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Fertilizer Materials Analysis, Determination of Calcium in Phosphate Materials by Titration with EDTA in the Presence of Calcein Indicator

✍ Scribed by Graham, H. G.; McRight, T. C.; Frederick, E. D.

Book ID
127396152
Publisher
American Chemical Society
Year
1962
Tongue
English
Weight
512 KB
Volume
10
Category
Article
ISSN
0021-8561

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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.