The Open Process Chemistry Journal

2010, 3 : 1-6
Published online 2010 January 15. DOI: 10.2174/1875180601003010001
Publisher ID: TOCPCJ-3-1

RESEARCH ARTICLE
 A Novel Liquid-Liquid Microextraction Based on Solidification of Floating Organic Droplet Method for Determination of Phenols in Aqueous Samples

H Faraji1, * , M Mirzaee 2 , F Sorkheh 2 , M Helalizadeh 2 and A.A Tabrizi 2
1 Department of Chemistry, Islamic Azad University Varamin branch, Varamin, Iran
2 Young researchers club, Islamic Azad University Varamin branch, Varamin, Iran

* Address correspondence to this author at the No 14, Mahdieh 5, Varamin, Iran; P-Code: 3371786837; Tel: +98 292 222 6954; Fax: +98 292 222 4767; E-mail: hakimfaraji@yahoo.com

ABSTRACT

Pre-concentration and determination of 7 phenolic compounds in water samples has been achieved using a new liquid-liquid microextraction coupled HPLC-DAD. Microextraction efficiency factors have been investigated and optimized: 14 µL 1-undecanol micro drop exposed for 15 min floated on surface of a 20 mL water sample at 55°C, stirred at 1200 rpm, low pH level and saturated salt conditions. Under the selected conditions, limit of detection of 0.5- 3.0 µg L-1 (S/N=3) and linearity range of 0.3-870 µg L-1 have been obtained. A reasonable repeatability (RSD ≤ 10.1%, n=5) with satisfactory linearity (0.9992 ≥ r2 ≥ 0.9973) of results illustrated a good performance of the present method. The relative recovery of different natural water samples was higher than 84%.

Keywords:

Phenols, LPME, Water sample, HPLC-DAD.