Determination of Nitrates in Water Samples by In-Electrode Coulometric Titration in Copper Coated Porous Vitreous Carbon Electrode
Nitrate in water samples was determined by in‐electrode coulometric titration in porous electrode made of vitreous carbon particles coated with copper. The sample was mixed with diluted sulfuric acid containing 1 mmol/L hydrochloric acid, the solution was filled into the cell and electrode and the n...
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Published in | Electroanalysis (New York, N.Y.) Vol. 27; no. 6; pp. 1473 - 1478 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.06.2015
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | Nitrate in water samples was determined by in‐electrode coulometric titration in porous electrode made of vitreous carbon particles coated with copper. The sample was mixed with diluted sulfuric acid containing 1 mmol/L hydrochloric acid, the solution was filled into the cell and electrode and the nitrate ions were directly reduced by constant current to ammonium ions. The stoichiometry of the electrode reaction was found by coulometric and photometric measurements. The detection limit and precision were found to be 0.2 mg/L and 1.7 %, respectively. The interfering effect of high chloride contents was eliminated by precipitating chlorides with silver sulfate. The method was applied for the analysis of various water samples and beverages. The results were in good agreement with data from isotachophoretic and photometric measurements. |
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Bibliography: | Slovak Grant Agency VEGA - No. 1/0419/12 ark:/67375/WNG-T64Z6X6B-3 APVV - No. APVV-0797-11 ArticleID:ELAN201400679 istex:771DF539075B7EB62B9E85A109A93F71E85450A8 Competence Center for SMART Technologies for Electronics and Informatics Systems and Services - No. ITMS 26240220072 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1040-0397 1521-4109 |
DOI: | 10.1002/elan.201400679 |