Abstract
AbstractExperiments using a commercial atomic absorption spectrophotometer show that accurate routine determinations of calcium and magnesium in extracts of soil in N/2 acetic acid or neutral N ammonium acetate can be made, employing 1600 ppm Sr (as SrCl2.6H2O) as an additive to suppress interferences due to phosphate and other ions. The technique may be applied also to determinations of cation exchange capacity which require measurement of magnesium in solution.
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