- The process by which a cation in a liquid phase exchanges with another cation present as the counter ion of a negatively charged solid polymer (cation exchanger). A cation-exchange reaction in removal of the Na+ of a sodium chloride solution is RSO3−H+ + Na+ → RSO3−Na+ + H+ (R is the polymer, RSO3− is the cation exchanger); if this is combined with the anion-exchange reaction, NaCl is removed from the solution (desalting). C. may also be used chromatographically, to separate cations, and medicinally, to remove a cation; e.g., H+, from gastric contents, or Na+ and K+ in the intestine. See anion exchange.
Medical dictionary. 2011.
Look at other dictionaries:
cation exchange — noun : ion exchange in which one cation (as sodium or hydrogen) is substituted for one or more other cations (as calcium and magnesium in hard water) called also base exchange … Useful english dictionary
cation exchange — Ion exchange process in which cations in solution are exchanged for other cations from an ion exchanger  … Lexicon of Cave and Karst Terminology
Cation exchange capacity — In soil science, cation exchange capacity (CEC) is the capacity of a soil for ion exchange of positively charged ions between the soil and the soil solution. (A positively charged ion, which has fewer electrons than protons, is known as a… … Wikipedia
Cation-exchange capacities and specific surface areas of clay minerals — ▪ Table Cation exchange capacities and specific surface areas of clay minerals mineral cation exchange capacity at pH 7 (milliequivalents per 100 grams) specific surface area (square metre per gram) kaolinite 3–15 5–40 halloysite (hydrated) 40–50 … Universalium
cation-exchange resin — katijonitinė derva statusas T sritis radioelektronika atitikmenys: angl. cation exchange resin vok. Kationenaustauschharz, n rus. катионообменная смола, f pranc. résine cationique, f … Radioelektronikos terminų žodynas
cation exchange resin — katijonitinė derva statusas T sritis chemija apibrėžtis Sintetinis organinis katijonitas. atitikmenys: angl. cation exchange resin rus. катионообменная смола … Chemijos terminų aiškinamasis žodynas
cation-exchange softening — vandens katijonavimas statusas T sritis chemija apibrėžtis Vandens minkštinimas katijonitais. atitikmenys: angl. cation exchange softening rus. катионирование воды … Chemijos terminų aiškinamasis žodynas
cation exchange resin — an ion exchange resin (q.v.) that exchanges cations; pharmacologic uses include treatment of hyperkalemia and prevention of formation of calcium containing renal calculi … Medical dictionary
cation exchange capacity — ability of the soil to retain cations and thus be fertile … Geography glossary
cation-exchange resins — complex insoluble chemical compounds that may be administered with the diet to alter the electrolyte balance of the body in the treatment of heart, kidney, and metabolic disorders. For example, in patients on a strict low sodium diet such resins… … Medical dictionary