Buffer solution

产品说明

一般描述

It is a certified buffer solution of citric acid/sodium hydroxide/hydrogen chloride, gravimetrically prepared using high-quality reagents at a registered calibration laboratory. It has a pH value of 2.00 at 25℃, measured using a combined glass electrode following a 5-point calibration method. The measurement is made in accordance with DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The pH value of the buffer solution depends on the temperature and therefore a constant temperature must be maintained during its use.

应用

The buffer solution is used as a standard in analytical procedures for the calibration of pH measuring instruments or pH electrodes and as a control for the measurement of pH of other solutions.

特点和优势

• Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
• Directly traceable to secondary reference standards from NIST and primary certified reference materials from PTB
• Ready-to-use solution available in 30 mL sachets
• Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective quality management system
• Product label follows the ISO Guide 31 and contains information about ordering number, article description, lot number, safety data, and expiry date
• Packaging material subjected to comprehensive stability studies as per ISO Guide 35
• An uncertainty of +/- 0.02 in the pH value at 25℃

法律信息

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

产品性质

安全信息