The use of correlations to improve the precision and accuracy of emission spectral analysis

A method using correlation between intensities of spectral lines for increasing the precision and accuracy in emission spectral analysis is described.

Correlations in spectra of low and high voltage spark discharges, and a.c. and d.c. arcs are investigated.

Firstly, conditions were determined, under which correlation relationships between the analytical signal and the parameters following variations in the excitation and mass transfer processes are rectilinear, strong (correlation coefficients r 0.8), and stable in time and under which the regression coefficients do not depend on the investigated element concentration.

A quantitative spectral analysis method, in which either one “fixation pair”, controlling mass transfer changes in the radiation source, or two fixation pairs, following variations in the excitation and mass transfer conditions, are registered simultaneously with the analytical signal, was elaborated. Applications of the method in arc analysis of soils and ores and spark analysis of steels illustrate the improvement of both analytical precision and accuracy.     

Investigation of correlations in the spectrum of a spark discharge

Journal of Applied Spectroscopy -     

Depleted uranium hexafluoride—The fluorine source for production of the inorganic and organic compounds

The methods of the transfer of depleted uranium hexafluoride into the safer chemical forms have been analyzed. The depleted uranium hexafluoride is the very valuable source of the high-purity fluorine that it may be used for the production of the pure fluorine-containing compounds. The need for processing of hydrogen fluoride obtained as a result of depleted uranium hexafluoride (DUF₆) conversion, as a result of its high chemical and toxicological hazard. The methods and ways of fluorine application in different fields of science and technology are contained in DUF₆. Basic direction of fluorine application, contained in DUF₆, is nuclear fuel cycle.