tube d'imprégnation
- Domaine
-
- protection de l'environnement lutte contre la pollution de l'air
- Date
Note :
Mesure de la concentration des polluants de l'air.
Terme :
- tube d'imprégnation n. m.
Traductions
-
anglais
Date :Définition
A sealed polymer tube containing a liquefied sample of a given, normally gaseous, substance. At a fixed temperature this substance diffuses through the walls of the tube at a constant rate, so that by allowing a stream of air to flow past the tube at a known rate, mixtures of this gas with air at very low, but accurately known, concentrations can be prepared.
Note :
This method is commonly used for calibrating instruments and analytical methods used for measuring concentrations of pollutants in air.
Terme :
- permeation tube