Electrophoretic behavior of aromatic-containing organic acids and the determination of selected compounds in water and soil by capillary electrophoresis
Brumley, W.C.; Brownrigg, C.M.
Journal of Chromatography 646(2): 377-389
The behavior of 56 aromatic-containing organic acids (ACOAs) was obtained under free zone electrophoresis and under micellar electrokinetic chromatography using cholic acid as the micellar agent. The compound classes encompass phenoxy acid herbicides, phenylalkanoic acids, aromatic carboxylic acids, aromatic sulfonic acids, azo and other dyes, and ACOAs containing nitrogen. Seven compounds were studied with respect to extraction and cleanup from spiked water and soil at levels of 1.0 and 0.1 mu-g/g and 100 and 20 mu-g/g, respectively. A general scheme of isolation and cleanup was developed that used extraction disks and solid-phase extraction cartridges. Average recoveries for three determinations ranged from 26.5 to 98.2% with relative standard deviations ranging from 6.7 to 55%.