This certified reference material (CRM) is produced in accordance with ISO 17034 and characterized in accordance with ISO/IEC 17025. This CRM is traceable to SI unit kg and measured against primary material from a National Metrology Institute (NMI), e.g. NIST.
Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.
Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty, date of expiry, and detailed information about trace impurities.

Chromium ICP standard can be used as a calibration standard in the determination of chromium in contaminated water by inductively coupled plasma optical emission spectroscopy (ICP-OES).

10000 mg/L Cr in 2-3% nitric acid, preparedwith high-purity Cr(NO₃)₃, HNO₃, and water

For a complete product listing of our Certipur^® range of CRMs for ICP and AAS, technical information, and example certificates please visit our ICP & AAS standards website

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany