Cyanide ion selective electrodes from three manufacturers were evaluated.The investigation consisted of determination of calibration curves five times at intervals of two weeks and measurement of the selectivity coefficients for the chloride, bromide, iodide, and thiosulfate ions.No significant differences between different makes were found.The measurement ranges of the electrodes were found to be from 10 3 to 10 7 mol/dm3.The upper limit is deterrnined by rapid dissolution of the membrane.The potentials of the electrodes were very stable and reproducible.The behaviour of the electrodes towards interfering ions followed theoretical predictions and was according to the manufacturers information.Also the effect of pH was studied and a peculiar phenomenon in this respect was noted.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||24|
|Publication status||Published - 1981|
|MoE publication type||Not Eligible|
|Series||Technical Research Centre of Finland. Publications|
Virtanen, R. (1981). Evaluations of commercial ion selective electrodes: 2. The cyanide ion selective electrode. VTT Technical Research Centre of Finland. Technical Research Centre of Finland. Publications , No. 5