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Type: Journal article
Title: Free chlorine analysers: a user's selection guide
Author: Badalyan, A.
Holmes, M.
Chow, C.
Vitanage, D.
Citation: Water, 2009; 36(6):67-73
Publisher: Australian Water Association Inc
Issue Date: 2009
ISSN: 0310-0367
Statement of
A. Badalyan, M. Holmes, C.W.K. Chow and D. Vitanage
Abstract: Selecting new instrumentation for integration into water quality monitoring programs is fraught with uncertainties and potential pitfalls. An evaluation methodology for assisting water managers and operators to make the correct choice of an online free chlorine (FC) analyser based on key performance parameters is presented. Eight amperometric and one colorimetric online FC monitors were evaluated against 15 metrological parameters (response, delay, rise and fall times, linearity, limit of quantification, day-to-day repeatability, the effect of interferences, etc.) according to the procedure outlined in the two standards: ISO Standards 8466-1 (1990) and 15839 (2003). The test results were compared with the analysers' technical characteristics supplied by their manufacturers. In general, colorimetric systems performed better than amperometric systems, with the latter experiencing significant interference from the pH of water which was not adjusted during tests. All analysers performed within manufacturers' claimed limits for some metrological parameters, whereas for other parameters their performance was not adequate. It is strongly encouraged to perform evaluation tests under conditions similar to those in the field before purchasing a monitor.
Keywords: Amperometric; evaluation methodologies; evaluation test; free chlorine; ISO standards; key performance parameters; limit of quantifications; metrological parameters; technical characteristics; test results; water managers; water quality monitoring
Rights: © 2009 AWA. All rights reserved.
RMID: 0020119670
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Appears in Collections:Institute for Mineral and Energy Resources publications

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