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Article

ICP-MS Determination of Antimicrobial Metals in Microcapsules

1
Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, Croatia
2
Department of Material Testing, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, Croatia
3
Faculty of Agriculture, University of Zagreb, 10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Federico Maria Rubino
Molecules 2022, 27(10), 3219; https://doi.org/10.3390/molecules27103219
Received: 18 April 2022 / Revised: 13 May 2022 / Accepted: 16 May 2022 / Published: 18 May 2022
Silver (Ag) and zinc (Zn) are very powerful antimicrobial metals. Therefore, in this research, a high-throughput, sensitive, and rapid method was developed for the determination of Ag and Zn in microcapsules using inductively coupled plasma mass spectrometry (ICP-MS). The sample preparation procedure employed simple microwave digestion of the microcapsules with 55.55% v/v HNO3 and 44.45% v/v H2O2. The method was applied to determine Ag and Zn in microcapsule samples of different sizes (120 and 450 μm) after their preparation with and without chitosan. Prepared microcapsules, after characterization, were bonded to a polymer carrier by sol-gel procedure and the materials were characterized by FTIR spectroscopy and high-resolution optical microscopy. Significant differences were found in Ag and Zn levels between microcapsules samples prepared with and without chitosan. The results have shown that samples with chitosan had up to 20% higher levels of Zn than Ag: 120 μm microcapsules contained 351.50 μg/g of Ag and 85.51 μg/g of Zn, respectively. In contrast, samples prepared without chitosan showed larger overall variability: In microcapsules with a diameter of 120 μm, the amounts of antimicrobial metals were 98.32 μg/g of Ag and 106.75 μg of Zn, respectively. Moreover, 450 μm microcapsules contained 190.98 μg/g of Ag and 121.35 μg/g of Zn. Those quantities are high enough for efficient antimicrobial activity of newly prepared microcapsules, enabling the application of microcapsules in different antimicrobial coatings. View Full-Text
Keywords: ICP-MS; microcapsules; microwave digestion; silver; zinc ICP-MS; microcapsules; microwave digestion; silver; zinc
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MDPI and ACS Style

Rezić, I.; Škoc, M.S.; Majdak, M.; Jurić, S.; Stracenski, K.S.; Vlahoviček-Kahlina, K.; Vinceković, M. ICP-MS Determination of Antimicrobial Metals in Microcapsules. Molecules 2022, 27, 3219. https://doi.org/10.3390/molecules27103219

AMA Style

Rezić I, Škoc MS, Majdak M, Jurić S, Stracenski KS, Vlahoviček-Kahlina K, Vinceković M. ICP-MS Determination of Antimicrobial Metals in Microcapsules. Molecules. 2022; 27(10):3219. https://doi.org/10.3390/molecules27103219

Chicago/Turabian Style

Rezić, Iva, Maja Somogyi Škoc, Mislav Majdak, Slaven Jurić, Katarina Sopko Stracenski, Kristina Vlahoviček-Kahlina, and Marko Vinceković. 2022. "ICP-MS Determination of Antimicrobial Metals in Microcapsules" Molecules 27, no. 10: 3219. https://doi.org/10.3390/molecules27103219

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