磷酸二氢钾 溶液

The accuracy of pH measurement results is directly affected by the buffer reference materials used in calibration. Merck offers you a distinguished range of buffer solutions and substances for the exact calibration of your pH measurement equipment. Using Certipur^® reference materials, you benefit from maximum accuracy, reliability and convenience and avoid costly repeat analyses. For your strictest demands in equipment calibration and monitoring, we provide certified secondary standard buffer solutions and substances offering the highest precision.

Our wide range of pH calibration buffers offers ideal products and packaging for your individual need. All buffer solutions are certified reference materials according to ISO 17034 and qualified in our DIN EN ISO/IEC 17025 accredited laboratory. They are all traceable to NIST (National Institute of Standards and Technology, USA) and PTB (Physical Technical Institute, Germany) primary reference materials. Buffers solutions are offered in plastic bottles, measured at 20 °C or 25 °C.

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.

Potassium dihydrogen phosphate, a monophosphate, is a certified reference buffer solution (CRM) used as a pH buffering agent, typically in combination with dipotassium phosphate.

concentration: 0.0664 - 0.0670 mol/l

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