Restek GC Column Selection Guide

Column Length and Isothermal Analysis

When using a 60-meter column in an isothermal analysis, resolution increases, but analysis time is approximately double that for a 30-meter column.

Sample Components:

phenol o-cresol 2,6-xylenol p-cresol m-cresol o-ethylphenol 2,4-xylenol

2,5-xylenol 2,3-xylenol p-ethylphenol m-ethylphenol 3,5-xylenol 3,4-xylenol

30m, 0.25mm ID, 0.25µm DIIDP phase

60m, 0.25mm ID, 0.25µm DIIDP phase

Restek GC Column Selection Guide