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- W2376213073 abstract "In a citrate buffer of pH 1.7 and heated for 10 min in boiling water bath,the oxidative color-fading of 5-Cl-PADAT by H_2O_2 was inhibited by traces of vanadium(Ⅴ).Difference of absorbance(ΔA) of solutions in the presence of V(Ⅴ)(A) and in the absence of V(Ⅴ)(A_0) measured at λ_(max) 460 nm kept a linear relationship with the concentration of vanadium(Ⅴ) in the range of 0-91.8 ng per 25 mL of solution.Its detection limit was found to be 7.19×10~(-9)g·L~(-1).Most of the common co-existing ions did not interfere the determination.Kinetic parameters of the oxidation reaction were also studied.It was concluded on the results of graphical integration that both the reaction with V(Ⅴ) and H_2O_2 or with H_2O_2 only,were of zero order.The apparent activity energy were found to be 61.6 kJ·mol~(-1) and 82.1 kJ·mol~(-1) for reactions of R+H_2O_2 and R+H_2O_2+V(Ⅴ) respectively.The optimum temperature of heating for the reaction was 100 ℃.RSD′s in the range from 1.8% to 2.6% and recoveries in the range from 98.1% to 105.0%,were found in the analysis of blood and tea samples." @default.
- W2376213073 created "2016-06-24" @default.
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- W2376213073 date "2006-01-01" @default.
- W2376213073 modified "2023-09-25" @default.
- W2376213073 title "STUDY ON THE INHIBITION OF OXIDATION-DECOLORATION REACTION BETWEEN 5-Cl-PADAT AND H_2O_2 BY VANADIUM(V) AND ITS APPLICATION TO PHOTOMETRIC DETERMINATION OF VANADIUM" @default.
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