Abstract

The dc arc is considerably more sensitive than the plasma arc in determining rhenium, using the rhenium emission line at 3460.5 Å and cobalt at 3453.5 Å as the internal standard. The plasma arc is twice as precise as the dc arc. The internal standard technique does not increase precision of the plasma arc for rhenium but is useful to indicate proper functioning of the arc aspirator assembly. Use of a 1:1 alcoholethanol solvent for rhenium increases sensitivity of plasma arc determinations by a factor or two. The extracting solvent used to remove rhenium from molybdenite, 4-methyl-1-2-pentanone, is not spectrographically useful in the plasma arc at the wavelengths used for rhenium determination.

Behavior of the dc Iron Arc and Its Usefulness in the Determination of f Values

Ray Hefferlin
J. Opt. Soc. Am. 49(7) 680-685 (1959)

Forty-Five Relative f Values for High Excitation Iron Lines from the dc Arc Spectrum

Ray Hefferlin
J. Opt. Soc. Am. 49(10) 948-949 (1959)

Anode Temperatures and Characteristics of the dc Arc in Noble Gases*†

Bert L. Vallee and Milton R. Baker
J. Opt. Soc. Am. 46(2) 77-82 (1956)

Tomographic measurement of temperature in non-axisymmetric arc plasma by single camera multi-view imaging system

Fan Jiang, Yuanfeng Li, and Shujun Chen
Opt. Express 26(17) 21745-21761 (2018)

Spatially resolved determination of atomic particle densities and line shapes within an arc plasma by tomographic resonance interferometry

Georg Pretzler, Christian Haas, Theo Neger, and Helmut Jäger
Appl. Opt. 36(33) 8806-8814 (1997)