University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Classification: Vegetable -> mushroon

Citations 1

"Flow Injection Catalytic Spectrophotometric Determination Of Oxalic Acid Using The Redox Reaction Between Victoria Blue B And Dichromate"
Anal. Chim. Acta 2000 Volume 406, Issue 2 Pages 303-308
Zhi-Qi Zhang and Xiao-Qin Xu

Abstract: A flow injection catalytic method is developed for the determination of oxalic acid based on its catalytic effect on the redox reaction between Victoria blue B and potassium dichromate in dilute sulfuric acid medium. The reaction is monitored spectrophotometrically by measuring the decrease in the absorbance of Victoria blue B at the maximum absorption wavelength of 618 nm. A calibration graph from 1.0 to 80.0 µg mL-1 of oxalic acid and a detection limit of 0.8 µg mL-1 was obtained. The sampling rate was about 22 samples per hour. The proposed method is simple and inexpensive. The applicability of the method was demonstrated by the determination of oxalic acid in vegetable food, such as spinach and mushroom.
Oxalic acid Spectrophotometry Catalysis Indirect