VIEW ARTICLE    DOI: 10.1094/ASBCJ-41-0152

Improved Methods for the Determination of Wort Color and Turbidity. B. K. Lukes and T. J. O'Brien, Great Western Malting Co., Vancouver, WA 98668. J. Am. Soc. Brew. Chem. 41:0152, 1983.

Instrumental methods for determination of wort color and turbidity either previously proposed or currently in use were reviewed. New techniques developed included a wort-color calibration based on a buffered solution of phenol red, and compensation for turbidity in determination of wort color by use of modified absorbance values obtained at 400 and 500 nm. To overcome color influence in nephelometric wort turbidity determinations, known addition methods were applied using formazin for achromatic turbidity addition to wort. Particle size distributions of turbidity in wort, formazin solutions, wort-formazin mixtures, and barium sulfate solutions were determined.

Keywords: Addition method, Color, Formazin, Phenol red, Turbidity, Wort