ISO-4326 › Non-ionic surface active agents -- Polyethoxylated derivatives -- Determination of hydroxyl value -- Acetic anhydride method
The following bibliographic material is provided to assist you with your purchasing decision:
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 od sodium hydroxide solution used for the titration of the blank and of the test solution.
To find similar documents by classification:
This document comes with our free Notification Service, good for the life of the document.
This document is available in either Paper or PDF format.
Customers who bought this document also bought:MIL-STD-810
Environmental Engineering Considerations and Laboratory Tests
Reliability Prediction of Electronic Equipment
March 1, 1980
ISO TC 91