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 and expiry date.

Barium standard may be used for the determination of barium ions in drinking water and sediments using carbon furnace atomic absorption spectrometry.

1000mg/L Ba 溶于 2% 硝酸，
用高纯度 BaCO₃、HNO₃ 以及 水制备。

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

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