Catalytic fluorimetric determination of trace oxalate

A new catalytic fluorimetric method for the determination of trace oxalate has been developed. The method is based on the catalytic effect of oxalate on the oxidation of potassium dichromate with rhodamine B in sulfuric acid medium. The catalytic reaction takes place at 50 degrees C for 10 min in a...

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Bibliographic Details
Published inGuang pu xue yu guang pu fen xi Vol. 23; no. 1; p. 203
Main Authors Chen, Lan-hua, Zhao, Dan-hua
Format Journal Article
LanguageChinese
Published China 01.02.2003
Subjects
Catalysis
Fluorometry - methods
Luminescent Measurements
Oxalates - analysis
Oxidation-Reduction
Potassium Dichromate - chemistry
Rhodamines - chemistry
Spinacia oleracea - chemistry
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Summary:A new catalytic fluorimetric method for the determination of trace oxalate has been developed. The method is based on the catalytic effect of oxalate on the oxidation of potassium dichromate with rhodamine B in sulfuric acid medium. The catalytic reaction takes place at 50 degrees C for 10 min in a water bath and is a pseudo-zero-order reaction. The regression equation of calibration graph is delta F = 8.42c (mg.L-1) + 3.81 (r = 0.9983), and measuring range is 0.4-12.0 mg.L-1, and the detection limit is 0.16 mg.L-1. Interferences of 30 diverse materials were examined. The method has been applied to the determination of oxalate in biological samples with satisfactory results.
ISSN:1000-0593