A green analytical method for the determination of Cu, Fe, Mn, and Zn in wheat flour using total reflection X-ray fluorescence

2018 ◽  
Vol 33 (7) ◽  
pp. 1264-1268 ◽  
Author(s):  
Ignacio Machado ◽  
Sebastián Mondutey ◽  
Natalia Pastorino ◽  
Valeria Arce ◽  
Mariela Pistón
Keyword(s):  
Sample Preparation ◽  
Wheat Flour ◽  
Analytical Method ◽  
Environmentally Friendly ◽  
Total Reflection ◽  
X Ray ◽  
Subsequent Determination ◽  
Environmentally Friendly Method

A simple, fast and environmentally friendly method for sample preparation and subsequent determination of minerals in wheat flour using TXRF.

Sorption of As (III) and Se (IV) from aqueous solutions for subsequent determination by total reflection X-ray fluorescence

2021 ◽  
Vol 87 (8) ◽  
pp. 19-22
Author(s):  
D. G. Filatova ◽  
A. A. Arkhipenko ◽  
M. A. Statkus ◽  
I. V. Mikheev ◽  
V. B. Baranovskaya ◽  
...  
Keyword(s):  
Raw Materials ◽  
Total Reflection ◽  
Phase Contact Time ◽  
Sorbent Phase ◽  
X Ray ◽  
Icp Ms ◽  
Subsequent Determination ◽  
Processed Products ◽  
Branched Structure

An approach to the simultaneous isolation of As (III) and Se (IV) from solutions on a new S,N-containing sorbent followed by determination of the analyte in the sorbent phase using total reflection X-ray fluorescence (TXRF) has been proposed. To match the goal, a sorbent with a branched structure was synthesized on the base of polyacrylamide modified with formaldehyde and hydrogen sulfide. This is a heteroatomic copolymer containing sulfide bridges in the chain and crosslinking by a tertiary amine. Conditions for the quantitative co-extraction of As (III) and Se (IV), i.e., sorption in solutions of 1 M HNO3 with calcium ions present, heating to 60°C and phase contact time of 1 h were determined. The mechanism of sorption interaction of the analytes under specified conditions is discussed. It is shown that a 100-fold excess of iron, zinc and copper does not interfere with the extraction of analytes, thus providing the possibility of As (III) and Se (IV) isolation from different types of raw materials and processed products using the synthesized sorbent. A method for the direct XRF quantification of arsenic and selenium with sr 0.09 and 0.08, respectively, in the sorbent phase has been developed. The correctness of the results was confirmed by the ICP-MS method in analysis of aqueous reference solution after dissolution of the sorbate in HNO3 (1:1).

A direct and safe method for plutonium determination using total reflection X-ray fluorescence spectrometry

2019 ◽  
Vol 34 (2) ◽  
pp. 366-374 ◽  
Author(s):  
Sangita Dhara ◽  
Kaushik Sanyal ◽  
Sumana Paul ◽  
N. L. Misra
Keyword(s):  
Analytical Method ◽  
Total Reflection ◽  
Fluorescence Spectrometry ◽  
Safe Method ◽  
X Ray ◽  
First Time

A direct, simple and safe micro-analytical method for the determination of plutonium (Pu) using Total Reflection X-ray Fluorescence (TXRF) spectrometry is reported for the first time.

Determination of some heavy metals (Fe, Cu, Zn and Pb) in blood by total reflection X-ray fluorescence

2003 ◽  
Vol 107 ◽  
pp. 203-206 ◽  
Author(s):  
M. Bounakhla ◽  
A. Doukkali ◽  
K. Lalaoui ◽  
H. Aguenaou ◽  
N. Mokhtar ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Total Reflection ◽  
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.

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