A new approach for diffusive sampling based on SPME for occupational exposure assessment.

Area of Science:

• Environmental Science
• Analytical Chemistry
• Occupational Health

Background:

• Passive sampling is crucial for evaluating environmental volatile organic compound (VOC) exposures.
• Solid-phase microextraction (SPME) is a reliable technique for air sampling and is being adapted for passive sampling.
• Assessing time-weighted average exposure to VOCs requires effective passive sampling methods.

Purpose of the Study:

• To evaluate the performance of a novel SPME-based passive sampler for diffusive monitoring of VOCs.
• To determine the uptake rates and assess the reliability of the SPME passive sampler for toluene and chlorobenzene.
• To investigate the influence of various environmental factors on sampler performance.

Main Methods:

• A cylindrical diffusion cell with a carboxen/polydimethylsiloxane fiber was used as the SPME passive sampler.
• Experimental uptake rates were determined for toluene and chlorobenzene in standard atmospheres.
• Sampler behavior was tested under varying concentrations, environmental conditions, and in real-world settings like gas stations.

Main Results:

• The mean diffusive uptake rates were 2.14 mL/min for toluene and 2.57 mL/min for chlorobenzene.
• No significant effects of concentration or sampling time were observed for toluene and chlorobenzene within the studied ranges.
• The SPME sampler accurately reflected average exposure concentrations and showed comparable results to a commercial diffusive sampler.

Conclusions:

• The developed SPME passive sampler demonstrates reliable performance for the diffusive monitoring of VOCs.
• This SPME device shows significant potential for occupational exposure assessment.
• Further studies on environmental factors confirm the sampler's robustness for real-world applications.