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Certified pH and conductivity standard solutions

Download the documentation
(PDF* format, 674 Ko)

- Download the DKD accreditation certificate
(PDF* format, 450 Ko)


For laboratories involved in accreditation or certification, the use of certified and accredited standard solutions traceable to their national standards is highly recommended.

Radiometer Analytical is part of the Hach Lange group and their Calibration Laboratory, located in Berlin, is accredited for the calibration of certified pH and conductivity standards by DKD, the German national accreditation authority. This accreditation (No. DKD-K-47901) is recognised in more than 35 countries.

All standards are formulated in compliance with NIST, IUPAC and DIN19266 specifications.

IUPAC Series certified pH standards are fully traceable to the Standard Hydrogen Electrode through
Certified Reference Material produced by the Primary Laboratory of either NIST or DFM.

Radiometer Analytical certified conductivity standards are fully traceable to SI units via Certified Reference Materials manufactured by NIST. They are prepared and calibrated according to the internationally recognised demal scale laid down by the International Organisation of Legal Metrology (OIML – Recommendation No. 56).

All of our certified standards solutions come in sealed containers guaranteeing pH or conductivity values for a full two or four years, and are delivered with a DKD Calibration Certificate and a Certificate of Conformity and Traceability drawn up according to ISO Guide 31.
Glossary:

IUPAC: International Union of Pure and Applied Chemistry
DKD: Deutscher Kalibrierdienst
OIML: Organisation Internationale de la Métrologie Légale


IUPAC Series certified pH standard solutions

Type Value Tolerance Qty Part No
pH1.679 pH 1.679 ±0.010 at 25°C 500 ml S11M001
pH4.005 pH 4.005 ±0.010 at 25°C 500 ml S11M002
pH6.865 pH 6.865 ±0.010 at 25°C 500 ml S11M003
pH7.000 pH 7.000 ±0.010 at 25°C 500 ml S11M004
pH7.413 pH 7.413 ±0.010 at 25°C 500 ml S11M005
pH9.180 pH 9.180 ±0.010 at 25°C 500 ml S11M006
pH10.012 pH 10.012 ±0.010 at 25°C 500 ml S11M007
pH12.45 pH 12.45 ±0.05 at 25°C 500 ml S11M008


OIML Series certified conductivity standard solutions**

Type Value Tolerance Qty Part No
KCl 1 D 111.3 mS/cm ±0.5% at 25°C 500 ml S51M001
KCl 0.1 D 12.85 mS/cm ±0.35% at 25°C 500 ml S51M002
KCl 0.01 D 1408 µS/cm ±0.5% at 25°C 500 ml S51M003
NaCl 0.05% 1015µS/cm ±0.5% at 25°C 500 ml S51M004

**These standards are formulated in compliance with Recommendation No. 56 issued by the "Organisation Internationale de Métrologie Légale" and their values relate to the internationally recognised demal (D) scale, established by the OIML.

 


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