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An azophenolic colorimetric reagent for use in enzyme-linked immunosorbent assays.
(Elsevier: Analytical Biochemistry, 1987-08-01)
A colorimetric reagent, 4-(4'-nitro-2'-methylsulfonylphenylazo)phenyl phosphate (NMPP), has been shown to be an effective substrate of alkaline phosphatase. NMPP and p-nitrophenyl phosphate were applied in comparative ...