author = {Sarafraz Yazdi, Ali and F. Mofazzeli and Z. Es’haghi},
title = {Determination of 3-nitroaniline in water samples by directly suspended droplet three-phase liquid-phase microextraction using 18-crown-6 ether and high-performance liquid chromatography},
journal = {Journal of Chromatography A},
year = {2009},
volume = {1216},
number = {1},
month = {May},
issn = {0021-9673},
pages = {5086--5091},
numpages = {5},
keywords = {Keywords: Liquid–liquid–liquid microextraction (LLLME);Directly suspended droplet;3-Nitroaniline Water analysis},
}

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%0 Journal Article
%T Determination of 3-nitroaniline in water samples by directly suspended droplet three-phase liquid-phase microextraction using 18-crown-6 ether and high-performance liquid chromatography
%A Sarafraz Yazdi, Ali
%A F. Mofazzeli
%A Z. Es’haghi
%J Journal of Chromatography A
%@ 0021-9673
%D 2009

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