1.07205

Certified sec. standard reference buffer solution

potassium dihydrogen phosphate/di-sodium hydrogen phosphate, pH 7.41 (25 °C), Certipur^®

• UNSPSC Code: 41116107

Properties

• grade: certified reference material
• Quality Level: 300
• agency: complies with DIN 19266
• product line: Certipur^®
• composition: potassium dihydrogen phosphate/di-sodium hydrogen phosphate
• pH: 7.41 (25 °C)
• application(s): environmental; food and beverages; general analytical; industrial qc; pharmaceutical
• format: mixture
• storage temp.: 15-25°C

Description

General description

The certified secondary standard reference buffer solution of potassium dihydrogen phosphate/disodium hydrogen phosphate is gravimetrically prepared using high-quality reagents in high-purity water. Its pH value is analyzed by differential potentiometry with two platinum hydrogen electrodes against primary certified reference materials from NIST & PTB. Also, the pH analysis uses the 5-point calibration method, following DIN 19268, against certified primary reference standards as per DIN 19266.

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

The buffer solution can be used for the calibration, qualification, and monitoring of pH measuring instruments and as a control for testing other buffer solutions.

Features and Benefits

• Available in solution format in a secure 100 mL high-density plastic bottle
• Subjected to detailed stability studies as per ISO Guide 35
• Product label having relevant information on order number, article description, lot number, expiry date and safety data, in accordance with ISO Guide 31
• Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective quality management system
• Measured and qualified in ISO/IEC 17025 and ISO 17034 accredited laboratory
• Traceable to SRMs from NIST and primary certified reference standards from PTB

Analysis Note

pH-value: 7.414 - 7.420
For complete data see the enclosed certificate

Legal Information

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

Safety Information

• Storage Class: 12 - Non Combustible Liquids
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable