Sodium Sulphate unhydrous in GC

[Sitaram Barhate]

What is the purpose of using Sodium Sulphate unhydrous in sample preparation along with water for test of Residual solvents by GC

[zokitano]

The things that comes to my mind right now, regarding your question are:

- The usage of Na2SO4 in gas chromatography, in tests for organic volatile residual solvents, is to bind the residual water from the matrix solvent used to prepare the standards/samples; and

- If used in headspace-GC, it will probably serve as "salting out" agent, in order to increase the mass transfer of (semi)volatile analytes from the liquid into the gas phase (witnin the headspace vial).

Regards