The necessity of monitoring of the content of vicinal diketons - 2. 3-butandione (diacetyl) and 2. 3-pentanedione - in beer is based on the fact that the exceeding of threshold concentration of perception results in the negative influence of sensorial properties of beer. called as butter aroma. https://hollandscountryclothinges.shop/product-category/horse-leg-bandages/