Abstract
The ion-sensitive surface of the liquid-state electrode is formed by a very thin layer of an organic liquid, adsorbed at the surface of porous graphite. The composition of this organic phase, which must be immiscible with water, can be chosen so that the electrode responds only to the activity of a certain ion in the measured aqueous sample. The performance and construction of a liquid-state electrode with solutions of iodine in carbon tetrachloride, benzene and mesitylene as the organic phase is described. The electrode is suitable for measurement of iodide activities down to 10 −6 M; it has selectivity ratios for iodide over bromide of about 10 −3 and over chloride ion of better than 10 −4. In contrast to the solid-state iodide-selective electrode (AgI/Ag 2S membrane), the liquid-state electrode is not sensitive to light at any level of the iodide activities studied, but it is sensitive to species which would reduce iodine to iodide.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
