1.09445

Buffer solution

(citric acid/sodium hydroxide/hydrogen chloride) traceable to SRM from NIST and PTB pH 4.00 (25°C) Certipur^®

• 别名: Buffer solution pH 4.00 (25°C) (citric acid/sodium hydroxide/hydrogen chloride)
• 分類程式碼代碼: 12161703
• NACRES: NA.25

属性

• 等級: certified reference material
• 品質等級: 300
• 產品線: Certipur^®
• pH值: 4.0 (25 °C in H₂O)
• 密度: 1.01 g/cm³ at 20 °C
• 應用: environmental; food and beverages; general analytical; industrial qc; pharmaceutical
• 格式: mixture
• 儲存溫度: 15-25°C

说明

一般說明

The certified buffer solution (citric acid/sodium hydroxide/hydrogen chloride) is gravimetrically prepared using high-quality reagents, as per DIN EN ISO/IEC 17025. Its pH value of 4.00 at 25°C is calculated 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. 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.

應用

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

特點和優勢

• 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
• Ready-to-use solution
• Available in a sealed plastic bottle and sustainable Titripac^® packaging for a reduced waste generation
• 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

法律資訊

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

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

安全信息

• 儲存類別代碼: 12 - Non Combustible Liquids
• 水污染物質分類（WGK）: WGK 1
• 閃點（°F）: Not applicable
• 閃點（°C）: Not applicable