FERTILIZER CHARACTERIZATION: Determination of Surface Area of Dicalcium Phosphate by Isotope Exchange

1956 ◽  
Vol 4 (5) ◽  
pp. 436-438 ◽  
Author(s):  
J. H. CARO ◽  
W. L. HILL
Keyword(s):  
Surface Area ◽  
Isotope Exchange ◽  
Dicalcium Phosphate

Determination of trace amounts of cobalt by homogeneous isotope exchange in an organic phase

1980 ◽  
Vol 45 (12) ◽  
pp. 3332-3337
Author(s):  
Václav Jiránek
Keyword(s):  
Organic Phase ◽  
Isotope Exchange ◽  
Radiochemical Method

A new radiochemical method for determining trace amounts of cobalt has been worked out. It is based on a homogeneous isotope exchange between cobalt(III) diethyldithiocarbamate and cobalt(III) caprate in an organic phase. The method, tested in the range 0.005-8 μg Co, has proved to be selective.

Statistical Description of Isotope Exchange Processes: A Multisite Model for the 18O Exchange

1982 ◽  
Vol 37 (11-12) ◽  
pp. 1161-1169 ◽  
Author(s):  
Paul Rösch
Keyword(s):  
Active Site ◽  
Isotope Exchange ◽  
Analytical Procedure ◽  
Matrix Formalism ◽  
Model Calculations ◽  
Exchange Processes ◽  
Reaction Solution ◽  
Different Types ◽  
Refinement Procedure

Abstract An analytical procedure has been developed for the determination of isotope exchange processes as exemplified by the 18O exchange catalysed by enzyme-nucleotide complexes. The model is able to handle more than one type of active site per reaction solution and is also able to distinguish between different types of inequivalence of the oxygens of enzyme bound Pi. Use of transition matrix formalism and basic statistical considerations lead directly to the simple model. A data refinement procedure is introduced and model calculations are shown.

Sign in / Sign up

Export Citation Format

Share Document