FIELD: biochemistry.
SUBSTANCE: invention relates to biochemistry, specifically to devices for determining urea. Diagnostic plate comprises a quartz substrate, a polymer coating consisting of polyethylene imine, polystyrene sulphonate and polyallylamine, and urease-containing polyelectrolyte microcapsules.
EFFECT: invention provides rapid determination of urea content without using labor-intensive operations for extraction of detecting agents from the reaction medium and preparation thereof for the next analysis.
1 cl, 4 dwg, 1 tbl
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