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2018, vol. 7, br. 1, str. 47-55
Analiza interakcije hroma sa N-donor ligandima putem elektrosprej-jonizacione masene spektrometrije
Univerzitet u Nišu, Prirodno-matematički fakultet

e-adresadarko.andjel@outlook.com
Projekat:
Proizvodnja novih dijetetskih mlečnih proizvoda za rizične populacije zasnovana na kvalitativnoj i kvantitativnoj analizi biohemijskih markera zdravstvenog rizika konzumiranja mleka (MPNTR - 31060)

Ključne reči: hrom; pesticidi; ligandi; elektrosprej-jonizaciona masena spek­trometrija
Sažetak
Izvršena je analiza interakcije hroma(III) sa 2,2'-bipiridinom i dva pesticida, atrazinom i acetamipridom, kao N-donor ligandima, putem elektrosprej-jonizacione masene spektrometrije (ESI-MS) i UV/Vis spektrofotometrije. Atrazin i acetamiprid, pesticidi u širokoj upotrebi, su odabrani za ispitivanje zbog njihovog dokazanog toksičnog efekta u životnoj sredini, dok je 2,2'-bipiridin odabran za poređenje, usled svoje izražene sposobnosti da gradi komplekse sa metalima. Hrom(III) kao jon toksičnog teškog metala, formira brojna stabilna kompleksna jedinjenja. Heterogenost i kompleksnost prirodnih matriksa opravdavaju upotrebu model sistema kao ovde ispitivanih, u cilju evaluacije kompleksnih procesa u životnoj sredini. In­tenzitet interakcija je doveden u korelaciju sa kiselo-baznim i elektron-donor oso­binama, kao i brojem i pozicijom N-donor atoma u ispitivanim ligandima. Rezultati dobijeni UV/Vis spektrofotometrijom su upoređeni sa rezultatima dobijenih ESI-MS metodom. UV/Vis spektrofotometrija i ESI-MS kvantifikacija su pokazale značajne razlike po informacijama koje pružaju u opisivanju interakcija hroma(III) sa ligandima, pri čemu se ESI-MS metoda pokazala superiornom. ESI-MS tehnika može biti uzeta za kvantitativne analize sistema Cr(III)-ligand. ESI-MS hromatogrami jonske struje pri radu sa 20 μL loop injektiranjem sistema Cr(III)-ligand pokazuju stabilne pikove i integritet signala.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/savteh1801047A
objavljen u SCIndeksu: 06.07.2018.

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