Published in Scientific Bulletin. Series F. Biotechnologies, Vol. XXIV, Issue 2
Written by Daniela PAULIUC, Mircea OROIAN
The aim of this study was to evaluate the physicochemical characteristics of rape honey collected from different regions of Romania. Five rape honey samples were selected to determine their physicochemical parameters, sugar content and antioxidant activity, including total polyphenols content and total flavonoids content. The results of the melissopalynological analysis showed that all honey samples have a percentage of pollen grains Brassica napus well above the minimum of 45%, which is necessary to classify the samples as monofloral honey. The results obtained for rape honey samples indicated a low electrical conductivity (118-173 μS/cm), a pH between 4.03-4.24 and a free acidity between 12.37-25.54%. The limit set for HMF content was exceeded by a sample of rape honey (48.6 mg HMF/kg) and the moisture content varied between 17.30-19.12% and was not exceeded the moisture content set by Codex Alimentarius (20%). Fructose, glucose, sucrose, maltose, turanose, trehalose, melezitinose, and raffinose were identified and quantified in all samples. Results were submitted to analysis of variance (ANOVA) using Statgraphics Centurion XVIII software trial version.
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