ČSN EN ISO 23649 (793898)

Chemikálie pro koželužský průmysl - Stanovení cyklosiloxanů (Norma k přímému použití jako ČSN).

NORMA vydaná dňa 1.8.2025

The information about the standard:

Designation standards: ČSN EN ISO 23649
Classification mark: 793898
Catalog number: 521570
Publication date standards: 1.8.2025
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Czech technical standard
Kategória: Technické normy ČSN

Annotation of standard text ČSN EN ISO 23649 (793898):

This document specifies a method for determining the total content of the following cyclosiloxanes in chemicals for the leather tanning industry:
- octamethylcyclotetrasiloxane (D4);
- decamethylcyclopentasiloxane (D5);
- dodecamethylcyclohexasiloxane (D6);
This method requires the use of gas chromatography (GC) equipped with a single quadrupole mass spectrometer (MS) to identify and quantify the cyclosiloxanes