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Spectrophotometric determination of color intensity of whiskey collaborative study


, : Spectrophotometric determination of color intensity of whiskey collaborative study. Journal of the Association of Official Analytical Chemists 65(2): 224-226

A method for measuring color intensity of whiskey was developed to replace the present AOAC [Association of Official Analytical Chemists] method, which is obsolete. The new method was collaboratively studied in 20 persons. Color intensity of whiskey was measured as absorbance by a spectrophotometer, using a 1 cm cell, a bandwidth .ltoreq. 10 nm, and a wavelength of 525 nm. Water was used as reference. Collaborator results appear acceptable for whiskey samples that vary in color intensity from 29 to 374 CIU (absorbance .times. 1000 = Color Intensity Units). The maximum SD and coefficient of variation were 5.8 CIU and 6.68%, respectively. The method has been adopted official first action.

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