A STRAIGHTFORWARD METHOD FOR DETERMINATION OF Ba AND Sr TOTAL CONTENT IN NATURAL ZEOLITES BASED ON MICROWAVE-ASSISTED DIGESTION AND INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY

Marin SENILA; Oana CADAR; Lacrimioara SENILA; Anca BECZE; Marius ROMAN; Bogdan ANGYUS; Gabriel BRUJ

doi:10.24193/subbchem.2021.2.09

A STRAIGHTFORWARD METHOD FOR DETERMINATION OF Ba AND Sr TOTAL CONTENT IN NATURAL ZEOLITES BASED ON MICROWAVE-ASSISTED DIGESTION AND INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY

Authors

Marin SENILA INCDO-INOE2000, Research Institute for Analytical Instrumentation, 67 Donath str., RO-400293, Cluj-Napoca, Romania. *Corresponding author: marin.senila@icia.ro https://orcid.org/0000-0001-6738-6356
Oana CADAR INCDO-INOE2000, Research Institute for Analytical Instrumentation, 67 Donath str., RO-400293, Cluj-Napoca, Romania. https://orcid.org/0000-0002-0879-9211
Lacrimioara SENILA INCDO-INOE2000, Research Institute for Analytical Instrumentation, 67 Donath str., RO-400293, Cluj-Napoca, Romania. https://orcid.org/0000-0002-5791-0449
Anca BECZE INCDO-INOE2000, Research Institute for Analytical Instrumentation, 67 Donath str., RO-400293, Cluj-Napoca, Romania. https://orcid.org/0000-0003-1418-689X
Marius ROMAN INCDO-INOE2000, Research Institute for Analytical Instrumentation, 67 Donath str., RO-400293, Cluj-Napoca, Romania.
Bogdan ANGYUS INCDO-INOE2000, Research Institute for Analytical Instrumentation, 67 Donath str., RO-400293, Cluj-Napoca, Romania. https://orcid.org/0000-0001-8073-6760
Gabriel BRUJ ENVIRO NATURALS AGRO SRL, 12A Preciziei str., RO-0622203, Bucharest, Romania.

DOI:

https://doi.org/10.24193/subbchem.2021.2.09

Keywords:

trace metal, aluminosilicate, barium, strontium, ICP-OES, microwave digestion.

Abstract

Ba and Sr may occur in relatively high content in natural zeolites and can contribute to the zeolites ion-exchange properties. In addition, some soluble compounds of Ba and Sr can be toxic, thus their determination is important. The aim of this paper was the development and validation of a method for determination of Ba and Sr in zeolites based on microwave-assisted acid digestion and inductively coupled plasma optical emission spectrometry (ICP-OES). For validation, a certified reference material (BCS-CRM 375/1) was used in the accuracy study, and the obtained recoveries were 92 ± 10 % for Ba and 95 ± 12 % for Sr. A mixture of HNO₃:HCl:HF of 3:9:2 (v/v/v) and a digestion time of 40 min were found to give recoveries in the range of 80-120 %. The obtained LOQs in ICP-OES allowed the quantification of concentrations above 5.0 mg kg^-1Ba and 3.8 mg kg^-1Sr. The method was applied for the determination of Ba and Sr in five zeolite samples, and concentrations of 422 – 580 mg kg^-1 for Ba and 115 – 183 mg kg^-1 for Sr were found. The obtained performance parameters were in agreement with the requirements of international guidelines regarding methods validation.

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Published

2021-06-30

How to Cite

SENILA, M., CADAR, O., SENILA, L., BECZE, A., ROMAN, M., ANGYUS, B., & BRUJ, G. (2021). A STRAIGHTFORWARD METHOD FOR DETERMINATION OF Ba AND Sr TOTAL CONTENT IN NATURAL ZEOLITES BASED ON MICROWAVE-ASSISTED DIGESTION AND INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY. Studia Universitatis Babeș-Bolyai Chemia, 66(2), 105–116. https://doi.org/10.24193/subbchem.2021.2.09