In ion chromatography, a basic solution is often used as the mobile phase. The buffer capacity of such solutions is small, so the pH of the solution can easily be affected by the carbon dioxide in the air.
Increase the stability and reproducibility of your analysis by using a bottle in combination with a VICI cap and a carbon dioxide filter to prevent any change in the pH of the mobile phase. In this application, the CO2 filter also functions as an air inlet valve.
|O-ring||EPDM (not a wetted part)|
More information about the chemical resistance of these materials: Chemical Resistance