RAPID SEMIMICROMETHOD FOR CATION-EXCHANGE CAPACITIES OF CLAYS AND SOILS WITH THE FLAME PHOTOMETER

Abstract

A method of estimating the cation-exchange capacities of small samples of clays and soils with the flame photometer is described. As only 0.1 g. of sample is required, exchange capacities of clays from low clay content soils can be detd. without prior time-consuming sedimentations from large quantities of soil. The method is simple and rapid, the detn. of 24 samples being accomplished in less than 5 hrs. Good agreement between this and other methods has been obtained. It has already been used extensively by the writers.