engleski

Pollen spectrum and physicochemical attributes of Croatian Mediterranean multiforal honeys

The aim of this work was to determine which floral sources prevail in Croatian Mediterranean multifloral honeys and its physicochemical characteristics. Honey (55 samples) verified by pollen analysis as multifloral, were collected during the 2004 harvest directly from beekeepers from different locations across Croatian Mediterranean area. The following determinations were carried out: moisture content, electrical conductivity, specific rotation, pH and acidity, hydroxymethylfurfural (HMF), diastase and invertase activity, proline content and sugar composition. Pollen analysis of honey samples showed a wide variety of botanical sources. In a melissopalynological study of investigated honey samples, 78 pollen types were identified. Samples ranged from 8 to 21 different plant species. The principal species identified were: Paliurus spina christi, Fraxinus ornus and Trifolium pratense gr. In accordance with a variety of nectar sources, samples have relatively wide range of physicochemical parameters: electrical conductivity (0.14 mS/cm - 0.87 mS/cm), pH (3.74 - 5.12) and free acidity (11.3 meq/kg - 37.1 meq/kg), specific rotation ((-15.4) - (-4.1)), proline content (234 mg/kg - 960 mg/kg), invertase (6.2 U/kg - 405.8 U/kg) and diastase activity (Schade scale) (14.1- 57.7). Though samples are diverse, all together they have high enzymatic activity which is followed by low HMF content.

pollen spectrum; Croatian multifloral honey

nije evidentirano