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CCQM-K9
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CCQM-K9
Information
Metrology area, branch   Amount of Substance, Electrochemistry
Description   pH measurement of phosphate buffer solutions
Time of measurement   1999 - 2000
Status   Approved for equivalence, Results available
Reference(s)   CCQM-K9 Final Report, 2001, 39 pages
Measurand   pH 6.9 at 25 °C
Parameter(s)   15 °C, 25 °C and 37 °C plus 7 other temperatures
Transfer device(s)   Sample 1: 0.025 mol/kg of KH2PO4 and Na2HPO4
Sample 2: 0.02 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   A subsequent bilateral comparison was carried out between SMU and PTB.