Single-Element Standards for AA & ICP • Made with acid and ASTM Type I Water • Inorganic compounds and metals at 99.99% to 99.9999% purity (where commercially available) • Directly traceable to NIST (where applicable) • Accredited by A2LA to ISO/IEC 17025:2017 and ISO 17034:2016 AA & ICP Assurance® Grade CRMs are designed for AA and ICP and are available in single and multi-element formulations. 70 elements are available as single-element standards and are available at 1,000 µg/mL and/or 10,000 µg/mL. They are packaged in 30 mL, 125 mL, 250 mL, and 500 mL bottles to minimize contamination. Custom standards can be manufactured upon request.