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  • Title: Determination of rhodanese enzyme activity by capillary zone electrophoresis.
    Author: Glatz Z, Bouchal P, Janiczek O, Mandl M, Cesková P.
    Journal: J Chromatogr A; 1999 Apr 09; 838(1-2):139-48. PubMed ID: 10327635.
    Abstract:
    A new sensitive method has been developed for the determination of rhodanese activity. The enzymatic reactions were carried out directly in thermostatted autosampler vials and the formation of SCN- was monitored by sequential capillary zone electrophoretic runs. The determinations were performed in a 75-micron fused-silica capillary using 0.1 M beta-alanine-HCl (pH 3.50) as a background electrolyte, a separation voltage of 18 kV (negative polarity), a capillary temperature of 25 degrees C and direct detection at 200 nm. Short-end injection or long-end injection procedures were used for sample application. The method is rapid, able to be automated and requires only small amounts of sample and substrates, which is especially important in the case of highly toxic cyanide. The developed capillary electrophoretic method also has great potential for thiocyanate determinations in other applications.
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