Welcome to WikiOdour!
Start typing in the text input box to get immediate search results
Sampling Materials
Overview
Sampling materials used throughout the odour measurement process (from obtaining a sample to analysis) require an absent or minimized inference with the odorant gas. The main criteria for the material of the sampling container/bag or device are outlined below:
- The material be inert with the odorous gas
- The material be odourless
- Material be of low permeability to prevent diffusion of odorant gas and outside environment across the material
- Opaque so as to prevent odorous gas from reacting/degrading with sunlight
- Impervious so as to
- Smooth surface
Inert Materials
Materials listed below are inert:
- Polytetrafluoroethylene (PTFE, Teflon TM)
- the copolymer of Tetrafluoroethylene and Hexafluoropropylene (FEP)
- Polyethylene terephthalate (PET, Nalophan TM )
- glass (disadvantage: fragility)
- steel (advantage: high mechanical and thermal stability; disadvantage: not always chemically inert, condensations or other depositions)