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Published on: August 3, 2016
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Proficiency testing of sampling.
Summary
Proficiency testing is crucial for analytical lab accreditation and identifying uncertainty sources. This study highlights the need for general guidelines for sampling proficiency tests, acknowledging sector-specific constraints.
Area of Science:
- Analytical Chemistry
- Metrology
- Laboratory Science
Background:
- Proficiency testing (PT) is mandatory for analytical laboratory accreditation.
- PT helps identify unexpected sources of uncertainty in laboratory analysis.
- Both sampling and analysis contribute to overall measurement uncertainty.
Purpose of the Study:
- To emphasize the importance of proficiency testing for sampling.
- To address the need for general guidelines for sampling PT.
- To acknowledge the variations in sampling PT across different sectors.
Main Methods:
- The study reviews existing feasibility studies and schemes for sampling PT.
- It considers the constraints and variations in sampling procedures across different application sectors.
- The need for generalized guidance is identified through analysis of current practices.
Main Results:
- Sampling uncertainty stems from target material heterogeneity and variations in sample extraction.
- Different samplers can introduce variability even with standardized protocols.
- Existing sampling PT initiatives show promise but face sector-specific challenges.
Conclusions:
- Proficiency testing for sampling is essential for improving analytical data reliability.
- Developing general guidelines for sampling PT is necessary.
- Addressing sector-specific constraints is key to implementing effective sampling PT schemes.
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