RAPID COLORIMETRIC DETERMINATION OF POTASSIUM IN PLANT TISSUES

Abstract
The colorimetric procedure of Jacobs and Hoffman for determining K precipitated as the cobaltinitrite affords a rapid and convenient method for samples of plant tissue. The method compares favorably with the chloroplatinate method with respect to precision; and the saving of time and labor, permitting the handling of a larger number of replicates, results in a much greater final precision.

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