Calcium-lead cation exchange, selectivity

The Composition of Montmorillonites in Atomic Percent and the Selectivity Coefficient of Calcium-Lead Cation Exchange... [Pg.152]

Sugar analysis by hplc has advanced greatly as a result of the development of columns specifically designed for carbohydrate separation. These columns fall into several categories. (/) Aminopropyl-bonded siHca used in reverse-phase mode with acetonitrile—water as the eluent. (2) Ion-moderated cation-exchange resins using water as the eluent. Efficiency of these columns is enhanced at elevated temperature, ca 80—90°C. Calcium is the usual counterion for carbohydrate analysis, but lead, silver, hydrogen, sodium, and potassium are used to confer specific selectivities for mono-, di-, and... [Pg.10]

A divalent cation ion exchange electrode that responds to several cations is available. Its response is nearly equal for calcium and magnesium, and it.is useful for measuring water hardness. A copper and a lead electrode are also available. Anion-selective electrodes of this, type are available for nitrate, perchlorate, and chloride. They are the same in principle, except that a liquid anion exchanger is used instead of a cation exchanger. [Pg.397]

Big Chemical Encyclopedia