Air entrainment in an inductively coupled plasma measured by Raman and Rayleigh scattering

J.M. Regt, de, F.P.J. de Groote, J.J.A.M. Mullen, van der, D.C. Schram

Research output: Contribution to journalArticleAcademicpeer-review

10 Citations (Scopus)

Abstract

A new technique to study the entrainment of air into the inductively coupled argon plasma is presented. The combination of vibrational Raman scattering and Rayleigh scattering enables measuring absolute particle densities of air and argon. The measurements show the entrainment of air into the plasma. At an axial position of 2 mm above the end of the quartz torch it is found that at 90% of the plasma radius 55% of the particles originate from air and by exponential extrapolation towards 70% of the radius about 1% entrainment of air is predicted to be present. Furthermore, a comparison with a cold argon flow shows that due to the higher viscosity the entrainment in the plasma is lower than in the cold argon flow.
Original languageEnglish
Pages (from-to)1527-1534
JournalSpectrochimica Acta. Part B : Atomic Spectroscopy
Volume51
Issue number12
DOIs
Publication statusPublished - 1996

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