High-frequency a.c. arc as a novel excitation source in atomic emission spectrometry.
In: Spectrochimica Acta, Part B: Atomic Spectroscopy, Jg. 42B (1987) ; Nr. 3, S. 505-512
Zeitschriftenaufsatz / Fach: Chemie
Preliminary measurements have been made to test the quality of a prototype of a new excitation source for at. emission spectrometry, a high-frequency a.c. arc. The tests have been performed by nebulization of solns. contg. metal ions. The optical connection between the emission source and a simultaneous emission spectrometer was achieved by means of an optical quartz fiber. For some elements the sensitivity of the method has been detd. in dependence on the nebulization rate, the distance between the arc and the end of the optical quartz fiber, and the supply voltage. In addn., precision, detection limits, background equiv. concns., and range of linearity of the anal. curves have measured. Compared to inductively coupled plasma-at. emission spectrometric measurements of Ni and Cr contents of some steel samples this high-frequency a.c. arc yielded similar contents as well as relative std. deviations.