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1.09445

Buffer solution

Name: Buffer solution
Brand: MM

(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)

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About This Item

UNSPSC代码:

12161703

NACRES:

NA.25

等级

certified reference material

质量水平

300

产品线

Certipur^®

pH值（酸碱度）

4.0 (25 °C in H₂O)

密度

1.01 g/cm³ at 20 °C

应用

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

格式

mixture

储存温度

15-25°C

一般描述

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.

应用

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.

特点和优势

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

法律信息

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

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

储存分类代码

12 - Non Combustible Liquids

WGK

WGK 1

闪点(°F)

Not applicable

闪点(°C)

Not applicable

分析证书(COA)

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