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Journal of Automated Methods and Management in Chemistry
Volume 2011 (2011), Article ID 943465, 7 pages
http://dx.doi.org/10.1155/2011/943465
Research Article

Development of a Low-Cost SIA-Based Analyser for Water Samples

1DEC, Analytical Chemistry, School of Chemistry, University of the Republic (UdelaR), Avenue Gral.Flores 2124, 11800 Montevideo, Uruguay
2DETEMA, Instruments Workshop, School of Chemistry, University of the Republic (UdelaR), Avenue Gral.Flores 2124, 11800 Montevideo, Uruguay

Received 30 March 2011; Accepted 24 May 2011

Academic Editor: Miren Lopez de Alda

Copyright © 2011 Moisés Knochen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An automated multiparametric water analyser was developed and evaluated. The system was based on Sequential Injection Analysis and featured a photometric detection system comprising a tricolour RGB LED source and a photodiode. A program compiled in Visual Basic was used to control the SIA flow system, the LEDs, and the data acquisition and processing. The program loads and executes methods written in ASCII and stored as text files. The system was capable of handling up to four methods simultaneously. When used to carry out methods based on the APHA standard methods, the figures of merit obtained were considered satisfactory for the purpose. The total cost was under US $4600. It was concluded that the analyser is appropriate for routine use and has potential for an increased number of simultaneous methods and for enhanced capabilities if new versions of the software are developed.