1.70244

Tungsten standard solution

traceable to SRM from NIST (NH₄)₂WO₄ in H₂O 1000 mg/l W Certipur^®

• NACRES: NA.24
• UNSPSC Code: 41116107

Properties

• grade: certified reference material
• Quality Segment: 300
• product line: Certipur^®
• concentration: 1000 mg/L W in water
• technique(s): AAS: suitable
• pH: 6 (20 °C in H₂O)
• density: 1.00 g/cm³ at 20 °C
• application(s): industrial qc; pharmaceutical
• format: single component solution
• storage temp.: 15-25°C

Description

General description

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.

Application

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

Analysis Note

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

Other Notes

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

Legal Information

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

Safety Information

• Storage Class: 12 - Non Combustible Liquids
• wgk: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable