Geophysics · 1973 · 19 citations · 0 references
Natural SciencesChemistryEarth SciencesAnalytical ChemistryElectroanalytical MethodsMineralogyCation Exchange CapacityElectrolyte AnalysisIon ExchangeMineral AnalysisAnalytical Methods For MineralsCation Exchange Capacity AssessmentDialysis MembranesIon Exchange ReactionsIon-exchange CapacityMineralogical AnalysisSample Loss During Collection
Abstract An automated method of determination of the cation exchange capacity of rocks is presented. The principal novel feature is the containment of the sample within a dialysis membrane bag during ion exchange with barium chloride and during washing to remove the excess salt. This procedure prevents sample loss, permits control of the washing step to prevent hydrolysis, and permits automation of these steps. Exchange capacity is determined by an automated conductometric titration of the barium ions with magnesium sulfate solution. The method requires one to ten grams of sample and is reproducible to five percent.