A method has been developed for the analysis of hafnium metal for aluminum, copper, iron, titanium, and tungsten in the ppm range and zirconium in the 1 0–4.0% range. Solid machined pieces 1 × 1 in. or larger are used. Spectra are excited with a low voltage ignited ac arc with low inductance and capacitance. Hafnium serves as the internal standard The method offers an increase in speed and improved precision over the carrier distillation technique which has been commonly used
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References
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Military Specification, Hafnium Plate, Flat Bar, Sheet, and Strip, MIL-H-21031A (SHIPS) Amendment 1, Bureau of Ships, U. S. Navy, April 1959
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FrainJ. F.RyanJ. R., and JacobsR. M., The Determination of Impurities in Hafnium by Emission Spectrographic Analysis, Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, 1959.
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HarrisonG. R., M.I.T. Wavelength Tables, John Wiley & Sons, New York, 1956.
