| Metrology area, Sub-field | Chemistry and Biology, Electrochemistry |
| Description | Acidity function of an unknown phthalate buffer at zero chloride molality |
| Time of measurements | 2022 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Acidity function at at zero chloride molality, pa0 (pH) Nominal value of pH ~4.01 at temperature 25 °C |
| Parameters | Temperature: 15 °C, 25 °C and 37 °C, and optional at 5 °C and 50 °C |
| Transfer device | Aqueous phthalate buffer |
| Comparison type | Key Comparison |
| Consultative Committee | CCQM (Consultative Committee for Amount of Substance) |
| Conducted by | CCQM (Consultative Committee for Amount of Substance) |
| Comments | PTB has handed over the coordination to INMETRO |
| Pilot institute |
INMETRO
Instituto Nacional de Metrologia, Qualidade e Tecnologia Brazil |
| Contact person | Fabiano Gonzaga +55-21-26799134 |
| Pilot laboratory | |
|---|---|
| INMETRO |
Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM |
| BFKH |
Government Office of the Capital City Budapest, Hungary, EURAMET |
| BIM |
Bulgarian Institute of Metrology, Bulgaria, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| CMI |
Czech Metrology Institute, Czechia, EURAMET |
| IBMETRO |
Instituto Boliviano de Metrología, Bolivia, SIM |
| INTI |
Instituto Nacional de Tecnologia Industrial, Argentina, SIM |
| LATU |
Laboratorio Tecnologico del Uruguay, Uruguay, SIM |
| NIM |
National Institute of Metrology, China, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| SNSU-BSN |
National Measurement Standard - National Standardization Agency of Indonesia, Indonesia, APMP |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
| VNIIFTRI |
Institute of Physical Technical and Radiotechnical Measurements, Rosstandart, Russian Federation, COOMET |
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