Wine hazing: A predictive assay based on protein and glycoprotein independent recovery and quantification

A two-step method to recover separately wine proteins and glycoproteins, useful to quantify and to analyse them by electrophoresis, has been presented. Five different unclarified wines from North of Italy were utilised. The results indicate that in our samples protein and glycoprotein concentrations are different while their electrophoretic patterns are almost superimposable. Finally, relations between protein and glycoprotein concentrations and haze tendency of the different wines were investigated. The results confirm the existence of a straight correlation between haze tendency and both protein concentration and protein/glycoprotein ratio.