1.09477

Buffer solution

(di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour: green traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur^®

• 別名: Buffer solution coloured:green (di-sodium hydrogen phosphate/potassium dihydrogen phosphate)
• UNSPSCコード: 12161706
• NACRES: NA.25

特性

• グレード: certified reference material
• 品質水準: 300
• 製品種目: Certipur^®
• pH: 7.0 (20 °C in H₂O)
• 密度: 1.00 g/cm³ at 20 °C
• アプリケーション: environmental; food and beverages; general analytical; industrial qc; pharmaceutical
• フォーマット: mixture
• 保管温度: 15-25°C

詳細

詳細

The green-colored di-sodium hydrogen phosphate/potassium dihydrogen phosphate buffer solution is gravimetrically prepared using high-quality reagents at a registered calibration laboratory. Its pH value of 7.00 at 20°C is measured following a 5-point calibration method, using a combined glass electrode. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. Its pH value is strongly dependent on the temperature 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.

アプリケーション

The buffer solution is meant to be used as a calibration standard for pH measuring instruments or pH electrodes and as a control for measuring the pH value of solutions.

特徴および利点

• Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
• Directly traceable to secondary reference standard from NIST and primary certified reference standard from PTB
• Ready-to-use solution
• Available in a sealed plastic bottle to prevent 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 35

法的情報

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