Naslov
Microwave digestion and ICP-MS analysis of antimicrobially active microcapsules

Autori
Rezić, Iva ; Majdak, Mislav ;

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
European Winter Plasma Conference 2023, Book of Abstracts / - Ljubljana, 2023, 187-187

Skup
European Winter Plasma Conference 2023, Book of Abstracts

Mjesto i datum
Ljubljana, Slovenia, 29.01.2023. - 03.02.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ICP-MS ; microcapsules ; microwave digestion ; silver ; zinc

Sažetak
For the purpose of this investigation, a sensitive, and rapid inductively coupled plasma mass spectrometry (ICP-MS) spectroscopy was applied in determination of antimicrobialy active elements of the core/shell microcapsules. Microcapsules of different sizes (120 and 450 μm) and chemical composition were prepared with zinc and sodium alginate in the shell (and with or withouth chitosan), as well as filled with the antimicrobial silver in the core. After preparation, and prior the analysis, the samples were digested in an microwave oven using 55.55% v/v HNO3 and 44.45% v/v H2O2. Digested samples were transferred to ICP-MS and analysed with aim to monitor the levels of zinc and silver, both being powerful antimicrobial agents. The results show that there is a significant difference in levels of antimicrobial metals between samples prepared with and without chitosan. Whilst Zn levels appeared marginally higher (up to 20 %) in the group of samples prepared without chitosan, compared with the group with it, the Ag content showed larger overall variability (more than 72%). Particularly, smaller microcapsules (120 μm), had the following elemental composition of antimicrobial metals: 98.32 μg/g of Ag and 106.75 μg of Zn. In contrast, three times larger microcapsules (450 μm) contained two times higher amounts of silver (190.98 μg/g) and only 20 % higher amounts of zinc (121.35 μg/g). Nevertheless, after performing the leaching experiments, obtained results proved that the amounts of antimicrobial elements were high enough for efficient antimicrobial activity of newly prepared microcapsules. Therefore such samples can be efficiently applied as antimicrobial coatings on many different items.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Tekstilna tehnologija

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