Solid-phase reagent for analgin and ascorbic acid on the basis of a copper(II) complex with tetrabenzotetraazacyclohexadecine immobilized by adsorption on silica gel

The reactions of a number of natural organic reducing agents with a copper( II) complex with tetrabenzo[b, f, j, n] [1, 5, 9, 13]tetraazacyclohexadecin e adsorbed on silica were examined. A solid-phase reagent was proposed for the sorption-spectrophotometric determination of Analgin and ascorbic acid (c(min) = 0.91 and 0.06 mg/L, respectively) and for the visual test determi nation of the above compounds (c(min) = 0.50 and 0.025 mg/sample, respectiv ely).