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Routine determination of calcium and magnesium in soil extracts by atomic absorption spectrophotometry
Author(s) -
MacPhee W. S. G.,
Ball D. F.
Publication year - 1967
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740180812
Subject(s) - magnesium , atomic absorption spectroscopy , chemistry , calcium , ammonium acetate , spectrophotometry , absorption (acoustics) , inorganic chemistry , magnesium acetate , ammonium , acetic acid , ion exchange resin , nuclear chemistry , chromatography , materials science , biochemistry , organic chemistry , physics , high performance liquid chromatography , quantum mechanics , composite material
Experiments 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 SrCl 2 .6H 2 O) 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.