NEN ISO 172-1979 标准详情
- 标准号:NEN ISO 172-1979
- 中文标题:
- 英文标题:Plastics - Phenol-formaldehyde Mouldings - Detection Of Free Ammonia
- 标准类别:荷兰国家标准NEN
- 发布日期:
Defines a qualitative method of detecting the presence of free ammonia or other volatile bases in phenol-formaldehyde mouldings by the exposure of an indicator paper to the vapour from a powdered sample. It may be used when the absence of free ammoni
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