Aerosol Instrumentation >> Aeromegt

Laser Ablation Aerosol Particle Time of Flight Mass Spectrometer (LAAPToF)

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Hyphenated laser ablation–mass spectrometry instruments have been recognized as useful analytical tools for the detection and chemical characterization of aerosol particles. The laser ablation aerosol particle time-of-flight mass spectrometer (LAAP-ToF-MS) is designed for aerodynamic particle sizing using two 405 nm scattering lasers and characterization of the chemical composition of single aerosol particle via ablation/ionization by a 193 nm excimer laser and detection in a bipolar time-of-flight mass spectrometer with a mass resolving power of m/Δm > 600. It is composed of three regions: the inlet system, the particle time of flight (PTOF) region and the ablation/mass spectrometer region. The LAAP-ToF-MS enables high temporal resolution measurements of the chemical composition of ambient particles, provides new insights into environmental science, and a new investigative tool for atmospheric chemistry and physics, aerosol science and health impact studies.