Metal-organic framework application for mercury speciation using solid phase extraction followed by direct thermal release–electrothermal atomization atomic absorption spectrophotometric detection (ETA AAS)

Metal-organic framework application for mercury speciation using solid phase extraction followed by direct thermal release–electrothermal atomization atomic absorption spectrophotometric detection (ETA AAS) Full article

Journal

Analytica Chimica Acta
ISSN: 0003-2670 , E-ISSN: 1873-4324

Output data

Year: 2021, Volume: 1177, Article number : 338795, Pages count : 10 DOI: 10.1016/j.aca.2021.338795

Authors

Volynkin Sergey S. ¹ , Demakov Pavel A. ¹ , Shuvaeva Olga V. ^1,2 , Kovalenko Konstantin A. ¹

Affiliations

1	Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Lavrentiev Avenue, Novosibirsk, 630090, Russia
2	Novosibirsk State University, 2, Pirogova Str., 630090, Novosibirsk, Russia

Metal-organic frameworks (MOFs) are increasingly used in analytical chemistry for pre-concentration of trace elements followed by their determination using modern analytical techniques. However, there are a limited number of publications concerning the use of MOFs for speciation purposes, while their structural and functional features are perspective for the element species selective extraction and pre-concentration. It is known that mercury refers to the most hazardous elements which species demonstrate different toxicity, migration routes and bioavailability as well. Consequently the development of new approaches for mercury speciation in environments remains an actual objective of analytical chemistry. In present work a new methodology for inorganic and organic mercury speciation in water was proposed. This approach is based on pre-concentration using solid phase extraction (SPE) followed by their determination directly from the solid phase with the application of the thermal release – electrothermal-atomic-absorption technique (TR-ETA-AAS). An original SPE-procedure based on the use of UIO-66 [Zr6O4(OH)4(bdc)6] in two different modes (non-modified and modified with cysteine) as a sorbent was designed. As a result of SPE as well as TR-ETA-AAS optimization the detection limits (LOD) for all listed species at the level of 0.06 μg L−1 have been achieved. It was also shown that the presence of the other elements (K, Na, Ca, Mg at the level of 100 μg L−1, and Mn, Fe, Cr, Al, Zn, Cd, Pb - of 25 μg L−1) does not affect the results obtained. The developed assay demonstrates a high efficiency, low LODs, wide linear range and admissible analysis duration. The reliability of the data obtained was confirmed by the standard addition approach and by a comparison with the results of independent analytical methods.

Volynkin S.S. , Demakov P.A. , Shuvaeva O.V. , Kovalenko K.A.
Metal-organic framework application for mercury speciation using solid phase extraction followed by direct thermal release–electrothermal atomization atomic absorption spectrophotometric detection (ETA AAS)
Analytica Chimica Acta. 2021. V.1177. 338795 :1-10. DOI: 10.1016/j.aca.2021.338795 WOS Scopus РИНЦ OpenAlex

Submitted:	Feb 19, 2021
Published print:	Sep 8, 2021

Web of science:	WOS:000672564100001
Scopus:	2-s2.0-85116171965
Elibrary:	47101594
OpenAlex:	W3176357363

DB	Citing
Web of science	25
Scopus	27
Elibrary	22
OpenAlex	28