Call number:
ZSP-202-283
In:
Research report
Description / Table of Contents:
CONTENTS: Introduction. - Determination of CEC of earth materials using isotopic exchange. - Determination of CEC of earth materials using isotopic labeling. - Appendix: Procedure for determination of CEC of earth materials by isotopic labeling.
Description / Table of Contents:
Two radiochemical methods were investigated for determining the cation exchange capacity of earth materials having a wide range in physicochemical properties. The first method attempted was unsuccessful but involved determination of the radioactivity of a 22Na-NaOAc solution in isotopic equilibrium with a Na+-saturated mineral phase. The logic of this method is presented in order to illustrate principles of isotopic exchange in mineral systems. The method finally adopted is based upon determination of the radioactivity of a salt-free, Na+-saturated mineral sample prepared using a radioactive NaOAc solution with a known 22Na-NaOAc composition. This method is less time-consuming and more accurate than the conventional ammonium acetate method for cation exchange capacity determinations.
Type of Medium:
Series available for loan
Pages:
iii, 12 Seiten
,
Illustrationen
Series Statement:
Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 283
URL:
http://www.worldcat.org/oclc/5975372
Language:
English
Branch Library:
AWI Library
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