2.2. Sampling
After thorough mixing of the fermenting broth, samples (100 ml) were collected at various stages of beer
preparation:
Stage 1, at the beginning of lactic acid fermentation
to evaluate the initial content of the mixture, before souring.
Stage 2, at the end of lactic acid fermentation, after
heating, cooling and addition of malt and sugar for
HG brews (wort stage).