I am currently using an Agilent GC-MS system and the vendor attached a restrictor column to the system along with the analytical column.

I dont know a lot of restrictor column, I think it is for post column backflush. I am not sure the optimum parameters (flow, pressure, post run) for the restrictor and the analytical column and what impact they would have on each other.

If you have used a restrictor column along with an analytical column please help me out.