International Standard
ISO 1061:1990
Plastics — Unplasticized cellulose acetate — Determination of free acidity
Reference number
ISO 1061:1990
ISO 1061:1990
Edición 2
1990-11
1990-11
© ISO 2024
International Standard
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ISO 1061:1990
5553
No disponible en español
Publicado
(Edición 2, 1990)
Esta norma se revisó y confirmó por última vez en 2020.
Por lo tanto, esta versión es la actual.
Resumen
The free acidity determined by this method includes acidity extractable by water and acidity due to acidic groups directly attached to the cellulose acetate, e.g. carboxyl groups. This method is not suitable for cellulose acetate containing any additives which may affect the test. The principle consists in treating a test portion of cellulose acetate with water and titrating the resultant solution with sodium hydroxide solution. The free acidity is calculated as the percentage, by mass, of free acetic acid in the cellulose acetate. This second edition cancels and replaces the first edition ISO 1061:1975, of which it constitutes a minor technical revision.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1990-11Etapa: Norma Internacional confirmada [90.93]
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Edición: 2Número de páginas: 2
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Comité Técnico :ISO/TC 61/SC 9ICS :83.080.20
- RSS actualizaciones
Ciclo de vida
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Anteriormente
RetiradaISO 1061:1975
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Ahora
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