The PL-XTR is an advanced sample handling system that is designed to be interfaced with any GPC system. A two arm robot performs sample dilution and injection from ambient up to 220 °C. Sample filled vials are loaded into 48 capacity blocks in an X-Y array. The robotic arm dispenses a defined volume of solvent into the vials, which are then subjected to controlled heating and optional stirring for a programmed dissolution time. Once dissolution is complete, the solution is delivered to the GPC chromatograph via an on-board heated injection valve and compact heated transfer line.

The injection system incorporates heated needle assemblies that can be rinsed to avoid cross contamination of samples. A zoom in on the baseline of two consecutive injections of polystyrene standards shows absolutely no evidence of carry over from one injection to the next.