Phytochemical analysis of different medicinal herbal teas and evaluation of their microbiological properties

ONLINE ISSN: 2335-8718Natural products with antioxidant properties have been extensively utilized in the pharmaceutical and food industry. Medicinal herbs are safe and have less side effects than chemical treatments. Medicinal herbal tea has a beneficial effect on the health - the containing antioxidants can help to bind free radicals, caused by infectious processes or side effects of medicine. In order to evaluate total content of phenolic compounds, flavonoids and activity three herbal teas have been chosen - “Bronchos”, “Hemoranta” and “Diabetoset”. Phytochemical analysis has been done using spectrophotometric method with methanol and water extracts. A new QUENCHER procedure was applied in order to achieve better recovery of total content of phenolic compounds in solid substance of different samples. Composition of essential oil components were determined using gas chromatography – mass spectrometry (GC-MS) method, using solid phase microextraction (SPME). Antibacterial activity is assessed using an agar disk and well methods. Bacterial cultures that were used are Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923Gamtos mokslų fakultetasInstrumentinės analizės APCVytauto Didžiojo universiteta