Conductometric determination of ammonium by a multisyringe flow injection system applying gas diffusion
| Autor: | Víctor Cerdà, Burkhard Horstkotte, Camelia Henríquez |
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| Přispěvatelé: | Ministerio de Ciencia e Innovación (España), Universidad de Las Islas Baleares, European Commission, Govern de les Illes Balears |
| Rok vydání: | 2013 |
| Předmět: |
Health
Toxicology and Mutagenesis Flow (psychology) Analytical chemistry Soil Science Analytical Chemistry Ammonia chemistry.chemical_compound conductometric detection natural waters multisyringe flow injection analysis Environmental Chemistry Gaseous diffusion Ammonium Waste Management and Disposal Water Science and Technology gas diffusion Chromatography Aqueous solution Public Health Environmental and Occupational Health Pollution Working range Volumetric flow rate ammonium chemistry Reagent |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1029-0397 0306-7319 2010-1554 |
| DOI: | 10.1080/03067319.2012.746322 |
| Popis: | A multisyringe flow injection system (MSFIA) coupled to a gas-diffusion cell has been developed for the conductometric determination of ammonium in different water samples. Operation strategies, membrane, reagent concentrations, and flow rates have been studied to optimize the sensitivity of detection and to fit the required working range. The proposed MSFIA system has been compared with former FIA and SIA systems using gas diffusion. The system was applied to the determination of ammonium in water samples of different matrices in order to evaluate its performance. These samples were coastal waters, pond waters, and compost aqueous extracts. Good recoveries of 102 ± 13% were obtained and no significant differences with the reference methods were found. The system can be used for a wide concentration range of ammonia, from 0.075 to 360 mg L-1, without sample dilution and with a precision better than 2% of RSD. The throughput of the method was 32 injections per hour. © 2013 Copyright Taylor and Francis Group, LLC. This work was supported by the Spanish ‘Ministerio de Ciencia e Innovación’, through the project CTQ2010-15541. C. Henríquez is very grateful to the ‘Conselleria d'Educació cultura I Universitat’ and the ‘Fondo Social Europeo’ for funding her PhD grant |
| Databáze: | OpenAIRE |
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