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Molecules 2017, 22(11), 1909; doi:10.3390/molecules22111909

Headspace Solid-Phase Microextraction and Ultrasonic Extraction with the Solvent Sequences in Chemical Profiling of Allium ursinum L. Honey

1
Department of Organic Chemistry, Faculty of Chemistry and Technology, University of Split, Rudera Boskovica 35, 21000 Split, Croatia
2
Department of Pharmacognosy, Wroclaw Medical University, ul. Borowska 211a, 50-556 Wroclaw, Poland
*
Author to whom correspondence should be addressed.
Received: 17 October 2017 / Accepted: 4 November 2017 / Published: 6 November 2017
(This article belongs to the Special Issue Diversity of Terpenoids)
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Abstract

A volatile profile of ramson (wild garlic, Allium ursinum L.) honey was investigated by headspace solid-phase microextraction (HS-SPME) and ultrasonic solvent extraction (USE) followed by gas chromatography and mass spectrometry (GC-FID/GC-MS) analyses. The headspace was dominated by linalool derivatives: cis- and trans-linalool oxides (25.3%; 9.2%), hotrienol (12.7%), and linalool (5.8%). Besides direct extraction with dichloromethane and pentane/diethyl ether mixture (1:2, v/v), two solvent sequences (I: pentane → diethyl ether; II: pentane → pentane/diethyl ether (1:2, v/v) → dichloromethane) were applied. Striking differences were noted among the obtained chemical profiles. The extracts with diethyl ether contained hydroquinone (25.8–36.8%) and 4-hydroxybenzoic acid (11.6–16.6%) as the major compounds, while (E)-4-(r-1′,t-2′,c-4′-trihydroxy-2′,6′,6′-trimethylcyclohexyl)but-3-en-2-one predominated in dichloromethane extracts (18.3–49.1%). Therefore, combination of different solvents was crucial for the comprehensive investigation of volatile organic compounds in this honey type. This particular magastigmane was previously reported only in thymus honey and hydroquinone in vipers bugloss honey, while a combination of the mentioned predominant compounds is unique for A. ursinum honey. View Full-Text
Keywords: Allium ursinum L. honey; headspace solid-phase microextraction (HS-SPME); ultrasonic solvent extraction (USE) with the solvent sequence; (E)-4-(r-1′,t-2′,c-4′-trihydroxy-3′,6′,6′-trimethylcyclohexyl)-but-3-en-2-one; hydroquinone; methyl syringate; 4-hydroxybenzoic acid Allium ursinum L. honey; headspace solid-phase microextraction (HS-SPME); ultrasonic solvent extraction (USE) with the solvent sequence; (E)-4-(r-1′,t-2′,c-4′-trihydroxy-3′,6′,6′-trimethylcyclohexyl)-but-3-en-2-one; hydroquinone; methyl syringate; 4-hydroxybenzoic acid
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jerković, I.; Kuś, P.M. Headspace Solid-Phase Microextraction and Ultrasonic Extraction with the Solvent Sequences in Chemical Profiling of Allium ursinum L. Honey. Molecules 2017, 22, 1909.

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