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Monitoring methodology for gaseous hazards. Passive monitors and portable instruments
Scandinavian Journal of Work, Environment & Health
|April 1, 1983
Summary
This study evaluates personal monitoring techniques for workplace hazards. Passive monitors for organic solvents and carbon monoxide, along with a novel nitrogen dioxide sampler, were found to be viable monitoring methods under specific conditions.
Area of Science:
- Occupational Health and Safety
- Analytical Chemistry
- Environmental Monitoring
Background:
- Effective workplace hazard monitoring requires validated sampling and analytical procedures.
- Personal monitoring techniques are crucial for assessing individual exposure levels to chemical agents.
- Existing methods may have limitations in accuracy, precision, or applicability to various substances and conditions.
Purpose of the Study:
- To evaluate the performance of passive monitors for common organic solvent vapors.
- To assess the accuracy and precision of carbon monoxide dosimeters under diverse experimental conditions.
- To develop and validate a novel sampling method for nitrogen dioxide (NO2) detection.
Main Methods:
- Evaluation of three passive monitors for six organic solvents (toluene, trichloroethylene, n-hexane, acetone, methylene chloride, vinyl chloride) under varying environmental factors.
- Testing of two carbon monoxide (CO) dosimeters (Energetics Science series 9000, General Electric model 15ECS1CO2) for accuracy and precision.
- Development of a new NO2 sampling technique using Poroplastic film impregnated with an absorbing liquid and a spacing material.
Main Results:
- Passive monitors demonstrated viability for organic solvent vapor monitoring under specified conditions.
- The Energetics Science series 9000 CO dosimeter met the criterion of being within +/- 25% of the true value 95% of the time; the General Electric model did not.
- The developed NO2 sampling method exhibited an average bias of 7% and a coefficient of variation of 10% over the tested concentration range.
Conclusions:
- Passive monitors are suitable for specific organic solvent vapor monitoring applications.
- The Energetics Science series 9000 CO dosimeter is a reliable tool for workplace CO monitoring.
- The novel Poroplastic film-based NO2 sampler offers a promising and accurate method for nitrogen dioxide assessment in workplace environments.