推荐产品
等级
certified reference material
质量水平
Agency
traceable to NIST
traceable to PTB
产品线
Certipur®
pH值(酸碱度)
4.01 (25 °C, phthalate)
7.00 (25 °C, phosphate)
9.00(borate)
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
It includes a pack of three certified buffer solutions, gravimetrically prepared using high-quality reagents and water at a registered calibration laboratory. Their pH values of 4.01 (phthalate), 7.00 (phosphate), and 9.00 (borate) at 25°C are measured using combined glass electrode as per the 5-point calibration method. The measurements are made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The pH of buffers is strongly dependent on the temperature and therefore a constant temperature must be maintained during their 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.
Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.
应用
They are used as standards to calibrate pH measuring instruments or pH electrodes and as controls to measure the pH of other solutions.
特点和优势
- Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
- Traceable to secondary reference standards from NIST and primary certified reference standards from PTB
- Ready-to-use solutions available in 30 mL sachets
- 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
- pH 4.00 and pH 6.99 buffer CRMs in the pack are accurate upto +/- 0.02 at 25 °C and the pH 9.00 buffer CRM is accurate upto +/-0.03 at 25 °C
法律信息
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
储存分类代码
10-13 - German Storage Class 10 to 13
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