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AWWA WQTC71340
- Comparison of On-line Chlorine Analysis Methods and Instrumentation Built on Amperometric and Colorimetric Technologies
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
$12.00$24.00
This study evaluated the accuracy of amperometrictechnology for measuring chlorine residual concentrations in practical applications relative to thereference colorimetric method. The authorsanalyzed responses of several colorimetric and amperometric analyzers to changes introduced to the samesample. The comparison was conducted anonymously, the sample conditions were tightly controlled, andthe tests included, but were not limited to, the following parameters: response time; LOD/LOQ; short-term andlong-term repeatability; and, pH and conductivity dependence. The study was conducted according to theguidelines of the ISO method for process analyzers evaluation (ISO 15839:2003). In the course ofpresenting the study results and discussion, the authors made several observations indicating thatperformance specifications of online amperometric analyzers are often overstated by the manufacturers.The main conclusion of the study was that, in general, colorimetric systems performed better comparedto amperometric/polarographic systems. Includes 6 references, tables, figures.
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