Emission Spectrographic Analysis of Metal Solid Samples with Plasma Jet Flame. I. : Application of Nitrogen Plasma Flame

Abstract

A small plasma jet burner for direct excitation of metal solid samples was developed. The optimum operating conditions are as follows; d.c. arc current about 15 A, flow rate of nitrogen tangentially introduced gas about 1.5–2 l/min, and that of atomizer gas about 3.5–4 l/min. The limit of detection of some elements were determined with solution samples. Satisfactory-calibration curves were also obtained for analyses of alloying elements in some solid form alloys.