Red clover (<Emphasis Type="Italic">Trifolium pratense</Emphasis> L.) honey: volatiles chemical-profiling and unlocking antioxidant and anticorrosion capacity |
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Authors: | Igor Jerkovi? Ani Radoni? Marina Kranjac Marina Zeki? Zvonimir Marijanovi? Senka Gudi? Maja Kli?ki? |
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Institution: | 1.Department of Organic Chemistry, Faculty of Chemistry and Technology,University of Split,Split,Croatia;2.Department of Electrochemistry and Materials Protection, Faculty of Chemistry and Technology,University of Split,Split,Croatia;3.Marko Maruli? Polytechnic in Knin,Knin,Croatia |
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Abstract: | Headspace solid-phase micro-extraction (HS-SPME) and ultrasonic solvent extraction (USE) were used for red clover honey volatiles extraction. The extracts were analysed using gas chromatography and mass spectrometry (GC-MS). Lilac aldehyde isomers dominated in the headspace (individual range from 7.6 % to 21.4 %) followed by phenylacetaldehyde (10.1–31.2 %) and benzaldehyde (7.0–15.7 %). Higher aliphatic alcohols and hydrocarbons were the predominant constituents of the honey extracts. The honey and its extracts exhibited rather weak anti-radical activity (DPPH assay) and total antioxidant activity (FRAP assay). On the other hand, the honey’s inhibitive properties towards the corrosion of AA 2017A alloy in NaCl solution (potentiodynamic polarisation and potentiostatic pulse measurements) revealed the honey to be a very good anodic inhibitor (efficiency up to 76 %) while the honey extracts (USE) showed better inhibition efficacy. |
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