Rotary shear injector valve with displaced rotor grooves

A chromatography apparatus, comprising:

• a sample source;
• a solvent source having a higher operating pressure than an operating pressure of the sample source;
• a separation column;
• a sample loop;
• and
• an injector valve, comprising,
• a stator defining at least five fluidic ports in a seal surface of the stator in respective fluidic communication with the sample source, the solvent source, the separation column, a first end of the sample loop and a second end of the sample loop;
• and
• a rotor, having a seal surface that defines at least two grooves and contacts the seal surface of the stator, the rotor further defining at least two through-holes that extend from the seal surface of the rotor to a back surface of the rotor providing fluidic communication with either end of a conduit disposed adjacent to the back surface of the rotor,
• wherein the valve has a load state that disposes the sample loop in fluidic communication with the conduit adjacent to the back surface, one of the at least two grooves, and the sample source, and wherein the valve has an inject state that disposes the sample loop in fluidic communication with the solvent source and the separation column via the at least two grooves of the seal surface of the rotor.