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- W2373041794 abstract "A simple, rapid and sensitive catalytic kinetic spectrophotometric method for the determination of ascorbic acid was proposed. The diazo _ salt can be produced by the diazotized reaction between p _ amino _ benzenesulfonic acid and nitrite. Ascorbic acid catalyzes the decomposition of the diazo _ salt. The catalytic reaction rate is related to the concentration of ascorbic acid. Oxine was added into solution to end the reaction by coupling with the diazo _ salt and producing azo _ dye. The absorbancy(A) of the system and blank was detected at 495 nm in NH3-NH4Cl buffer solution of pH 9. The linear relationship between ΔA and concentration of ascorbic acid was found in the range of 0.16～6.3 mg/L, and detection limit is 0.005 mg/L. The method was used to determine ascorbic acid in vitamin C tablets and litchi powder. The experimental results agreed with those obtained by iodimetry." @default.
- W2373041794 created "2016-06-24" @default.
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- W2373041794 date "2001-01-01" @default.
- W2373041794 modified "2023-09-24" @default.
- W2373041794 title "Catalytic Kinetic Spectrophotometry for theDetermination of Ascorbic Acid" @default.
- W2373041794 hasPublicationYear "2001" @default.
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