Analysis Note

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

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

General description

The certified secondary standard reference buffer solution of potassium dihydrogen phosphate/di-sodium 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.

Legal Information

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