All about quality of measurements

Provides a comprehensive resource on sample preparation and analysis for those interested in elemental determinations by atomic spectrometry, especially ICP-OES and ICP-MS. Issue such as sources of contamination, detection limits, sample preparation, standard stability, and method validation are well covered.

a network of organisations in Europe having the objective of establishing a system for the international traceability of chemical measurements and the promotion of good quality practices. Eurachem has published a range of guides on quality and accreditation issues in analytical measurement. All Guides are currently available free of charge from the Eurachem Website.

A web site dedicated to information on "Guide to the Expression of Uncertainty in Measurement".

Integrity Solutions Group has prepared various analyses and presentations to establish an integrated means to assure technically correct, integrated, and cost-effective Measurement Uncertainty Estimates. A useful tool is a computerized calculation program

This is a brief summary of the method of evaluating and expressing uncertainty in measurement adopted widely by U.S. industry, companies in other countries, NIST, its sister national metrology institutes throughout the world, and many organizations worldwide.

This sides provides a quality assurance training resource as well as documents related to the quality of measurements.

Members of the CITAC/Eurachem measurement uncertainty working group support the utilization of the completely revised Guide Quantifying Uncertainty in Analytical Measurements. Their web site has a forum with an uncertainty discussion thread.

API offers PT programs for labs performing microbiology and chemistry analyses on food products and clinical labs.

A searchable database of PT schemes available worldwide

The independent iis Institute organises global interlaboratory studies on fuels, petroleum products, petrochemicals and consumer products.

LGC Standards is a UKAS accredited international provider of proficiency testing (PT) services wit respect to to laboratories undertaking chemical, microbiological and physical measurements including trials.

The North American Proficiency Testing (NAPT) Program (a program of the Soil Science Society of America) assists soil, plant and water testing laboratories in their performance through inter-laboratory sample exchanges and a statistical evaluation of the analytical data.