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Journal of Spectroscopy
Volume 2014 (2014), Article ID 832398, 4 pages
http://dx.doi.org/10.1155/2014/832398
Research Article

Use of Dispersive Liquid-Liquid Microextraction and UV-Vis Spectrophotometry for the Determination of Cadmium in Water Samples

Department of Applied Chemistry, Faculty of Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 1072, 20800 San Sebastian, Spain

Received 16 January 2014; Revised 13 May 2014; Accepted 13 May 2014; Published 26 May 2014

Academic Editor: Lu Yang

Copyright © 2014 J. Pérez-Outeiral et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A simple and inexpensive method for cadmium determination in water using dispersive liquid-liquid microextraction and ultraviolet-visible spectrophotometry was developed. In order to obtain the best experimental conditions, experimental design was applied. Calibration was made in the range of 10–100 μg/L, obtaining good linearity (R2 = 0.9947). The obtained limit of detection based on calibration curve was 8.5 μg/L. Intra- and interday repeatability were checked at two levels, obtaining relative standard deviation values from 9.0 to 13.3%. The enrichment factor had a value of 73. Metal interferences were also checked and tolerable limits were evaluated. Finally, the method was applied to cadmium determination in real spiked water samples. Therefore, the method showed potential applicability for cadmium determination in highly contaminated liquid samples.