Determination of zirconium, molybdenum, hafnium, and tungsten in niobium and tantalum by X-ray fluorescence spectrometry after separation from matrix and preconcentration
A method for the determination of Zr, Mo, Hf, and W in niobium and tantalum is described. This method is based on the removal of the matrix elements by extraction with diantipyrylmethane in dichlorethane from HF medium followed by the collection of the elements to be determined on an anion exchange paper suitable for X-ray fluorescence measurement. The recovery studies were carried out with the radiotracer technique. The recoveries for the individual elements with regard to the whole procedure are between 83.1 +/- 2.3% (Mo) and 93.9 +/- 1.4% (Hf). Limits of detection for all four elements ranged from 0.2 to 0.25 ..mu..g/g. This method was applied to the analysis of samples of different purity grade and the results are compared with those obtained by activation analysis.
- Research Organization:
- Universitaet Ulm, West Germany
- OSTI ID:
- 6923201
- Journal Information:
- Anal. Chem.; (United States), Vol. 54:11
- Country of Publication:
- United States
- Language:
- English
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THE ANION-EXCHANGE SEPARATION OF TITANIUM, ZIRCONIUM, NIOBIUM, TANTALUM, MOLYBDENUM AND TUNGSTEN, WITH PARTICULAR REFERENCE TO THE ANALYSIS OF ALLOYS
QUANTITATIVE DETERMINATION OF TANTALUM, TUNGSTEN, NIOBIUM, AND ZIRCONIUM IN HIGH TEMPERATURE ALLOYS BY X-RAY FLUORESCENT SOLUTION METHOD
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HAFNIUM
FLUORESCENCE SPECTROSCOPY
X-RAY FLUORESCENCE ANALYSIS
MOLYBDENUM
NIOBIUM
SOLVENT EXTRACTION
TANTALUM
TUNGSTEN
ZIRCONIUM
EXPERIMENTAL DATA
QUANTITATIVE CHEMICAL ANALYSIS
CHEMICAL ANALYSIS
DATA
ELEMENTS
EMISSION SPECTROSCOPY
EXTRACTION
INFORMATION
METALS
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
SEPARATION PROCESSES
SPECTROSCOPY
TRANSITION ELEMENTS
X-RAY EMISSION ANALYSIS
400104* - Spectral Procedures- (-1987)
400105 - Separation Procedures