difference between split and splitless liner
Posted: Fri Sep 27, 2013 10:01 pm
by jiangds06
why we need to make two different types of liners?
Re: difference between split and splitless liner
Posted: Sat Sep 28, 2013 12:43 am
by Don_Hilton
You are doing two different kinds of things in the inlet.
In one you are trying to get everything you injected to transfer to the column in a narrow band with the time required to transfer material to the linlet taking long enough to transfer that volume of gas from the inlet at the flow rate of the column. Mixing in the inlet makes the transfer longer. (splitless)
With the other you are sampling from a fast moving stream of gas as most of it heads for the split vent. You need adequate mixing so that you get a good sample from that gas. Time is not as much of an issue because with the gas flow going out the split vent, the inlet is quickly cleared of sample. (split).
Re: difference between split and splitless liner
Posted: Mon Sep 30, 2013 3:01 pm
by jiangds06
So we want better mixing derived from geometry of liner in splitless mode, right? That is the basis for design of different inlet liner for different injection modes.
You are doing two different kinds of things in the inlet.
In one you are trying to get everything you injected to transfer to the column in a narrow band with the time required to transfer material to the linlet taking long enough to transfer that volume of gas from the inlet at the flow rate of the column. Mixing in the inlet makes the transfer longer. (splitless)
With the other you are sampling from a fast moving stream of gas as most of it heads for the split vent. You need adequate mixing so that you get a good sample from that gas. Time is not as much of an issue because with the gas flow going out the split vent, the inlet is quickly cleared of sample. (split).