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12. Measurands in Laboratory Medicine

Dr. Denis Grote-Koska

The Technical Committee “Measurands in Laboratory Medicine“ currently comprises four accredited laboratories that offer a total of approximately 35 different measurands. The laboratories represented in the Technical Committee are also integrated into the global system “Joint Committee for Traceability in Laboratory Medicine (JCTLM)“ which was founded by the International Bureau of Weights and Measures (BIPM), the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) and the International Laboratory Accreditation Cooperation (ILAC). The task of the JCTLM (http://www.bipm.org/jctlm) is the regular listing of

  • calibration/reference materials,
  • calibration/reference measurement procedures,
  • calibration/reference laboratories with their respective measurands

Prerequisites for the listing of calibration and reference laboratories services by the JCTLM are

  • the application of a calibration/reference method accepted (listed) by the JCTLM,
  • the accreditation as calibration laboratory according to DIN EN ISO/ IEC 17025 and DIN EN ISO 15195,
  • the regular participation in interlaboratory comparisons for reference/calibration laboratories

A corresponding proficiency testing system (RELA) was introduced as a project of the IFFC by the Reference Institute for Bioanalytics (Bonn) in 2002. The results of all laboratories, as well as their identity, are published once a year on the Internet (http://www.dgkl-rfb.de:81). Approximately 50 internationally spread laboratories regularly participate in these ring trials.

The JCTLM-recognized calibration and reference materials and measurement procedures serve as a basis for the accreditation by the DAkkS.

The evaluation of the comparison measurements within the scope of the accreditation is carried out using the results presentation of the RELA ring trials. The German reference and calibration laboratories as well as the PTB regularly participate in these ring trials.