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Related Experiment Videos

Improved traceability of pH measurements.

P Spitzer1, R Eberhardt, I Schmidt

  • 1Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, D-38116, Braunschweig, Germany.

Analytical and Bioanalytical Chemistry
|September 1, 1996
PubMed
Summary

Ensuring traceable pH measurements is crucial for accurate laboratory and industrial results. A new primary standard device establishes traceable pH reference materials, improving measurement comparability and uniformity.

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Area of Science:

  • Analytical Chemistry
  • Metrology

Background:

  • Traceability is essential for consistent and comparable measurements in science and industry.
  • Current methods for pH measurement traceability face limitations, impacting accuracy.
  • Accurate calibration of pH meters relies on precise standard buffer solutions.

Purpose of the Study:

  • To address the challenges in achieving traceable pH measurements.
  • To introduce a novel primary standard measurement device for pH.
  • To establish a reliable method for certifying primary and secondary pH reference materials.

Main Methods:

  • Development and utilization of a new primary standard measurement device for pH.
  • Certification of primary pH reference materials using the new device.
  • Derivation of secondary reference materials from certified primary materials.

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Main Results:

  • Successful certification of primary pH reference materials.
  • Establishment of a traceable chain for pH measurements.
  • Demonstration of improved accuracy and comparability in pH measurements.

Conclusions:

  • The new primary standard measurement device effectively enhances pH measurement traceability.
  • The certified reference materials facilitate more accurate and uniform pH measurements.
  • This advancement is critical for laboratory and industrial applications requiring precise pH determination.