ISO 7327:1994

Status : Published (Under review)

This standard was last reviewed and confirmed in 2020. Therefore this version remains current.

	Format	Language
std 1 40	PDF
std 2 40	Paper

CHF40

Convert Swiss francs (CHF) to your currency

Abstract

The principle of the method specified is reacting a small amount of free acid present in a test portion of acid anhydride hardener or accelerator with rhodamine 6G to colour the test solution pink, measuring the absorbance of the coloured solution at a wavelength of about 510 nm using a spectrometer, determining the free-acid content from a calibration curve. The method is suitable for most anhydrides except for polyester and oligomeric anhydrides which may give too wide a scatter of results.

General information

Status
: Published

Publication date
: 1994-07

Stage
: International Standard confirmed [90.93]
Edition
: 1

Number of pages
: 3
Technical Committee :
ISO/TC 61/SC 12

ICS :
83.080.10
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