Reagecon’s Multi Element Linearity Standard for Flame Photometry is manufactured from ultra-pure salts and is tested by an ISO17025 Accredited Test Method (INAB Ref. 264T). 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 FAAS and it is certified using the gravimetric result, to a specification of ± 0.5% for each cation. The certified results are reported and certified in mg/l on the basis of weight. 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 -196 to +1200°C (INAB Ref. 265C).