[show abstract][hide abstract] ABSTRACT: The concept of electronic tongue or taste sensor has been developed rapidly in the last decade due to their large potential in food quality control. The electronic tongue is based on electrochemical sensors combined with multivariate data analysis. The aim of this study was to evaluate the discriminating ability of the electronic tongue for the recognition of different milk and yoghurt samples from different producers and various dairy products from one producer. The results were evaluated by multivariate data analysis - Principal components analysis. The electronic tongue α-ASTREE (Alpha M.O.S) has successfully distinguished five brands of milk purchased on the Croatian market, five brands of yoghurt also purchased on Croatian market and differentiated among various products from one dairy producer.
[show abstract][hide abstract] ABSTRACT: In this study, two types of yoghurt, plain yoghurt and probiotic yoghurt purchased from Croatian and Slovenian market, were stored for up to 25 days at two different temperatures (+4 ºC, +20 ºC). Samples were analyzed every 5 days and changes in acetaldehyde, ethanol and diacetyl content were determined. At the same time sensory evaluation was carried out. The aim of this study to show changes in concentrations of some flavor compounds and sensory quality in both yoghurt types during storage as a function of storage time and temperature. The results indicate that the equal changes in aroma compounds in both yoghurt types were result of the same microorganisms present in both yoghurt types (Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus which have the greatest influence on the aroma, while the addition of other microorganisms has mostly probiotic effect.