ISO 2227:1972

Status : Published (Under review)

This standard was last reviewed and confirmed in 2023. 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 specified method is applicable to HCHO contents between 25 5 and 45 %. The field of application may be extended by siutably modifying the mass of the test portion. The principle consists in the reaction of the test solution with a neutral sodium sulphite solution, and acidimetric titration of the liberated sodium hydroxide in presence of thymolphthalein as indicator.

General information

Status
: Published

Publication date
: 1972-12

Stage
: International Standard confirmed [90.93]
Edition
: 1

Number of pages
: 2
Technical Committee :
ISO/TC 47

ICS :
71.080.80
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