Aijiren series HPLC - Gemini BV The low internal volume of the HP Aijiren of 300 µL ensures a minimal contribution to the total internal volume of a system. The system uses overlapping injections for increased productivity with sample capacities of 100 × 2 ml vials in a standard tray, 40 × 2 ml vials in a standard tray or 15 × 6 ml vials in a half-tray.