CRCU

Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (6): 957-962.

• Articles • Previous Articles     Next Articles

Development of a Poly(vinyl chloride)-based Nitrate Ion-selective Electrode

HE Meng-meng, YANG Hui-zhong   

  1. Key Laboratory of Advanced Control in Light Industry Process, Ministry of Education, Jiangnan University, Wuxi 214122, P. R. China
  • Received:2012-02-13 Revised:2012-03-13 Online:2012-11-25 Published:2012-11-09
  • Contact: HE Meng-meng E-mail:hemengmenghmm@126.com
  • Supported by:

    Supported by the Project of Wuxi Pollution Prevention Funding Agency, China(No.2008-1).

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Abstract:

The authors developed a nitrate ion-selective electrode(ISE) based on poly(vinyl chloride)(PVC) membrane with methyltrioctylammonium nitrate as a carrier and 1-decanol as a plasticizer. The performance of the nitrate-sensitive membranes was optimized by tuning the composition of components. The electrode exhibits a linear response with a Nernstian slope of (52±1.0) mV per decade for the nitrate ion concentration ranging from 5.8×10-5 mol/L to 1.0 mol/L. The electrode can be used to detect a low concentration of nitrate ions down to 3×10-5 mol/L in a pH range of 2.1-11.5 without any compensation. The advantage of the electrode includes simple preparation, short response time and good repeatability. The detection performance of the novel electrode on nitrate ions has been tested for water samples.

Key words: Poly(vinyl chloride)(PVC), Methyltrioctylammonium nitrate, Nitrate-selective electrode, Potentiometric sensor