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Effect of External Magnetic Field on the Volatilization of Elements in the dc Arc

Volume 32, Number 3 (June 1978) Page 272-275

Fakhry, A.A.; Eid, M.A.; Hashem, M.S.


In the present investigation opposing magnetic fields are applied to the free burning carbon arc with a silicate sample (granodiorite) in its anode crater. The magnetic field promoted the selective volatilization of the elements present in the sample. As a result, a depression in the spectral line intensities of Mn, Ti, Th, and Fe as well as the background was observed. At the same time the intensity of the spectral lines of Ag, Ge, Pb, In, and Cu is enhanced. The latter elements are of great significance since they are used as pathfinders for gold.