Flow Injection Determination of Oxalate Based on Its Catalytic Effect on the Oxidation of p-Chloride Aniline by Dichromate

Chemical Research in Chinese Universities ›› 2001, Vol. 17 ›› Issue (3): 253-258.

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Flow Injection Determination of Oxalate Based on Its Catalytic Effect on the Oxidation of p-Chloride Aniline by Dichromate

LI Li-jun, WEI Hong-guang, ZHANG Ying

Guangxi Institute of Technology, Liuzhou 545006, P. R. China

Received:2001-05-16 Online:2001-08-24 Published:2011-08-04
Supported by:
Supported by Guangxi Natural Science Foundation of China(No.0135002).

Abstract

Abstract: In a sulfuric acid medium, oxalate exhibits a strong catalytic effect on the oxidation of p-chloride aniline (ClBN) by dichromate, and the red oxidation product of ClBN has a maximum absorbancy at 520 nm.Based on this founding, a new FI method for determining oxalate was developed.A calibration curve of oxalate in the range of 0.40-17.0 tg/mL was obtained.The detection limit was 0.10 μg/mL.Sampling rate was 103-samples/h.The possible interference by the co-existing substances or ions was examined.This new method was applied to the determination of micro amounts of oxalate in real samples with satisfactory results.

Key words: FIA, Oxalate, p-Chloro aniline, Potassium dichromate

LI Li-jun, WEI Hong-guang, ZHANG Ying. Flow Injection Determination of Oxalate Based on Its Catalytic Effect on the Oxidation of p-Chloride Aniline by Dichromate[J]. Chemical Research in Chinese Universities, 2001, 17(3): 253-258.

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Flow Injection Determination of Oxalate Based on Its Catalytic Effect on the Oxidation of p-Chloride Aniline by Dichromate

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