产品说明
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℃ 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.
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 ℃ and the pH 9.00 buffer CRM is accurate upto +/-0.03 at 25 ℃
法律信息
CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
产品性质
| 质量水平 | 300 |
| 等级 | certified reference material |
| agency | traceable to NIST traceable to PTB |
| 产品线 | Certipur® |
| pH值(酸碱度) | 4.01 (25 ℃, phthalate) 7.00 (25 ℃, phosphate) 9.00(borate) |
| application(s) | environmental food and beverages general analytical industrial qc pharmaceutical |
| 格式 | mixture |
| 储存温度 | 15-25℃ |
安全信息
| 储存分类代码 | 10-13 - German Storage Class 10 to 13 |
