199011

Buffer solution

(Potassium tetraoxalate) traceable to SRM from NIST and PTB pH 1.68 (25°C) Certipur^®

• Synonyme(s) : pH Buffering Solution
• Code UNSPSC : 41116107
• Nomenclature NACRES : NA.25

Propriétés

• Qualité: certified reference material
• Niveau de qualité: 300
• Gamme de produits: Certipur^®
• pH: 1.7 (25 °C in H₂O)
• Densité: 1.003 g/cm³ at 20 °C
• Application(s): environmental; food and beverages; general analytical; industrial qc; pharmaceutical
• Format: mixture
• Température de stockage: 15-25°C

Description

Description générale

The potassium tetraoxalate certified buffer solution is gravimetrically prepared using high-quality reagents and water at a registered calibration laboratory. Its pH value of 1.68 at 25°C is measured using a combined glass electrode following a 5-point calibration method. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The buffer′s pH value depends on the temperature and therefore a constant temperature must be maintained during its use.

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.

Informations légales

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

Informations sur la sécurité

• Code de la classe de stockage: 12 - Non Combustible Liquids
• Classe de danger pour l'eau (WGK): nwg
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable