Restek, 10555, Rtx-50 GC Capillary Column, 30 m, 0.53 mm ID, 1.00 µm

The Restek Rtx-50 capillary GC column uses a midpolarity crossbonded methylphenyl polysiloxane stationary phase for separating compounds with different volatility and aromatic or polar interactions. Its dimensions are 30 m length, 0.53 mm internal diameter and 1.00 µm film thickness. This wide-bore configuration supports suitable GC methods for compound classes including pesticides, herbicides, phthalate esters and triglycerides, provided the inlet, carrier-gas flow and detector are configured for the method. Rtx-50 selectivity differs from nonpolar Rtx-1-type phases and highly polar polyethylene glycol phases; method transfer should therefore be qualified through retention, resolution and peak-shape checks. Select an inlet liner and connection hardware matched to the column's outside diameter, condition with clean carrier gas, and respect the stated temperature limits. The manufacturer's exact specification gives 40 °C as the lower limit and 260/280 °C as upper operating limits, depending on operating mode. Avoid contaminant-heavy injections that can shorten stationary-phase life.