| Title: | Polyphenols from Sage Leaves (Salvia officinalis L.) : environmentally friendly extraction under high hydrostatic pressure and application as a corrosion inhibitor for tinplate |
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| Authors: | ID Dent, Maja (Author)
ID Fuchs-Godec, Regina (Author)
ID Pedisić, Sandra (Author)
ID Grbin, Dorotea (Author)
ID Dragović-Uzelac, Verica (Author)
ID Ježek, Damir (Author)
ID Bosiljkov, Tomislav (Author) |
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| Files: |  separations-11-00158-v2.pdf (4,17 MB)
MD5: A7D77A569E2D7A0FF30236127ED4DD77
 https://www.mdpi.com/2297-8739/11/5/158
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | Due to the diversity of organic molecular structures present in sage extract, sage extract is a promising potential source of a cheap and effective biodegradable green corrosion inhibitor for tinplate in 3% NaCl solution, which was evaluated in this study. HHP proved to be a new and emerging technology for the useful extraction of polyphenols from sage as a functional ingredient from natural sources. Analysis of variance among all tested independent factors (ethanol concentration, HHP parameters and temperature) revealed significant differences (p < 0.05) in total polyphenol content as well as for rosmarinic acid as the major phenolic compound in sage extract, while extraction time had no effect (p ˃ 0.05). The optimum HHP conditions (600 MPa, 30% ethanol, 60 °C and 5 min) gave a maximum extraction yield of total polyphenols of 3811.84 mg/100 g. Sage-leaf extracts were found to be a mixture of phenolic acids, namely rosmarinic and salvianolic acid K, epicatechin and luteolin-7-O-glucuronide glycoside. The corrosion results show that the sage extract at a concentration of 0.6 g/L in 3% NaCl is an effective corrosion inhibitor (93%), forming a passivation layer of sage extract consisting of organic compounds such as polyphenols on the surface of tinplate. |
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| Keywords: | high hydrostatic pressure extraction, corrosion inhibitor, sage, rosmarinic acid, polyphenols |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 22.03.2024 |
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| Article acceptance date: | 14.05.2024 |
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| Publication date: | 17.05.2024 |
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| Publisher: | MDPI |
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| Year of publishing: | 2024 |
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| Number of pages: | 19 str. |
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| Numbering: | Vol. 11, iss. 5, [article no.] 158 |
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| PID: | 20.500.12556/DKUM-96768  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 2297-8739 |
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| COBISS.SI-ID: | 196201475 |
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| DOI: | 10.3390/separations11050158 |
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| Copyright: | © 2024 by the authors |
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| Publication date in DKUM: | 28.01.2026 |
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| Views: | 218 |
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| Downloads: | 1 |
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| Metadata: |    |
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| Categories: | Misc.
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