Sorption-luminescence method for determination of ytterbium
Închide
Articolul precedent
Articolul urmator
246 4
Ultima descărcare din IBN:
2023-10-01 19:37
Căutarea după subiecte
similare conform CZU
542.81:546.668 (1)
Procese fizice, fiziochimice și electrice (3)
Chimie anorganică (444)
SM ISO690:2012
STASHKIV, Olha, VASYLECHKO, Volodymyr, GAMERNYK, Roman. Sorption-luminescence method for determination of ytterbium. In: Ecological and environmental chemistry : - 2022, Ed. 7, 3-4 martie 2022, Chișinău. Chisinau: Centrul Editorial-Poligrafic al USM, 2022, Ediția 7, Vol.1, p. 46. ISBN 978-9975-159-07-4.. 10.19261/eec.2022.v1
EXPORT metadate:
Google Scholar
Crossref
CERIF

DataCite
Dublin Core
Ecological and environmental chemistry
Ediția 7, Vol.1, 2022
Conferința "Ecological and environmental chemistry 2022"
7, Chișinău, Moldova, 3-4 martie 2022

Sorption-luminescence method for determination of ytterbium

CZU: 542.81:546.668

Pag. 46-46

Stashkiv Olha1, Vasylechko Volodymyr23, Gamernyk Roman3
 
1 Andrei Krupynskyi Lviv Medical Academy,
2 Lviv University of Trade and Economic,
3 Ivan Franko National University of Lviv
 
Disponibil în IBN: 2 martie 2022


Rezumat

Yb(III) ions, complexed with some organic ligands, exhibit intense luminescence. The light energy is absorbed by the organic part of the molecule of the complex, then there is an intramolecular energy transfer from the organic ligand to the Yb(III) ion. During the sorption of Yb(III) on the solid matrix, the intermolecular energy transfer is suppressed, which provides the increase of the luminescence intensity, and the effect of selective preconcentration is achieved. Promising materials for solid-phase spectrofluorimetry are natural zeolites. Sorbed Yb(III) on these natural nanomaterials retains the ability to interact with organic ligands. In order to develop a sorption-luminescent method for the determination of Yb, the ability to luminescence of Yb(III) ions sorbed on natural Transcarpathian clinoptilolite in combination with 1-(2-pyridylazo)-2-naphthol (PAN) was studied. Luminescence composition «clinoptilolite-Yb(III)-PAN» is observed in the IR region of the spectrum with a maximum λ=978 nm. Luminophore samples were excited by a laser with λ=532 nm. The optimal conditions for obtaining this luminophor have been found. To prepare an effective luminophor «clinoptilolite-Yb(III)-PAN» it is necessary to use precalcined at 300 оC samples of clinoplololite, heated at 50 оC samples «clinoptilolite-Yb(III)», and the final luminophor heated at 50 оC. Sorption of Yb(III) on clinoptilolite is carried out from weakly alkaline solutions at pH 9.0. The developed sorption-luminescent method allows to determine Yb in the presence of 10-fold excess of La(III) and Eu(III), as well as 5-fold excess of Lu(III), Tm(III), Gd(III), Pr(III), Tb(III) with a detection limit of 5.0 ng·mL-1. The method is tested on model solutions and intermetallics. The method provides a high enrichment factor, a wide concentration range of Yb determination (12.5-1000 ng·mL-1).