Adsorption isotherm of a photographic emulsion for uranyl and lead ions
| Autor: | Engelbert Broda |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Ions
Multidisciplinary Drop (liquid) Radiochemistry Analytical chemistry chemistry.chemical_element Penetration (firestop) Uranium Uranyl chemistry.chemical_compound Adsorption chemistry Emulsion ÖFOS 2012 -- NATURAL SCIENCES (1) -- Chemistry (104) -- Chemistry (1040) -- Polymer chemistry (104018) Freundlich equation Emulsions Photographic emulsion ÖFOS 2012 -- NATURWISSENSCHAFTEN (1) -- Chemie (104) -- Chemie (1040) -- Polymerchemie (104018) |
| Zdroj: | Nature. 159(4059) |
| ISSN: | 0028-0836 |
| Popis: | Radioactive track count methods with photographic plates can be applied to the determination of nuclear reaction cross-sections, of nuclear particle fluxes, of decay constants and of small concentrations of certain elements1. The reactive nuclei can be introduced into the emulsion by the ‘drop method’, in which a drop of a suitable solution is spread on the surface of the emulsion, and left to penetrate into it, and to dry. This method uses the full quantity of the nuclei contained in the drop; however, the penetration into the emulsion is not uniform, so that an average track count must be derived from a survey of the whole area covered by the drop, or of a representative section of this area. In the alternative ‘immersion method’, the plate is left to imbibe the material from a solution in which the plate is totally immersed. Thus, the distribution of the dissolved substance over the emulsion must be uniform at least in the horizontal plane, but the fraction of the solute taken up by the emulsion depends on conditions and must be determined specially by conventional analytical or by radioactive methods. The uptake of uranium by Ilford Concentrated Half-Tone Plates and its dependence on time of immersion, conditions of rinsing after immersion, concentration of uranylion, pH and presence of other salts has been examined1. It seems desirable now to report the results of tests where the concentration was varied more widely, and where besides uranyl ions lead ions were employed. |
| Databáze: | OpenAIRE |
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