THE DETERMINATION OF TUNGSTEN AS AN IMPURITY IN ZIRCONIUM AND ZIRCALOY
The addition of stannous chloride and potassium thiocyanate to an acid tungstate solution results in a colored tungsten thiocyanate complex which exhibits a maximum absorbance at 400 mu. The method covers the determination of tungsten in the range from 25 to 400 ppm on a half-grain sample basis. The effects of impurities and alloying additives in zirconium and Zircaloy are compensated by the use of a blank consisting of a sample in which the thiocyanate color is not developed. Without a blank of this type chromium and nickel interfere to the extent that they are colored in solution. More than 0.l0 mg of copper present in the sample taken for analysis results in a precipitate of cuprous thiocyanate. Filtration prior to color measurement eliminates this interference. (auth)
- Research Organization:
- Westinghouse Electric Corp. Bettis Plant, Pittsburgh
- NSA Number:
- NSA-13-000559
- OSTI ID:
- 4303532
- Report Number(s):
- WAPD-CTA(GLA)-180(Rev. 1)
- Country of Publication:
- United States
- Language:
- English
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