Question

Why we kept volatile compounds at 40 degrees temperature in gcms?

Answer 1

Each components need different temperature to evaporate. Because of the reaction of the mobile phase and the constant phase , temperature must be increased slowly. The advantage of the ramp is that it provides a good reaction between the active and the constant phase. · 

Answer 2

Explanation:

Cryogenic Traps

Volatile compounds can be retained by condensation if the temperature of the trap is below the dew point for the compound. The trap can be an empty tube, a length of coated capillary column, or a packed tube containing a nonretaining material (e.g., glass beads). A nonretaining packing enhances condensation of volatile compounds while allowing rapid thermal desorption for their transfer to the column. Retaining materials afford higher trapping efficiency but slow desorption kinetics may result in poor chromatographic performance and low recovery of less volatile compounds.