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Preparation and Study the nitrate Selective Electrode based on Quaternary ammonium salts in PVC matrix membrane | ||
| journal of kerbala university | ||
| Article 1, Volume 7, Issue 2, 2011, Pages 113-118 PDF (0 K) | ||
| Abstract | ||
| Several nitrate electrodes were constructed based on PVC matrix membrane consist of alkyl quaternary ammonium cations [Tetra-n- Octyl Ammonium Chloride(TOA-CL),Tetran-n- heptyl ammonium chloride (THA-CL)].They were tested as sensor with various mediators such as [di-n-butyl phthate (DBPH),tri –n-butyl phosphate(TBP) and o-nitro phenyl octyl ether(NPOE). The parameters for these electrodes (slope, concentration range, detection limit, life time, PH and selectivity) were studied. Through this study, these electrodes have good parameters, which can depend on it for determination of nitrate ion in water and other various samples. The Nernestian slope for these electrodes were ranged from 57.5 to 60.1mV/decade ,linear concentration ranged from 4×10-5M to 10-1M and detection limit ranged from 4×10-6M to10-5M. Relative error (RE) for these electrode was calculated for synthetic solution and determined the nitrate concentration by direct method and standard addition methods | ||
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