Hua-Kun Mai

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In NH4Cl-NH3 H2O buffer solution of pH 10.4, diazo salt of p-sulfodiazoben-zene chloride reacts with rutin, morin, genistin, quercetin, hesperidin, baicalin and daidzin to form color azo-compounds. These azo-compounds have an absorption maximum at 430 nm except for baicalin azo-compound, which has an absorption maximum at 380 nm. The sensitivity of azoic(More)
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