超音波エーロゾル発生装置と直流アークを用いる溶液試料の発光分光分析

概要

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An ultrasonically nebulized and desolvated aerosol is introduced into a horizontal, 5-A dcarc by argon carrier gas. A simple quartz chamber is employed to control the atmosphere of the arc. In the presence of more than 1 mg/m<I>l</I> of sodium or potassium in the solution, the bright core of the arc disappears and a flame-like, low-luminous arc column (low-temperature arc) is obtained. An addition of 1 mg/m<I>l</I> of sodium to the sample increases the sensitivity for many elements and suppresses the effect of other matrix elements. This low-temperature arc is suitable for the detection of the elements whose excitation energies are below 5 eV, whereas in the absence of alkali elements, most elements are excited. The detection limits measured for 10 elements in the presence of sodium are comparable with, or lower than, those obtained with the most sensitive flame photometric method.
社団法人日本分光学会の論文