The influence of ethanol addition on the spatial emission distribution of traces in a vertical argon stabilized DC arc plasma

Abstract

The plasma of a vertical argon stabilized DC arc at atmospheric pressure is applied as a spectrochemical source. The lateral distributions of relative spectral line intensities of some trace elements (Zn, Pt, Cd, Mg, Ca and Al) introduced into the plasma in the form of aqueous and ethanol–aqueous solutions were experimentally determined. These distributions were correlated with the calculated equilibrium plasma composition of the arc plasma. On the basis of the obtained results, an explanation of the influence of ethanol addition on the radiation densities from an arc plasma is given.

Plazma argonom stabilizovanog vertikalnog jednosmernog luka na atmosferskom pritisku korišćena je kao spektrohemijski izvor. Eksperimentalno su određene lateralne raspodele intenziteta emisije nekoliko elemenata prisutnih u tragu (Zn, Pt,Cd, Mg,Ca i Al) u vodenim i etanol–vodenim rastvorima. Ove raspodele su dovedene u vezu sa izračunatim ravnotežnim sastavom lučne plazme i objavšnjen je uticaj etanola na gustinu zračenja iz lučne plazme.