VOC (Volatile Organic Compounds) measurement is an occupational hygiene measurement performed to determine the concentration of organic chemical substances that easily evaporate at room temperature and are present in workplace air. Chemical products such as solvents, thinners, paints, adhesives, resins, cleaning chemicals, and fuels contain various volatile compounds. Workers inhaling these compounds can experience acute and chronic health effects.
Enterprises using chemicals must regularly perform VOC measurements, evaluate personal exposure levels against legal limits, and maintain adequate ventilation controls.
WHAT IS VOC MEASUREMENT?
VOC measurement is the process of collecting organic vapor samples from workplace air onto active sorbent tubes or evaluating total volatile organic concentrations using direct-reading instruments, followed by laboratory gas chromatography analysis. As a result of measurement, specific chemical compound concentrations (mg/m³, ppm) and personal exposure levels are determined.
VOC measurements can be performed as personal exposure measurements taken within the worker breathing zone or as ambient environment measurements to evaluate process emissions.
WHY IS VOC MEASUREMENT IMPORTANT?
Exposure to volatile organic compounds can cause central nervous system depression, respiratory irritation, liver and kidney damage, and certain compounds (such as benzene) are classified as carcinogenic. Regular VOC measurements are essential for safeguarding worker health.
Thanks to VOC measurements:
- Types and concentrations of volatile organic compounds are determined
- Workers’ personal exposure levels are evaluated
- Compliance with statutory occupational exposure limits is verified
- Ventilation system and local exhaust effectiveness is checked
- Appropriate chemical protective equipment is determined
In conclusion, regular VOC measurements protect employees from toxic chemical hazards and ensure full regulatory compliance.
VOC MEASUREMENT PARAMETERS
The main volatile organic compound measurement parameters we carry out as Haliç Occupational Hygiene Laboratory are as follows:
- Total Volatile Organic Compounds (TVOC) measurement
- Benzene, Toluene, Ethylbenzene, Xylene (BTEX) measurement
- Acetone, ethanol, and isopropanol measurement
- Hexane, heptane, and aliphatic hydrocarbon measurements
- Chlorinated hydrocarbons (trichloroethylene, dichloromethane) measurement
- Personal VOC exposure monitoring
HOW IS VOC MEASUREMENT PERFORMED?
VOC measurement is performed following standardized methodology in accordance with occupational hygiene standards:
- Chemicals used, safety data sheets (SDS), and emission sources are reviewed
- Representative workers and sampling points are selected
- Calibrated personal sampling pumps and sorbent tubes (activated charcoal) are deployed
- Air sampling is conducted during representative work activities
- Sorbent tubes are capped, preserved, and transported to the laboratory
- Gas chromatography analysis is performed, results are benchmarked against limit values and reported
Sampling must be performed throughout representative work activities and pump flow rates must be verified before and after sampling.
Which sectors have high VOC exposure risks?
Sectors with high VOC exposure include painting, coating, automotive refinishing, chemical manufacturing, footwear and leather processing, furniture finishing, printing, plastic manufacturing, and dry cleaning.
What is the difference between personal VOC sampling and ambient VOC measurement?
Personal VOC sampling measures chemical vapors in the worker’s breathing zone during actual work shifts. Ambient measurement determines background concentration in the general workspace or near emission sources.
How often should VOC measurements be conducted?
- Periodically in accordance with risk assessment schedules
- When new chemicals, paints, solvents, or resins are introduced
- When ventilation systems or work methods are altered
- When employees report chemical odor or irritation symptoms
- During official audits and inspections
VOC MEASUREMENT AND TECHNICAL REPORTING
Haliç Occupational Hygiene Laboratory conducts personal and ambient VOC measurements using standardized sampling protocols and laboratory analyses, providing comprehensive technical reports benchmarked against statutory limit values.
In conclusion, enterprises obtain reliable analytical data to control chemical exposure risks, optimize ventilation systems, and ensure employee health and safety.
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