engleski

DETERMINATION OF CATIONS IN NATURAL WATERS USING ELECTROPHORESIS ON MICROCHIP WITH C4D DETECTOR

Capillary electrophoresis (CE) is a highly efficient separation technique for quantitation of different charged compounds. Electrophoresis on microchip (MCE) is a miniaturized version of the CE [1]. Alkali metals are routinely monitored in a variety of aqueous samples, which are important to several industries such as the drinking and waste water industries [2]. In this investigations a MCE device with capacitively coupled contactless conductivity detection (C4D) was successfully applied for analysis of several alkali cations, individually and in mixture. The influence of the following parameters on the separation ability was investigated: injection time, injection voltage, separation time and separation voltage. The linear response region for each particular cation investigated, both single and in a mixture, was determined using linear regression. The method was applied for determination of alkali cations in natural water.

electrophoresis on microchip ; alkali metals ; C4D ; natural waters

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