pH Standard, IUPAC, pH6.865 at 25 °C, Certified, 500 mL (Radiometer Analytical)

Each bottle (500 mL) is supplied with a COFRAC Verification Certificate and Certificate of Conformity and Traceability drawn up according to ISO31.

• Total Control of the traceability chain and calculated uncertainties
• Direct traceability to primary standards and the reference method
• The competence and integrity of a laboratory internationally recognized to be accredited for the measurement of pH and conductivity reference materials