<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The aim of this study was to determine the phytochemical content of Moroccan Jujube Honey and to establish the principal components of this staple Moroccan food, which contributes health benefit for the local population. Total phytochemical compounds as determined by analytical HPLC-ESI-MS in the honey extracts were 29.39±5.21 mg/kg (range 16.64–42.16) wet weight. The individual phytochemical compounds definitively identified by HPLC-DAD-ESI-MS in the Jujube honeys were the alkaloids: (I) 4-hydroxyquinoline glucoside, (II) 4-hydroxyquinoline and (V) kynurenic acid (17.66±0.87 mg/kg), and the phenolic compounds: (III) p-hydroxybenzoic acid, (IV) caffeic acid and (VI) methyl syringate (11.73±0.50 mg/kg). The structures were confirmed by GC-EI-MS apart from 4-hydroxyquinoline-glucoside. The major components were methyl syringate (8.34±2.49 mg/kg), 4-hydroxyquinoline (6.61±3.23 mg/kg) and kynurenic acid (6.56±0.97 mg/kg). The mean content of polyphenolic compounds (11.73±0.50 mg/kg) of Moroccan Jujube honeys compared favorably with those described for six Chinese Jujube honeys (2.49 mg/kg), five commercial Jujube honeys from different countries (0.92 mg/kg) and twelve Jujube honeys from Yemen (25.71 mg/kg). Reference studies did not identify alkaloids as components of Jujube honey, and therefore the phytochemical profile of Moroccan Jujube honey appears to be unique.</p></abstract>

The aim of this study was to determine the phytochemical content of Moroccan Jujube Honey and to establish the principal components of this staple Moroccan food, which contributes health benefit for the local population. Total phytochemical compounds as determined by analytical HPLC-ESI-MS in the honey extracts were 29.39±5.21 mg/kg (range 16.64–42.16) wet weight. The individual phytochemical compounds definitively identified by HPLC-DAD-ESI-MS in the Jujube honeys were the alkaloids: (I) 4-hydroxyquinoline glucoside, (II) 4-hydroxyquinoline and (V) kynurenic acid (17.66±0.87 mg/kg), and the phenolic compounds: (III) p-hydroxybenzoic acid, (IV) caffeic acid and (VI) methyl syringate (11.73±0.50 mg/kg). The structures were confirmed by GC-EI-MS apart from 4-hydroxyquinoline-glucoside. The major components were methyl syringate (8.34±2.49 mg/kg), 4-hydroxyquinoline (6.61±3.23 mg/kg) and kynurenic acid (6.56±0.97 mg/kg). The mean content of polyphenolic compounds (11.73±0.50 mg/kg) of Moroccan Jujube honeys compared favorably with those described for six Chinese Jujube honeys (2.49 mg/kg), five commercial Jujube honeys from different countries (0.92 mg/kg) and twelve Jujube honeys from Yemen (25.71 mg/kg). Reference studies did not identify alkaloids as components of Jujube honey, and therefore the phytochemical profile of Moroccan Jujube honey appears to be unique.

HPLC-ESI-MS and GC-EI-MS Identification and Quantitation of Polyphenolics and Alkaloids in Moroccan Jujube Honeys

Department of Biology, Faculty of Sciences

Journal of Apicultural Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The aim of this study was to determine the phytochemical content of Moroccan Jujube Honey and to establish the principal components of this staple Moroccan...

HPLC-ESI-MS and GC-EI-MS Identification and Quantitation of Polyphenolics and Alkaloids in Moroccan Jujube Honeys

Article Category: Original paper

Published Online: Dec 18, 2020

Page range: 287 - 299

Received: Feb 06, 2020

Accepted: Sep 14, 2020

DOI: https://doi.org/10.2478/jas-2020-0029

Keywords
4-(1′-Hydroxy-1′-dimethyl) cyclohexa-1,3-diene-1 carboxylic acid-1-gentobioside, 4-hydroxyquinoline glucoside, 4-hydroxyquinoline, Jujube honey, kynurenic acid, methyl syringate, phenolic acid

© 2020 Farid Khallouki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

HPLC-ESI-MS and GC-EI-MS Identification and Quantitation of Polyphenolics and Alkaloids in Moroccan Jujube Honeys

Article Category: Original paper

Published Online: Dec 18, 2020

Page range: 287 - 299

Received: Feb 06, 2020

Accepted: Sep 14, 2020

DOI: https://doi.org/10.2478/jas-2020-0029

Keywords4-(1′-Hydroxy-1′-dimethyl) cyclohexa-1,3-diene-1 carboxylic acid-1-gentobioside, 4-hydroxyquinoline glucoside, 4-hydroxyquinoline, Jujube honey, kynurenic acid, methyl syringate, phenolic acid

© 2020 Farid Khallouki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
4-(1′-Hydroxy-1′-dimethyl) cyclohexa-1,3-diene-1 carboxylic acid-1-gentobioside, 4-hydroxyquinoline glucoside, 4-hydroxyquinoline, Jujube honey, kynurenic acid, methyl syringate, phenolic acid