High-throughput analysis of single particles by micro laser induced breakdown spectroscopy

Area of Science:

• Analytical Chemistry
• Environmental Science
• Spectroscopy

Background:

• Accurate multi-elemental analysis of particulate matter is crucial for source identification.
• Traditional single particle analysis methods are often hindered by time-consuming sample preparation.

Purpose of the Study:

• To develop a rapid system for multi-elemental analysis of single particles.
• To overcome limitations of traditional methods in terms of speed and sample preparation.

Main Methods:

• Integration of bright-field microscopy with laser-induced breakdown spectroscopy (LIBS).
• Utilized ultra-thin polyethylene films for efficient particle immobilization and minimal spectral interference.
• Employed rapid vaporization of films during laser ablation to prevent plasma quenching.

Main Results:

• Achieved high throughput for successive spectral collection from single particles.
• Demonstrated successful analysis of particle composition heterogeneity.
• Effectively discriminated between dust particles with similar chemical compositions.

Conclusions:

• The combined microscopy-LIBS system offers a promising, rapid solution for single particle analysis.
• The method enhances throughput and accuracy for identifying particulate matter sources.
• This technique supports environmental risk assessment by providing detailed compositional data.