Solid-phase colorimetric determination of potassium

Autor:	Roger L Fleming, S C Charlton, A Zipp
Rok vydání:	1982
Předmět:	Aqueous solution Chemistry Sodium Potassium Biochemistry (medical) Clinical Biochemistry Inorganic chemistry Ionophore Plasticizer chemistry.chemical_element Valinomycin chemistry.chemical_compound Polyvinyl chloride Anion binding
Zdroj:	Clinical Chemistry. 28:1857-1861
ISSN:	1530-8561 0009-9147
DOI:	10.1093/clinchem/28.9.1857
Popis:	A nonpolar organic film (plasticized polyvinyl chloride) containing the ionophore valinomycin was incubated with an aqueous solution containing potassium ion and a detectable anion (erythrosin B). The amount of erythrosin B retained by the film after washing could be measured by absorbance or reflectance, and was directly related to the potassium concentration. This dye-binding method is quantitative for potassium and is suitable for both aqueous and serum-based solutions. There was no interference by sodium in the range found in serum. Several polyvinyl chloride plasticizers and anionic dyes and some other ionophores were found to be useful. The anion binding is thought to be restricted to the surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f7212c9ff6c37a01cd678264264b6e28 https://doi.org/10.1093/clinchem/28.9.1857 Zobrazit plný text záznamu