Flow injection analysis for residual chlorine using Pb(II) ion-selective electrode detector.
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.
Sakai
A
A
R&D Division, DKK Corporation, Kitamachi, Kichijoji, Musashino 180, Japan.
Hemmi
A
A
Hachiya
H
H
Kobayashi
F
F
Ito
S
S
Asano
Y
Y
Imato
T
T
Fushinuki
Y
Y
Taniguchi
I
I