Authors: Ali A Ensafi, A Kazemzadeh

Publication date: 2000/7/1

Journal name: Fresenius' journal of analytical chemistry

Volume:: 367

Pages: 590-592

Publisher: Springer-Verlag

Abstract A new simple, sensitive and rapid catalytic-spectrophotometric method for the
determination of oxalic acid has been described based on its catalytic effect on the redox
reaction between dichromate and Brilliant cresyl blue in acidic media by means of a flow
injection analysis method. The color change of Brilliant cresyl blue due to its oxidation was
monitored spectrophotometrically at 625 nm. The calibration graph was linear in the range of
0.020–4.70 μg/mL oxalic acid with a limit of detection 0.005 μg/mL of oxalic acid. The ...