Abstract
The determination of small organic acids in a variety of industrial samples by capillary electrophoresis was accomplished using a phthalate buffer and indirect UV detection. Various parameters affecting the analysis, including the composition and pH of the electrolyte, were optimized so that fast, sensitive and robust separation were possible. The sensitivity, limit of detection and reproducibility of the method were evaluated under optimized conditions. The method was found to be applicable to a wide variety of samples, ranging from simple aqueous solutions to complex plant organic streams. Comparison of this method to an ion chromatographic method used previously indicates that the CE technique offers a number of attractive features which significantly improve the efficiency and productivity of the organic acid analysis.
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