Continuous Determination of Free Cyanide by Means of Membrane Diffusion of Gaseous HCN and An Electrode Indicator Technique
- 1 January 1977
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 10 (12) , 961-978
- https://doi.org/10.1080/00032717708059252
Abstract
A continuous measurement system for free cyanide has been developed based on the principle of diffusion across a gas-permeable membrane to affect the separation of hydrogen cyanide from the acidified sample solution. The cyanide absorbed in the alkaline indicator solution is subsequently analyzed by an indirect technique using a silver ion-selective electrode. In the concentration range of 30 to 400 μg CN−/L, the accuracy and precision of this method is approximately two percent. The detection limit of this system is approximately 0.5 μg CN−/L.Keywords
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