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Flame‐photometric determination of calcium and magnesium in vegetables
Author(s) -
Haworth F.,
Cleaver T. J.
Publication year - 1961
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.2740121207
Subject(s) - magnesium , calcium , photometer , chemistry , aluminium , phosphate , ion , environmental chemistry , analytical chemistry (journal) , biochemistry , optics , physics , organic chemistry
Many difficulties have been reported in the estimation of calcium and magnesium in plant materials using flame‐photometric methods, the reliability of which has been questioned. In the method described here the effects of interfering ions have been reduced to negligible proportions by using dilute solutions of plant ash, in presence of an excess of sulphate ions, in a flame photometer of high sensitivity. the method gives accurate and reproducible results for a wide range of vegetable tissues, but it has certain limitations at low calcium concentrations, especially in presence of large amounts of phosphate and aluminium.