VIEW ARTICLE DOI: 10.1094/ASBCJ-38-0159
Further Studies on an Improved Micro Method for Determination of Vicinal Diketones in Beer. Takashi Inoue, Research Laboratories of Kirin Brewery Co., Ltd., Takasaki, Gumma Pref., 370-12, Japan. J. Am. Soc. Brew. Chem. 38:0159, 1980.
Studies on an improved micro method for determination of vicinal diketones in beer are reported. The concentration of K2HPO4 in the reaction mixture was found to affect the intensity of color. Use of water instead of K2HPO4 solution for adjusting the final volume resulted in a good linear relation between the concentration of vicinal diketones and the absorbance, and it improved the precision of the method. The chromogen was stable for at least 30 min.
Keywords: Beer, Colorimetry, Diacetyl, Vicinal diketone