Reagecon’s Multi Element Cation Standard for Ion Chromatography (IC) in HNO₃ is manufactured from ultra-pure salts. The raw materials used in this standard are assayed by titration and ICP-MS prior to manufacture. Separate CRM’s are used to control or calibrate the titration and ICP-MS respectively. This product is manufactured gravimetrically. Prior to bottling, the final product is tested and verified using ICP-MS and IC. It is certified using the gravimetric result, corrected for density. The certified results are reported and certified in mg/kg and mg/l on the basis of weight and density. Reagecon hold ISO/IEC 17025 accreditation for calibration of laboratory balances (INAB Ref: 265C). All of the volumetric, titrimetric and gravimetric functions are carried out under a highly regulated temperature regime. Reagecon hold ISO/IEC 17025 for Temperature Calibration in the range of -90 °C to 650 °C (INAB Ref: 265C) and ISO/IEC 17025 Accreditation for density measurement using Oscillating U-Tube and Bingham Pycnometry Methods (INAB Ref: 264T).