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THE SEMIDIRECT DETERMINATION OF POTASSIUM OXIDE IN FELDSPARS *
Author(s) -
Koenig E. W.
Publication year - 1939
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1939.tb19443.x
Subject(s) - potassium , chemistry , oxide , decomposition , salt (chemistry) , inorganic chemistry , mineralogy , analytical chemistry (journal) , chromatography , organic chemistry
A bstract A method for the evaluation of potassium oxide in feldspars, without the necessity of first removing the constituents which usually interfere with this determination, is described. The procedure is based upon a decomposition with HF‐HClO 4 , followed by the separation of potassium as the double salt ((K, Na) 3 Co(NO 2 ) 6 · x H 2 O), with a final conversion to KClO 4 in the usual manner. Analytical data are given to indicate the relative precision and accuracy of the method compared with procedures in use at the present time. The application of the proposed method to the analyses of other silicates is mentioned briefly.