Many organic compounds such as benzene, its derivatives and simple halogenated hydrocarbons cannot be detected by usual amperometric sensors. Their detection, however, is possible by means of their adsorption at a Pt-sensor electrode. The charge is automatically determined during a subsequent sweep
Adsorption and concomitant phenomena—IV. Specific adsorption of halogen ions and some aromatic hydrocarbons
✍ Scribed by E.B. Weroński
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 780 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
A&tract-Experimental
results suggest that the relative surface activity at the mercury/solution interface of the non-specifically-adsorbing camphor is at least two orders of magnitude higher than that of the "specifically" adsorbing halogen ions, even in the case of iodide. In the case of naphthalene, anthracene and phenanthrene the adsorption on mercury due to specific forces is weak as compared with that due to non-speci& forces and their specific adsorption is more strongly a&c&d by the solution composition than the non-specific adsorption.
RBsomB
--Les r&sultats experimentauxsugg&ent que l'activit6relativede surface ducamphre adsorbant non-sp&Squement sur le mercure est au mains deux ordres plus grande que oelle des substance8 adsorbantes "sp&iiquement", comme les ions haloeures, m&ne les ions iodures. Dans le cas du naph&&ne, de l'antbra&e et du l'aide des forces non-spfiques et @cl ques, mais l'adsorption specifique de ces substances at .P h&ntr&ne l'adsorption sur le metcure s'accomplit & g plus haut de@ sensible B la composition du solvant que celle des substances adsorb&s non-sp&ifiquemerlL Zusammenf assung-Experimentelle Ergebnisse zeigen, dass an der Quecksilberoberfl~he die Ober-B&henakCtiit des nicht spezilisch adsorbierten Kampfers mind&ens um zwei Gr&senordmmgen h6her ist als die der spezifisch adsorbierten Halogenionen, such wenn es sich bei diesen um das Iodidion handelt. Im Falle von Naphtalin, Anthrazen und Phenanthren stellt man fest, dass die nicht-spezifischen KrUte eine stiirkere Adsorption an der Quecksilberobe&che bewirken als die spezifischen. Die spezhische Adsorption der genannten Verbindungen ist in gr6sserem Masse von der Zusammensetzung der Lxisung abhtigig als die nicht-spezifiscbe.
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The specific adsorption of radiolabeled phosphate ions from perchlorate supporting electrolyte onto gamma-Al2O3 and hematite powder has been investigated. The pH dependence of the adsorption of phosphate species was compared with that of sulfate ions. It was demonstrated that in contrast to the beha