Studies on the Flame Spectrochemical Analysis. VIII : On the Self Interference and Mutual Interference of Alkali Elements

概要

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The self interference and mutual interferences of alkali elements in their flame spectrochemical determination were studied using Beckman model DU spectrophotometer and its type 9200 flame attachment. Two kinds of self interferences were found in the flame spectra of alkali elements ; one was due to the self absorption of the spectral line and the other was due to the ionization of the excited atoms. The self absorption of the spectral line was intensest in sodium and lithium and less intense in potassium, and the ionization of the excited atoms could be observed in the spectra of cesium, rubidium and potassium. The changes of calibration curve of the element caused by these interferences were also discussed. The interaction of alkali element in flame spectra can be classified by the ionization potentials of the elements and the result can be summarized as follows ; the element which has higher ionization potential is intensified its spectral emission in the presence of other element having lower potential, and the spectral emission of the partially ionized element in the flame is extremely intensified by the presence of foreign ionized elements.
東北大学の論文