Fluorescence or turbidity? The secret of dark beers
enerally, results obtained with different brands of turbidity meters correlate very well for lager beers, but can differ substantially for dark beers. The reason for this effect can be found in the fluorescence of the sample. Depending on the optical design of a turbidity meter, the fluorescence of dark beers can cause a considerable apparent increase of the turbidity results. In this paper, four turbidity meters from different manufacturers are compared with one another.
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