Naslov
MINERAL CONTENT IN DETERMINATION OF THE GEOGRAPHICAL AND BOTANICAL ORIGIN OF CROATIAN HONEY

Autori
Vahčić, Nada ; Kozlek, Damir ; Uršulin-Trstenjak, Natalija ; Gačić, Milica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

ISBN
978-0-9810247-0-7

Skup
IUFoST 2010. 15 th World Congress of Food Science and Technology

Mjesto i datum
Cape Town, Južnoafrička Republika, 22.08.2010. - 26.08.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
honey; mineral content

Sažetak
Introduction: Analysis of mineral composition can be a way of recognising and discriminating honey. Several authors have proposed alternative procedures based on chemometrical analysis of the elemental or chemical composition of honey. Therefore the aim of this study was to establish possible relationship between the mineral composition of honey and its botanical and geographical origin. Statistical data reduction and visualisation techniques including cluster analysis (CA) and principal component analysis (PCA) were used to discriminate honey according to its type and origin. Methodology: Eighty honey samples, which represent two types of nectar honey (acacia and floral), were collected from Varazdin region (north-west Croatia). Minerals (Ca, Cu, Fe, K, Mg, Mn, Na and Zn) were determined by atomic absorption spectrophotometry using a Varian Spectra AA-220 device. For chemometric calculations Statistica 8.0 for Windows (from StatSoft) was used. Results and Discussion: Samples of floral honey had higher concentrations of all investigated minerals except cooper and zinc. The average concentration (mg/kg) of the most abundant minerals in samples were: potassium 480, 23 in floral honey and 237, 49 in acacia honey ; of calcium was 69, 44 in floral and 55, 07 in acacia honey ; of sodium was 59, 79 in floral and 46, 28 in acacia honey and magnesium was 40, 0 and 27, 02 respectively. The results of ANOVA showed significant differences between two honey types regarding concentrations of all minerals except cooper and zinc. CA revealed that the type and origin of honey samples correlated with their mineral composition. The PCA highlighted the relationship between the mineral distribution and honey type too. Conclusions: The multivariate statistical analysis applied to mineral composition proved to be suitable for distinguishing honey according to its botanical and geographical origin. eight minerals allow a satisfactory separation of the honey samples, further studies must be done on other minerals and other types of honey.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA