ISO 1061:1990
p
ISO 1061:1990
5553

Status : Published (Under review)

This standard was last reviewed and confirmed in 2020. Therefore this version remains current.
en
Format Language
std 1 42 PDF
std 2 42 Paper
  • CHF42
Convert Swiss francs (CHF) to your currency

Abstract

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.

Read sample 

Preview this standard in our Online Browsing Platform (OBP)

General information

  •  : Published
     : 1990-11
    : International Standard confirmed [90.93]
  •  : 2
     : 2
  • ISO/TC 61/SC 9
    83.080.20 
  • RSS updates

Life cycle

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)