THE PHYSICO-CHEMICAL PROPERTIES AND COMPOSITION OF HONEYS OF DIFFERENT BOTANICAL ORIGIN

摘要

The concentration of macro- and microelements, the free- and lactone acids, the electrical conductivity and the proline content were measured in honeys of known botanical origin. For the measurement of mineral composition a Thermo-Jarrel-Ash simultaneous multielement ICP-AES spectrometer, type ICAP-9000 was used. The free and lactone acids were determined by an A.O.A.C. titrimetric method. The electrical conductivity was measured in a solution of 20% dry matter content. To analyse the proline content a spectrophotometric method was used. The results show that floral honeys and honeydew honeys can be distinguished by the measured parameters. Among the floral honeys acacia honey differs the most from the others in its proline and total element content as well as in its free and total acid content. We used discriminant analysis to distinguish honeys of known botanical origin. For this purpose we considered 12 variables of 28 honey samples of 6 types produced in 1993. We calculated the discriminant functions considering several combinations of the variables. The result was that fructose and glucose content, electrical conductivity and proline content account the most for distinguishing among the groups.