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 https://www.sigma-aldrich.com to view certified values, including uncertainty, date of expiry, and detailed information about trace impurities.

The chromium standard can be used to prepare calibration solutions for accurate quantification of chromium levels in biological samples, such as whole blood.

溶于 2% 硝酸的 1000mg/L 的 Cr 溶液，用高纯 (NH₄)₂Cr₂O₇、HNO₃ 和 水制备

For a complete product listing of our ICP and AAS range, including technical information and example certificates, please visit ICP & AAS standards website.

Detailed information on our complete workflow solutions for ICP-AAS can be found in our Brochure: High-Purity Chemicals for Inorganic Trace Analysis.

In our effort to be more sustainable, we′re going digital with COAs-download them directly from our website.

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