ISO 5397-1984 标准详情
- 标准号:ISO 5397-1984
- 中文标题:皮革 含氮量和“皮质”含量的测定 滴定法
- 英文标题:Leather; Determination of nitrogen content and "hide substance"; Titrimetric method
- 标准类别:国际标准化组织标准ISO
- 发布日期:1984-03
The principle consists in decomposition of a test portion by Kjeldahl method, distillation of the ammonia liberated, determination of the nitrogen content by titration of the ammonia with sulfuric or hydrochloric acid, using phenolphthalein as indica
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