Valco Instruments”Cheminert Nanovolume HPLC (High Performance Liquid Chromatography)injectors and switching valves facilitate high-resolution HPLC in asmall scale. The 100µm (.004″) bore is uniform throughout the flowpath,reducing band broadening and creating less than 25 nl of port-to-portvolume. New individual fingertight fittings work with a variety oftubing, including PEEK, fused silica (360 µm), and 1/32″ electroformednickel. A fast (100 msec) microelectric actuator determinesaccurate positioning without limit switches or customer adjustment.Computer control is facilitated via RS-232 or RS-485 interface.