Simple spectrophotometric method for determination of zirconium or hafnium in selected molybdenum-base alloys.
A simple analytical procedure is described for determining zirconium or hafnium in molybdenum-base alloys by formation of the Arsenazo III complex of zirconium or hafnium in 9 M hydrochloric acid medium. The absorbance is measured at 670 nm. Molybdenum (10 mg), titanium (1 mg), and rhenium (10 mg) have no adverse effect. No prior separation is needed. The relative standard deviation is 1.3-2.7%.
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National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio 44135, U.S.A.