pH Certified Reference Standards

Each pH standard is manufactured to be compatible with your instrumentation and meets all requirements for calibration by a true Certified Reference Material.

Each standard is traceable to a NIST SRM and engineered to homogeneity and long-term/short-term stability testing. Manufactured under our ISO 17025 and ISO 17034 accreditations and ISO 9001 registered, each pH certified standard comes with a CoA with a temperature chart for your convenience.

Detailed error budgets provide accurate and consistent certified values and uncertainties.


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