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Elimination of phosphate interference in EDTA determinations of calcium and magnesium in plant ash

✍ Scribed by Middleton, K. R.

Book ID
121392666
Publisher
Royal Society of Chemistry
Year
1961
Tongue
English
Weight
562 KB
Volume
86
Category
Article
ISSN
0003-2654

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Limits of interference by iron, manganes
Limits of interference by iron, manganese, aluminium and phosphate in the EDTA determination of calcium in the presence of magnesium using Cal-red as indicator
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## Abstract Under the conditions described the determination of calcium in the presence of an equivalent amount of magnesium, using Cal‐red as indicator, could tolerate up to 2.0 mg. of iron, 1.0 mg. of manganese, 3 mg. of aluminium and up to 6 mg. of phosphate in 50 ml. of solution.