| Metrology area, Sub-field | Chemistry and Biology, Electrochemistry |
| Description | pH measurement of a phosphate buffer solution |
| Time of measurements | 2000 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | pH 6.9 at 25 °C |
| Parameters | Temperature: 15 °C, 25 °C and 37 °C |
| Transfer device | CCQM-K9 Sample 1: 0.025 mol/kg of KH2PO4 and Na2HPO4 |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Comments | This is a subsequent bilateral comparison to CCQM-K9, carried out between SMU and PTB. Results are available from the CCQM-K9 results page. Results published in 2001 Determination of the pH of a phosphate buffer solution at three different temperatures |
| Pilot institute |
PTB
Physikalisch-Technische Bundesanstalt Germany |
| Contact person | P. Spitzer +49 (0) 531 592 3130 |
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