Characterization of Photothermal Desorption-Compatible Diffusive Samplers for Volatile Organic Compounds.

Area of Science:

• Occupational Health and Safety
• Analytical Chemistry
• Environmental Science

Background:

• Volatile organic compounds (VOCs) are prevalent in many workplaces, posing risks of occupational exposure.
• Accurate exposure assessment is crucial for industrial hygienists to ensure employee health and regulatory compliance.
• Existing methods for VOC exposure assessment require improved analytical sensitivity and reliability.

Purpose of the Study:

• To design a prototype diffusive sampler compatible with photothermal desorption (PTD).
• To characterize the sampling efficiencies of the prototype for key VOCs: toluene, n-hexane, trichloroethylene, and isopropyl alcohol.
• To evaluate the potential of PTD-compatible samplers for enhancing analytical sensitivity in occupational exposure monitoring.

Main Methods:

• Development of a novel diffusive sampler designed for photothermal desorption (PTD) analysis.
• Empirical quantification of sampled masses for toluene, n-hexane, trichloroethylene, and isopropyl alcohol at occupationally relevant concentrations.
• Comparison of empirically observed sample masses with theoretically predicted values to determine sampling efficiencies.

Main Results:

• Quantified sampled masses: Toluene (12.17 ± 0.06 mg), n-hexane (8.2 ± 0.1 mg), trichloroethylene (3.97 ± 0.06 mg), and isopropyl alcohol (8.0 ± 0.1 mg).
• Determined analyte sampling efficiencies: Toluene (2.2 ± 0.1), n-hexane (1.7 ± 0.1), trichloroethylene (1.2 ± 0.1), and isopropyl alcohol (0.51 ± 0.05).
• The PTD-compatible diffusive sampler prototype demonstrated effective analyte collection and promising sampling efficiencies.

Conclusions:

• The developed PTD-compatible diffusive sampler prototype shows significant potential for improving analytical sensitivity in VOC exposure assessments.
• This technology offers a promising advancement for industrial hygienists in monitoring workplace air quality and protecting employee health.
• Further development of this field-ready sampling device could revolutionize occupational exposure monitoring strategies.