Restek recommends a 4 mm ID Restek Premium single taper liner with wool (cat.# 23303) for splitless injections and a 4 mm ID Restek Premium Precision liner with wool (cat.# 23305) for split injections. The thoroughly deactivated Restek Premium wool provides excellent sample homogenization during either splitless or split injection, which increases repeatability and accuracy. In addition, wool keeps liquid sample from being deposited on the inlet seal, where contact with hot metal can degrade thermally sensitive compounds, or where less volatile, higher molecular weight compounds of interest can be lost. Wool also protects the GC column from non-volatile sample “dirt”, preserving the column’s chromatographic performance, especially for difficult to analyze compounds.
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