Effect of Column Diameter on Flow
ID can vary from 0.245 to 0.255 for a typical 0.25 mm ID column. When the inlet pressure and length are held constant, the flow rate can change by 16%.
Column Efficiency is dependent on:
- Flow rate / linear velocity
- Column diameter
- Column length
- Carrier gas molecular weight
Efficiency and Column Diameter
- The smaller the diameter, the greater the efficiency
Decreasing column diameter results in:
- Faster run times for a given resolution
- Increased efficiency
- Decreased capacity
