钨ICP标准液

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, date of expiry, and detailed information about trace impurities.

Tungsten Standard for ICP has been used as a standard stock solution in the determination of tungsten concentration in bulk drugs and intermediates using high performance liquid chromatography combined with inductively coupled plasma mass spectrometry method (HPLC-ICP-MS).

1 g/L W in 5% nitric acid and 2% hydrofluoric acid, prepared with high purity W metal, HNO₃, HF, and water

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