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Note on the loss of phosphoric acid during fusion with ammonium fluoride

Published online by Cambridge University Press:  27 March 2009

William A. Davis  and
James Arthur Prescott
William A. Davis
Affiliation:
(Rothamsted Experimental Station.)
James Arthur Prescott
Affiliation:
(Rothamsted Experimental Station.)
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Extract

1. When salts or minerals containing phosphoric acid are ignited with ammonium fluoride as in the ordinary process of analysis of silicates, considerable loss of the phosphoric acid may occur. It is probable that the phosphorus is volatilised in the form of a phosphorus fluoride.

2. The loss is least in the case of salts containing an alkali metal. It is less in the case of disodium hydrogen phosphate than in that of potassium dihydrogen phosphate, and is greatest in the case of phosphates of the alkali earth metals, such as calcium phosphate or apatite.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 8 , Issue 1 , September 1916 , pp. 136 - 138
Copyright
Copyright © Cambridge University Press 1916

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References

Page 137 note 1 This Journal, 1914, 6, 111.Google ScholarPubMed