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ALASCA proficiency testing scheme for occupational hygiene laboratories
Eddy Langlois1, Alain Boulet, Edmond Kauffer
1Institut National de Recherche et de Sécurité, 50 av de Bourgogne, BP27 54501, Vandoeuvre Cedex, France.
Journal of Environmental Monitoring : JEM
|November 28, 2008
Summary
Proficiency testing schemes (PTS) are crucial for analytical laboratories to ensure quality. This study details a robust PTS for industrial hygiene, enhancing performance assessment through unique methods and a computerized system.
Area of Science:
- Analytical Chemistry
- Environmental Science
- Laboratory Quality Assurance
Background:
- Quality assurance is vital for analytical laboratories performing routine and R&D analyses.
- Proficiency testing schemes (PTS) are powerful tools for evaluating analytical bias and dispersion.
- In industrial hygiene, analytical uncertainty may be underestimated relative to sampling uncertainty.
Purpose of the Study:
- To present a comprehensive overview of a proficiency testing scheme (PTS) organized by INRS's 'Métrologie des Polluants' department since 2002.
- To highlight the unique features and strengths of the scheme in providing reliable performance assessments for analytical laboratories.
- To detail the technical and organizational aspects that contribute to the scheme's effectiveness.
Main Methods:
- Determination of assigned values using a method independent of the analytical techniques being tested.
- Development of novel tools for sample preparation and fabrication.
- Application of a robust statistical model based on the WASP HSL scheme.
- Implementation of a fully computerized system for data management and reporting.
- Utilization of a secure website for participant result submission.
Main Results:
- The scheme provides a reliable performance assessment for participating laboratories.
- Original tools and methods ensure the integrity of sample preparation and assigned value determination.
- A strong statistical model effectively visualizes participant performance in terms of bias and dispersion.
- A computerized system streamlines all aspects of the proficiency testing process, from database management to report generation.
Conclusions:
- The described proficiency testing scheme offers a reliable and advanced method for assessing laboratory performance in industrial hygiene analysis.
- The integration of independent value assignment, innovative sample preparation, robust statistics, and a computerized system represents a significant advancement in quality assurance.
- The scheme's features, including participant communication and secure online submission, enhance its overall effectiveness and user experience.
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