INVERTASE ACTIVITY AND CARBOHYDRATE SPECTRUM OF ORGANIC ACACIA AND POLYFLORAL HONEY AFTER ONE-YEAR STORAGE

摘要

The invertase activity and carbohydrate spectrum of organic acacia and polyfloral honeys produced in the South Stara Planina region (Republic of Bulgaria) were investigated. After one year of storage at a temperature up to 25 °С, a mild reduction in invertase activity (3.9–4.79%) has occurred in polyfloral honey. The activity of this enzyme decreased considerably in acacia honey (15.16%). The average content of carbohydrates of acacia honey after one-year storage was: fructose – 42.76±1.24 g/100 g, glucose – 27.5±1.11 g/100 g, fructose/glucose ratio – 1.55±0.05, sucrose – 0.60±0.63 g/100 g, turanose – 1.18±0.21 g/100 g, maltose – 0.54±0.36 g/100 g, trehalose – 0.28±0.04 g/100 g. The re- spective carbohydrates in polyfloral honey were fructose (41.16±0.81 g/100 g), glucose (27.11±0.85 g/100 g), fructose/glucose ratio (1.51±0.07), sucrose (0.14±0.20 g/100 g), turanose (1.17±0.26 g/100 g), maltose (0.90±0.69 g/100 g), trehalose (0.65±0.19 g/100 g). Neither melibiose nor melezitose were established in both types of honey.