Certified pH Reference Standards

When it comes to calibration and controls, it is important to make sure that the standards you use have been certified. Each of our pH standards have been manufactured to be compatible with your instrumentation and to meet all requirements for calibration as a true Certified Reference Material. Supplying products from Inorganic Ventures, Macherey Nagel, NSI Lab Solutions and SPEX, we stand by the quality and consistency of our vendors.

Each standard is traceable to a NIST SRM and engineered to ensure homogeneity and has undergone both long-term and short-term stability testing. ISO 9001 registered and manufactured under ISO 17025 and ISO 17034 accreditations, each certified pH standard comes with a Certificate of Analysis which includes a with a temperature chart for your convenience. Detailed error budgets on the CoA provide accurate and consistent certified values and uncertainties.

Browse our selection of Certified pH Reference Standards below. Available in a range of volumes, we offer a selection of Buffer Standards and Calibration Standards, as well as colour pH standards. Filter our products by Vendor, Volume, pH Value, Gradation and more to ease your search for the perfect solution.

NEW! We now stock pH Buffers specially formulated for USP <791>!

For analysts in the pharmaceutical industry tasked with maintaining proper pH meter calibration in accordance with USP <791>, Inorganic Ventures’ CRMs deliver confidence, control, and support.
Our pH buffers are NIST-traceable and manufactured and tested under ISO 17034 and ISO 17025 guidelines. Each standard is accompanied by a detailed Certificate of Analysis (CoA), displaying certified values for multiple temperatures. In addition, these solutions are formulated to meet USP <791> specifications* and are ready to use right out of the bottle.

pH Buffer Features:

  • NIST-traceable standards, certified within 5% of the nominal values and associated uncertainties of no more than 0.05 pH units.
  • Packaged in Transpiration Control Technology (TCT) which guarantees scientific integrity for up to 5-years from the date of manufacture.
  • Ready to use with no preparation required