Analytisches Vielschichtelement, primären Aminpuffer enthaltend und Verfahren zur Bestimmung von Ethanol

摘要

A multilayer analytical element has been prepared for accurate and rapid colorimetric determination of ethanol in aqueous specimens using alcohol dehydogenase and an oxidized nicotinamide coenzyme. The element includes three reagent layers beneath a porous spreading layer. The middle reagent layer has a crosslinked hydrophilic binder, while the other two reagent layers have uncrosslinked binders. In addition, both uncrosslinked reagent layers include a relatively high amount of a buffer having a primary amine, which buffer maintains the layer pH at from 8 to 10. Alcohol dehydrogenase is in the reagent layer next to the porous spreading layer.