Standard

NS-EN ISO 1061:1999

Nov 1999 Published

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Abstract

This International Standard specifies a rnethod for A test Portion of cellulose acetate is tt-eated with the determination of the amount of free acid in water and the resultant Solution titrated with sodium unplasticized cellulose acetate. 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. The latter is usually a very small proportion of the total. The free acidity is calculated as the percentage, by mass, of free acetic acid in the cellulose acetate. This method is not suitable for cellulose acetate containing any additives which may affect the test. During the determination, use only reaqents of recognized analytical grade and distilled water- as specified in 4.1.

Document information

Standard from SN
Published: 10 November 1999
Edition: 1
Version: 1
Document type: NAT
ISBN:

ICS 83.080.01
ICS 83.080.20
National Committee SN/K 138/ NS 416

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Refers: ISO 585:1990
Refers: ISO 565:1990
Adopted from: EN ISO 1061:1999 , 0

NS-EN ISO 1061:1999

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Abstract

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