Tungsten standard solution

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.

Tungsten standard solution can be used as a calibration standard for atomic absorption spectroscopy.

1000 mg/L W in water, prepared with high-purity (NH₄)₂WO₄ 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