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Title: Determination of zirconium, molybdenum, hafnium, and tungsten in niobium and tantalum by X-ray fluorescence spectrometry after separation from matrix and preconcentration

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Universitaet Ulm, West Germany
OSTI Identifier:
6923201
Resource Type:
Journal Article
Journal Name:
Anal. Chem.; (United States)
Additional Journal Information:
Journal Volume: 54:11
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, 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

Citation Formats

Knote, H, and Krivan, V. Determination of zirconium, molybdenum, hafnium, and tungsten in niobium and tantalum by X-ray fluorescence spectrometry after separation from matrix and preconcentration. United States: N. p., 1982. Web. doi:10.1021/ac00248a046.
Knote, H, & Krivan, V. Determination of zirconium, molybdenum, hafnium, and tungsten in niobium and tantalum by X-ray fluorescence spectrometry after separation from matrix and preconcentration. United States. https://doi.org/10.1021/ac00248a046
Knote, H, and Krivan, V. 1982. "Determination of zirconium, molybdenum, hafnium, and tungsten in niobium and tantalum by X-ray fluorescence spectrometry after separation from matrix and preconcentration". United States. https://doi.org/10.1021/ac00248a046.
@article{osti_6923201,
title = {Determination of zirconium, molybdenum, hafnium, and tungsten in niobium and tantalum by X-ray fluorescence spectrometry after separation from matrix and preconcentration},
author = {Knote, H and Krivan, V},
abstractNote = {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.},
doi = {10.1021/ac00248a046},
url = {https://www.osti.gov/biblio/6923201}, journal = {Anal. Chem.; (United States)},
number = ,
volume = 54:11,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 1982},
month = {Wed Sep 01 00:00:00 EDT 1982}
}