Analysis of Diacetyl and 2,3-pentanedione in Beer Using Nexis™ GC-2030

Introduction

Among the off-flavors in beer, there are diacetyl and 2,3-pentanedione (collectively known as vicinal diketone: VDK). More than a certain level of VDK, which is generated during fermentation, gives beer its "butterscotch" aroma. The concentration of VDK needs to be controlled to prevent it from affecting the flavor of the beer. This report presents the quantitative results for VDK and changes in VDK level before and after main fermentation in two commercially available beer samples.

July 6, 2023 GMT