Particulate and nicotine sampling in public facilities and offices

Area of Science:

• Environmental Science
• Public Health
• Occupational Health

Background:

• Indoor air quality (IAQ) significantly impacts public health and workplace productivity.
• Particulate matter smaller than 2.5 microns (PM-2.5) and environmental tobacco smoke (ETS) are key indoor air pollutants.
• Characterizing IAQ in public and office buildings is crucial for assessing exposure risks.

Purpose of the Study:

• To characterize and quantify indoor air quality in public facilities and office buildings.
• To measure concentrations of PM-2.5 and ETS in various indoor environments.
• To evaluate the effectiveness of real-time monitoring instruments for IAQ assessment.

Main Methods:

• Integrated sampling of PM-2.5 using Harvard Aerosol Impactors and gravimetric analysis.
• Collection and gas chromatography analysis of nicotine as an ETS marker.
• Real-time monitoring using Handheld Aerosol Monitor (HAM) and Miniature Real-Time Aerosol Monitor (MINIRAM) nephelometers.

Main Results:

• PM-2.5 concentrations ranged from 6.0 to 550 µg/m³ across 21 monitored structures in Boston.
• Nicotine concentrations reached up to 26 µg/m³ in designated smoking rooms.
• Real-time nephelometer measurements correlated better with integrated PM-2.5 in smoking areas.

Conclusions:

• Public facilities and offices can have significant levels of PM-2.5 and ETS.
• Smoking areas contribute disproportionately to indoor air pollution.
• Real-time monitoring shows promise for assessing IAQ, especially in identifying high-exposure zones.