Journal of Chromatography A 2006-09-22

Separation and determination of perfluorinated carboxylic acids using capillary zone electrophoresis with indirect photometric detection.

Lena Wójcik, Katarzyna Korczak, Bogdan Szostek, Marek Trojanowicz

Index: J. Chromatogr. A. 1128(1-2) , 290-7, (2006)

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Abstract

Perfluorinated carboxylic acids (PFCAs) belong to anthropogenic fluoroorganic compounds that have been detected in the natural environment and living organisms including humans. A capillary zone electrophoretic method with indirect UV detection using 2,4-dinitrobenzoic acid (2,4-DNBA) as a chromophore probe has been developed for analysis of PFCAs (C6-C12) in water. Optimal analyte resolution and detection sensitivity was obtained with 50 mM Tris solution of pH 9.0 and 50% methanol as a background electrolyte (BGE). The baseline separation of C6-C12 PFCAs was obtained within 20 min with detection limits in the range from 0.6 to 2.4 ppm.