Spectrographic determination of impurities in metallic titanium and research grade titanium dioxide

1974 ◽  
Vol 21 (2) ◽  
pp. 995-998 ◽  
Author(s):  
O. P. Turulina ◽  
N. F. Zakhariya
Keyword(s):  
Titanium Dioxide ◽  
Metallic Titanium ◽  
Spectrographic Determination ◽  
Research Grade ◽  
Determination Of Impurities

Spectrographic Determination of Impurities in Molybdenum: Influence of a Diatomic Gaseous Reaction Product on the Arc Excitation in Argon

1971 ◽  
Vol 25 (3) ◽  
pp. 305-312 ◽  
Author(s):  
W. F. Morris ◽  
E. F. Worden
Keyword(s):  
High Sensitivity ◽  
Time Resolved ◽  
Gaseous Reaction ◽  
Spectrographic Determination ◽  
Refractory Elements ◽  
Spectrographic Method ◽  
Anode Temperature ◽  
Determination Of Impurities ◽  
Arc Excitation

A spectrographic method has been developed for the determination of 24 trace elements in MoO3. The method is particularly effective for the refractory elements Nb, Ta, Zr, Ti, and V, which are difficult to determine by conventional spectrographic procedures. High sensitivity is achieved in a low amperage arc in argon as a consequence of certain thermochemical reactions which occur in the anode during the arcing process. Although it would appear that the discharge takes place in argon, in fact a small quantity of CO is evolved into the are when MoO3 is reduced in the anode. The evolution of CO changes the composition of the are gas and is essential to the ultimate vaporization and excitation of metal impurities. This paper presents time-resolved spectra, anode temperature, and arc gap voltage measurements which demonstrate the effect of CO.

A Direct Carrier Distillation Procedure for the spectrographic Determination of Impurities in Uranium Tetrafluoride

1974 ◽  
Vol 28 (6) ◽  
pp. 564-568 ◽  
Author(s):  
L. S. Dale
Keyword(s):  
Simultaneous Determination ◽  
Spectral Interference ◽  
Lead Chloride ◽  
Internal Standards ◽  
Spectrographic Determination ◽  
Uranium Tetrafluoride ◽  
Coefficients Of Variation ◽  
Wide Range ◽  
Determination Of Impurities

A direct carrier distillation procedure for the determination of a wide range of impurities in uranium tetrafluoride is described. The method is based on the use of lead chloride as carrier with yttrium oxide to suppress uranium spectral interference. A deep crater electrode further aids in the reduction of spectral interference. Germanium and cobalt are used as internal standards. The method has been adopted for the simultaneous determination of Ag, l, B, Cd, Cr, Cu, Fe, Mg, Mn, Mo, Na, Ni, Si, Sn, Ti, V, and Zn with detection limits in the range 0.1 to 20 ppm and coefficients of variation ranging from 4 to 15%.

Spectrographic Determination of Impurities in Gallium Chloride Solutions

1951 ◽  
Vol 23 (10) ◽  
pp. 1503-1505 ◽  
Author(s):  
William Saltman ◽  
Norman Nachtrieb
Keyword(s):  
Spectrographic Determination ◽  
Chloride Solutions ◽  
Gallium Chloride ◽  
Determination Of Impurities
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