A metrological background for implementation of proficiency testing (PT) schemes for a
limited number of participating laboratories (fewer than 30) is discussed. Such schemes …

A metrological background for the selection and use of proficiency testing (PT) schemes for
a limited number N of laboratories-participants (less than 20–30) is discussed. The following …

3.2 Organization 3.3 Test Materials 3.4 Frequency of Test Sample Distribution 3.5
Establishing the Assigned Result 3.6 Choice of Analytical Method 3.7 Assessment of …

Proficiency testing (PT) is an essential tool to assess the competency of analytical
laboratories. Proficiency testing involves the regular circulation of test materials for analysis …

THE INTERNATIONAL HARMONIZED PROTOCOL FOR THE PROFICIENCY TESTING OF (CHEMICAL)
ANALYTICAL LABORATORIES Page 1 Pure&App/. Chern.,Vol. 65, No. 9, pp. 2123-2144,1993 …

An overview is presented of the changes in, and rationale of, the 2006 IUPAC Harmonised
Protocol for Proficiency Testing in Analytical Chemistry Laboratories. Much experience has …

The international standardizing organizations-International, ISO, and IUPAC-cooperated to
produce the International Harmonized Protocol for the Proficiency Testing of (Chemical) …

The use of reference materials (RMs) and the regular participation in proficiency testing (PT)
schemes have become fundamental pillars of assuring and controlling the quality of …

Proficiency testing is becoming an integral feature of laboratory accreditation, which itself is
now being advocated as a result of the development of the European Community …

ISO/IEC 17025 requires that testing laboratories establish the traceability of their
measurements, preferably to the SI units of measurement. The responsibility for establishing …