Calculation of precision in isotope dilution experiments.
Abstract Equations are derived for the composite error of isotope dilution measurements in three types of experiment viz. simple dilution, saturation analysis (sub-stoichiometric dilution) and adsorbed ion measurement; the latter two yielding equations of the same form. Errors for each type are derived in terms of radiometric errors, chemical errors and a factor related to the extent of isotope dilution. In general, dilution is the most critical factor which controls error; chemical errors are usually less important than radiometric errors. A nomogram for calculating dilution errors is given.
The influence of the statistical error in radioactivity counting on the precision of isotope dilution analysis, II
Three types of direct isotope dilution analysis (IDA) are mathematically treated: substoichiometric dilution analysis, the determination of sorbent capacity, and direct IDA with a constant amount of substance lost in the separation step. Tables and graphs are given for an easy determination of the amount of radioisotopeW0 to be added and for the estimated error involved.
The isotope dilution procedure of analysis. I. Historical and literature survey.
The isotope dilution procedure of analysis, a relatively new technique, offers intriguing possibilities and is of sufficient importance to warrant special attention at this time. The history of the procedure and a survey of the literature are presented.