Theory and validation of solid-phase microextraction and needle trap devices for aerosol sample

Area of Science:

• Environmental Chemistry
• Analytical Chemistry
• Atmospheric Science

Background:

• Previous aerosol studies using SPME primarily analyzed volatile and semivolatile gaseous compounds.
• Quantitative analysis of particle-bound compounds presented significant challenges.

Purpose of the Study:

• To develop and validate a combined SPME and needle trap (NT) device method for analyzing both gaseous and particle-bound compounds in atmospheric samples.
• To provide a complete solution for efficient and accurate aerosol studies.

Main Methods:

• Aerosol samples were collected using a pump drawing air through an NT device packed with carboxen sorbents.
• The NT device captured both gaseous compounds and particulate matter.
• Direct SPME was used concurrently to quantify gaseous compounds.

Main Results:

• The combined SPME-NT approach successfully analyzed seasalt aerosol, barbecue smoke, and cigarette smoke.
• Polycyclic Aromatic Hydrocarbons (PAHs) were detected at concentrations in the ng/L range.
• The method demonstrated high efficiency and accuracy for aerosol sampling.

Conclusions:

• The integrated SPME and NT devices offer a comprehensive solution for aerosol analysis.
• This combined technique is simple, convenient, cost-effective, and suitable for both laboratory and field applications.
• It overcomes previous limitations in analyzing particle-bound compounds in aerosols.