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An industrial hygiene calibration manifold
American Industrial Hygiene Association Journal
|December 1, 1977
Summary
This industrial hygiene calibration manifold generates stable vapor samples for calibrating equipment. It uses gravimetric determination and volumetric flow measurement for accurate industrial hygiene analyses.
Area of Science:
- Industrial Hygiene
- Analytical Chemistry
- Environmental Science
Background:
- Accurate calibration of industrial hygiene instruments is crucial for worker safety.
- Existing methods for generating vapor samples can lack stability and reproducibility.
- A need exists for a reliable system to produce dynamic and reproducible vapor concentrations.
Purpose of the Study:
- To develop and describe an industrial hygiene calibration manifold.
- To provide a continuous, stable, and reproducible vapor sample source.
- To enable validation and calibration of various industrial hygiene analyses.
Main Methods:
- Utilizes gravimetric determination of diffusion/permeation rates.
- Incorporates measurement of total volumetric flow.
- Employs components like an organic-free air system, diffusion-permeation chamber, and mixing manifold.
Main Results:
- The manifold produces vapor samples in the fractional to thousands of parts per million range.
- Ensures continuous, stable, and reproducible vapor generation.
- Demonstrates applicability for diverse industrial hygiene techniques.
Conclusions:
- The developed manifold offers a robust solution for calibrating industrial hygiene equipment.
- It enhances the accuracy and reliability of air sampling and analysis.
- The system supports validation of methods like detector tubes and impinger techniques.