Deliver milliliter injection volumes while minimizing backpressure contributions. The Thermo Scientific™ UltiMate™ 3000 semi-preparative Autosampler performs reliable, accurate and precise large-volume injections for purifying compounds in the microgram to lower milligram range. The in-line, split-loop injection principle and external needle wash options virtually eliminate carryover. Larger diameter capillaries optimize the entire system for higher flow rates (up to 50mL/min.) and lower backpressures.