1.99091

Buffer solution

traceable to NIST SRM, traceable to PTB, pH 9.2 (25 °C in H₂O), Certipur^®

• 동의어(들): di-sodium tetraborate
• UNSPSC 코드: 41116107
• NACRES: NA.25

속성

• Agency: traceable to NIST SRM; traceable to PTB
• Quality Level: 300
• 제품 라인: Certipur^®
• pH: 9.2 (25 °C in H₂O)
• bp: 100 °C/1013 hPa
• density: 1.00 g/cm³ at 20 °C
• 저장 온도: 15-25°C

설명

일반 설명

The di-sodium tetraborate buffer solution is gravimetrically prepared at a registered calibration laboratory with high-quality reagents and water. Its pH value of 9.20 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 pH is temperature dependent 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.

애플리케이션

The buffer is used as a standard to calibrate pH measuring instruments or pH electrodes and as a control to measure the pH of other solutions.

특징 및 장점

• Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
• Traceable to secondary reference standard from NIST and primary certified reference standard from PTB
• Available in secure 500 mL plastic bottle to protect against contamination
• Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective audit
• 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

법적 정보

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

안전성 정보

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