1.07203

Certified sec. standard reference buffer solution

di-sodium tetraborate decahydrate, directly traceable to primary SRM from NIST/PTB pH(S) = 9.18₀ (25°C) Certipur^®

• Synonym(s): di-sodium tetraborate decahydrate buffer solution, pH 9.2 Certified Secondary Buffer Solution
• UNSPSC Code: 41116107
• NACRES: NA.25

Properties

• grade: certified reference material
• Quality Level: 300
• Agency: complies with DIN 19266
• product line: Certipur^®
• pH: 9.2 (25 °C in H₂O)
• bp: 100 °C/1013 hPa
• density: 1.00 g/cm³ at 20 °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 (di-sodium tetraborate decahydrate) is gravimetrically prepared from high-quality sodium borate in high-purity water. Its pH value is measured by differential potentiometry with two platinum hydrogen electrodes against primary certified reference materials from NIST & PTB. The pH is qualified using the 5-point calibration method, in accordance with 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 to calibrate, qualify, and monitor pH measuring instruments and as a control for testing other buffer solutions.

Features and Benefits

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

Analysis Note

pH-value: 9.180 - 9.186

Legal Information

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

Safety Information

• Storage Class Code: 12 - Non Combustible Liquids
• WGK: nwg
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable