Flow injection analysis for residual chlorine using Pb(II) ion-selective electrode detector |
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Authors: | Sakai A Hemmi A Hachiya H Kobayashi F Ito S Asano Y Imato T Fushinuki Y Taniguchi I |
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Affiliation: | R&D Division, DKK Corporation, Kitamachi, Kichijoji, Musashino 180, Japan. |
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Abstract: | A simple flow injection analysis (FIA) system for residual chlorine in tap water has been developed by using a Pb(II) ion-selective electrode (ISE) detector. The method is based on a specific response of the Pb(II)-ISE to residual chlorine. The FIA system consists of a millivolt meter, a peristaltic pump, a Pb(II)-ISE detector and a recorder. A linear working curve between peak height and concentration of residual chlorine was obtained from 0.1 to 1 mg l(-1) for the developed FIA system. The relative standard deviation for repeated injections of a 0.2 mg l(-1) residual chlorine sample was 2%. The regression line and its correlation factor between the conventional o-tolidine colorimetric method and the present method were Y=0.75X+0.17 and 0.967, respectively, for this determination. |
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