The rapid determination of tungsten in ores by X-ray fluorescence analysis

The Analyst ◽  
1968 ◽  
Vol 93 (1108) ◽  
pp. 441 ◽  
Author(s):  
K. G. Carr-Brion ◽  
K. W. Payne
Keyword(s):  
Rapid Determination ◽  
Fluorescence Analysis ◽  
X Ray

Sorption of Se (IV) from aqueous solutions with subsequent determination by X-ray fluorescence analysis

2020 ◽  
Vol 86 (10) ◽  
pp. 5-9
Author(s):  
D. G. Filatova ◽  
A. A. Arkhipenko ◽  
M. A. Statkus ◽  
V. V. Es’kina ◽  
V. B. Baranovskaya ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Fluorescence Analysis ◽  
Standard Samples ◽  
Phase Contact Time ◽  
Sorbent Phase ◽  
X Ray ◽  
Fundamental Parameters ◽  
Inductively Coupled ◽  
Subsequent Determination

An approach to sorptive separation of Se (IV) from solutions on a novel S,N-containing sorbent with subsequent determination of the analyte in the sorbent phase by micro-x-ray fluorescence method is presented. The sorbent copolymethylenesulfide-N-alkyl-methylenamine (CMA) was synthesized using «snake in the cage» procedure and proven to be stable in acid solutions. Conditions for quantitative extraction of Se (IV) were determined: sorption in 5 M HCl or 0.05 M HNO3 solutions when heated to 60°C, phase contact time being 1 h. The residual selenium content in the solution was determined by inductively coupled plasma mass spectrometry (ICP-MS) using 82Se isotope. The absence of selenium losses is proved and the mechanism of sorption interaction under specified conditions is proposed. The method of micro-x-ray fluorescence analysis (micro-RFA) with mapping revealed a uniform distribution of selenium on the sorbent surface. The possibility of determining selenium in the sorbent phase by micro-RFA is shown. When comparing the obtained results with the results of calculations by the method of fundamental parameters, it is shown the necessity of using standard samples of sorbates to obtain correct results of RFA determination of selenium in the sorbent phase.

scholarly journals Rapid determination of hydrogen positions and protonation states of diisopropyl fluorophosphatase by joint neutron and X-ray diffraction refinement

2009 ◽  
Vol 106 (3) ◽  
pp. 713-718 ◽  
Author(s):  
Marc-Michael Blum ◽  
Marat Mustyakimov ◽  
Heinz Rüterjans ◽  
Kai Kehe ◽  
Benno P. Schoenborn ◽  
...  
Keyword(s):  
Rapid Determination ◽  
X Ray Diffraction ◽  
X Ray

Determination of the composition of binary chalcogenide glasses by X-ray fluorescence analysis

2010 ◽  
Vol 44 (1) ◽  
pp. 24-27 ◽  
Author(s):  
G. A. Bordovsky ◽  
A. V. Marchenko ◽  
P. P. Seregin ◽  
N. N. Smirnova ◽  
E. I. Terukov
Keyword(s):  
Chalcogenide Glasses ◽  
Fluorescence Analysis ◽  
X Ray
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