DIN EN ISO 8988:2006-11
Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method (ISO 8988:2006); German version EN ISO 8988:2006
| Fecha edición: |
2006-11-01
En Vigor
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| Idiomas disponibles: | Inglés, Alemán |
| Resumen: | This standard specifies three methods for the determination of the hexamethylenetetramine ("hexa") content of phenolic resins. The three methods are equivalent. The Kjeldahl method described in clause 3 is not applicable if there are other components containing nitrogen in the phenolic resin. The perchloric acid method and the hydrochloric acid method described in clause 4 and clause 5 are only applicable if there are no other basic or acidic additives in the resin. If the resin contains additives which can be oxidized by perchloric acid, only the hydrochloric acid method (clause 5) is applicable. |
| Keywords: | Chemical analysis and testing|Determination of content|Hexamethylene tetramine|Kjeldahl|Kjeldahls method|Methods|Perchloric acid|Phenolic resins|Plastics|Resins|Testing |
| ICS: | 83.080.10 - Materiales termoestables |
| CTN: | |
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Equivalencia Internacional |
Idéntica EN ISO 8988:2006 Idéntica ISO 8988:2006 |
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Reemplazo Normas |
Reemplaza a DIN EN ISO 8988:1997-05 Reemplaza a DIN EN ISO 8988:2005-04 |
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