Single-point Calibration Set A for Sievers 500 RL TOC Analyzer with Super iOS. Set includes: (1) Reagent Water Blank, (1) 1.5 mg C/L TOC Standard (as KHP) and (1) 25 µS/cm Conductivity Standard (as HCl). These standards are packaged in a vial set cartridge for use with the Sievers Super iOS System.