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高等学校化学研究 ›› 2001, Vol. 17 ›› Issue (3): 253-258.

• Articles • 上一篇    下一篇

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   

  1. Guangxi Institute of Technology, Liuzhou 545006, P. R. China
  • 收稿日期:2001-05-16 出版日期:2001-08-24 发布日期:2011-08-04
  • 基金资助:

    Supported by Guangxi Natural Science Foundation of China(No.0135002).

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   

  1. 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).

PDF (PC)

摘要： 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.

关键词: FIA, Oxalate, p-Chloro aniline, Potassium dichromate

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