The guidance describes methods for obtaining conditions for the successful keeping of roots of the species Armoracia rusticana Gaertner, B. Meyer and Scherbius. It includes conditions of harvesting and putting into store, and optimum conditions, such as temperature, relative humidity, air circulation and storage life.
Non-ionic surface active agents — Polyethoxylated derivatives — Determination of hydroxyl value — Ac...
The hydroxyl group is esterified by acetic anhydride in pyridine solution. The excess of acetic anhydride is hydrolized with water. The acidity which appears during the esterification and the acetic acid formed during the hydrolysis are neutralized by sodium hydroxide solution in the presence of phenolphthalein as indicator. The hydroxyl value is calculated from the difference between the volume…
