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A modified impinger for personal sampling
American Industrial Hygiene Association Journal
|May 1, 1979
Summary
A modified impinger design offers improved spill-proof performance. While impaction efficiency is similar to standard devices for larger particles, capture efficiency can vary, with the modified version sometimes collecting more material.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Industrial Hygiene
Background:
- Standard midget impingers are widely used for air sampling.
- Spills during sample collection can compromise data integrity.
- Improvements in impinger design are crucial for reliable environmental monitoring.
Purpose of the Study:
- To evaluate the performance of a modified, spill-proof impinger.
- To compare the collection efficiency of the modified impinger against the standard midget impinger.
- To assess the impact of the modification on particle capture.
Main Methods:
- Laboratory and limited field studies were conducted.
- A modified impinger design was tested for spill-proof characteristics.
- Collection efficiency was compared between the modified and standard midget impingers for various particle sizes.
Main Results:
- The modified impinger demonstrated relatively spill-proof performance.
- Impaction efficiencies were identical for particles >0.8 micrometer equivalent aerodynamic diameter.
- Capture efficiencies varied; the modified impinger collected more material in 3/6 tests, and was equivalent in the other 3.
Conclusions:
- The modified impinger offers a more robust solution for air sampling, reducing spill risks.
- While effective for larger particles, capture efficiency differences warrant further investigation for specific applications.
- This modified device shows potential for enhanced reliability in environmental and occupational exposure assessments.