EN ISO 172:1998 PDF
Plastics - Phenol-formaldehyde mouldings - Detection of free ammonia (ISO 172:1978)
Plastics - Phenol-formaldehyde mouldings - Detection of free ammonia (ISO 172:1978)
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 22 июля 1998 г.
- Издание:
- CEN EN 172 edition 1 version 1
- ICS:
- 83.080.10
Specification of 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 moistened powdered sample. It may be used when the absence of free ammonia is a requirement.
Abstract
Overview
defines a qualitative laboratory method to detect the presence of free ammonia or other volatile bases in phenol-formaldehyde (phenoplast) mouldings. The method is intended for use where the absence of free ammonia is a requirement for material acceptance, safety or further processing.
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