Application of 2,2-Dipyridyldisulphide for Specific Determination of Glutathione during Micellar Electrokinetic Chromatography

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Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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GLATZ Zdeněk MAŠLAŇOVÁ Hana

Rok publikování 1999
Druh Článek ve sborníku
Konference Proceeding of 13th International Conference
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Obor Biochemie
Klíčová slova Glutathione; MEKC; 2;2-dipyridyldisulphide
Popis The on-column reaction of glutathione with the reactive disulphide 2,2-dipyridyldisulphide was used for the specific detection of glutathione during micellar electrokinetic chromatography: In this set-up the front end of the capillary is used as the reaction chamber. 2,2-dipyridyldisulphide and a sample of glutathione are injected consecutively in the capillary as two discrete plugs separated with short plug of background electrolyte. Due to the differences in the mobilities of the 2,2-dipyridyldisulphide and glutathione on column mixing and reaction occur. This reaction is rapid and quantitative, because thiol form is stabilised by thiol-thione tautomerism. This fact also causes a large shift of the absorption maxima toward longer wavelength. Glutathione is thus quantitatively transformed into a mixed disulphide concomitantly with formation of equimolar amounts of the 2-thiopyridone that is further separated by micellar electrokinetic chromatography and determined spectrophotometrically at 343 nm.
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