ISO 4326-1980 标准详情
- 标准号:ISO 4326-1980
- 中文标题:非离子表面活性剂 聚乙氧基化衍生物 羟值的测定 乙酐法
- 英文标题:Non-ionic surface active agents; Polyethoxylated derivatives; Determination of hydroxyl value; Acetic anhydride method
- 标准类别:国际标准化组织标准ISO
- 发布日期:1980-03
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 b
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