Calculation methods and model experiments for the determination of the parameters of third (Peripheral) mixing chambers using the isotope dilution technique

1972 ◽  
Vol 158 (2) ◽  
pp. 95-122 ◽  
Author(s):  
H. Ludt ◽  
H. D. Herrmann
Keyword(s):  
Isotope Dilution ◽  
Calculation Methods ◽  
Dilution Technique ◽  
Isotope Dilution Technique ◽  
Model Experiments ◽  
Mixing Chambers

THE USE OF ISOTOPE DILUTION IN DETERMINATION OF GEOLOGIC AGE OF MINERALS

1953 ◽  
Vol 31 (10) ◽  
pp. 909-914 ◽  
Author(s):  
R. H. Tomlinson ◽  
A. K. Das Gupta
Keyword(s):  
Ion Exchange ◽  
Mass Spectrometer ◽  
Isotope Dilution ◽  
Chemical Separation ◽  
Mass Spectrometric ◽  
Dilution Technique ◽  
Isotope Dilution Technique ◽  
Mass Spectrometric Determination

The mass spectrometer has been used for the estimation of trace quantities of rubidium and strontium. The isotope dilution technique developed by Aldrich has been extended so that 0.01% of rubidium and 0.0001% strontium have been analyzed with 100 mgm. of mineral. The use of small quantities for mass spectrometric determination allows the use of easily available fission strontium and rubidium. The radioactivity of the fission strontium also simplifies the chemical manipulation. No chemical separation from the mineral was required for the rubidium but the strontium was concentrated by ion exchange methods. Ages are presented for one lepidolite and two biotite minerals and their ages compared to those found by other methods. With one of the biotites the effect of weathering on the fractionation of rubidium from strontium has been studied.

The determination of inorganic sulfate by an isotope dilution technique

1971 ◽  
Vol 34 (1) ◽  
pp. 13-17 ◽  
Author(s):  
A.H. Shackelford ◽  
V. Frattali ◽  
Robert Van Reen
Keyword(s):  
Isotope Dilution ◽  
Dilution Technique ◽  
Isotope Dilution Technique ◽  
Inorganic Sulfate

DETERMINATION OF DICOUMAROL IN SPOILED SWEETCLOVER

1970 ◽  
Vol 50 (1) ◽  
pp. 39-45 ◽  
Author(s):  
A. E. EMERY ◽  
J. R. GEAR
Keyword(s):  
Quantitative Determination ◽  
Isotope Dilution ◽  
Colorimetric Method ◽  
Dilution Technique ◽  
Isotope Dilution Technique ◽  
Melilotus Alba ◽  
Qualitative Determination

A procedure has been devised for the isolation of dicoumarol from spoiled sweetclover (Melilotus alba). Using this procedure a method has been developed for the quantitative determination of dicoumarol in sweetclover, which involves an isotope dilution technique, and utilizes methylene-14C-dicoumarol. A colorimetric method for dicoumarol measurement has also been studied, which although not quantitatively reliable, provides a rapid qualitative determination of whether or not spoilage has rendered sweetclover hay unsafe for use as fodder. The results of analyses of a variety of forage samples are reported and discussed.

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