Flow injection spectrofluorimetric determination of oxalate based on its enhancing effect on the oxidation of Rhodamine B by dichromate

Abstract

A flow injection configuration for the spectrofluorimetric determination of oxalate is proposed. The procedure is based on the enhancing effect of oxalate on the oxidation of Rhodamine B by dichromate. The proposed method is simple, inexpensive, sensitive and suitable for concentrations of oxalate between 1.76 and 88 µg ml^–1. The applicability of the method was demonstrated by the determination of oxalate in food and urine samples.