Introduction of the industry first narrow range ACQUITY APC calibration standards specifically designed to match the molecular weight range of the ACQUITY APC columns. The APC Standards are available in polystyrene and polymethylmethacrylate configured into Low, Middle, and High Molecular Weight Calibration Kits, in addition to a convenient Method Development Kit which include the full separation range of all three kits combined. The standards are designed to provide a maximum range of narrow standard data points for specific column set or molar mass range