Continuous flow determination of chloride in the non-linear response region with a tubular chloride ion-selective electrode.
A microcomputer-aided continuous-flow system was constructed for the determination of chloride in the non-linear electrode-response region from 10 to 0.1 mg/l. Interpolation by spline function was used to calculate the concentration from the measured potential. As few as four points were enough to obtain a practical calibration curve, plotted as Evs. log c. The interferences of bromide and iodide (at weight ratios <0.1 to chloride) could be removed by adding colloidal silver chloride continuously in the flow stream. Analysis of rain and snow containing 0.07-8.8 mg/l. chloride showed fairly good agreement with that by ion-chromatography.
Hara
H
H
Laboratory of Chemistry, Faculty of Education, Shiga University, Otsu, Shiga 520, Japan.
Wakizaka
Y
Y
Okazaki
S
S