Sorbent-retaining gauzes
Sorbent-retaining gauzes are located at either end of a metal tube and between each bed of sorbent. The primary gauze is accurately positioned in the groove of the tube to help define the 15 mm air gap required for diffusive sampling, enabling use of published uptake rates. The final gauze is retained with a gauze-retaining spring.
- Allows gas to flow through a thermal desorption tube without causing compound retention or increased impedance
- Primary gauze prevents particulates and debris entering the tube
- Secure positioning of sorbent prevents loss during sampling, transport, storage and analysis
Product List
Showing 5/5 results
Gauze- sorbent retaining- stainless steel
pk 20
Product Code
C-GZ020
Gauze- sorbent retaining- stainless steel
pack of 200
Product Code
C-GZ200
Gauze- sorbent retaining- stainless steel
pack of 2000
Product Code
C-GZ2000
Gauze- sorbent retaining- Inert
10 pack
Product Code
C-GZI10
Gauze- sorbent retaining- Inert
pack of 100
Product Code
C-GZI100
Overview
All Markes’ stainless steel and inert-coated stainless steel tubes ship with a primary gauze already positioned. For diffusive sampling, the primary gauze plays a critical role as it allows the surface area of sorbent to be open to the sampling environment, enabling direct interaction with the compounds of interest. Used in conjunction with a diffusion cap, the essential 15 mm air gap is set up and contamination resulting from particulates/debris entering the tube is prevented.
For active sampling of multi-bed tubes, gauzes are also used to separate sorbent beds. This allows discrete sorbent beds to be used, enabling suitable retention and release of compounds. The use of multi-bed tubes allows increased volatility ranges in a single sample/analytical run, simplifying the sampling of unknowns or for applications with broad analyte ranges.
Inert-coated sorbent-retaining gauzes are available to maintain the inert flow path when used with inert-coated thermal desorption tubes and Markes' automated analytical systems. Note: The final sorbent-retaining gauze (and gauze-retaining spring) do not need to be inert-coated because they are not in the flow path.
Part numbers:
C-GZ020 - C-GZ200 - C-GZ2000 - C-GZI10 - C-GZI100 - C-GZI20
