Aerosol Instrumentation >> Aerodyne Research

Mini-Aerosol Mass Spectrometer System (MINI-AMS)

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    Mini AMS is a compact version of the AMS that has been used widely in the past to obtain fast, size-resolved, non-refractory chemical composition of submicron aerosol particles . Similar to previous versions, air is sampled through a critical orifice and a system of aerodynamic lenses in which particles are focused into a narrow beam. After exiting the lens and passing through a skimmer, sample flow is expanded into a differentially pumped chamber in which particles travel at different speeds, depending on their size. At the end of the chamber, particles impact on a tungsten vapourizer and non-refractory components are vaporized. Vapours are ionized by electron impact and ions are extracted into the mass analyzer. A chopper wheel is used to chop, block, or open the particle beam to allow for measurements of aerosol mass distributions or mass spectra.

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      Detailed Specs

      Measure real-time, non-refractory, size-resolved particulate chemical composition and mass.

      Detection Limit:0.025 (µg/m3)
      Mass Resolving Power: 600 (m/∆m)
      Mass Range (m/z): 1- 400

      • Compact vacuum system for applications where space is limited (i.e., mobile platforms)
      • Similar size compared to TOF-ACSM but provides size resolution measurements
      • Aerodynamic particle lens for efficient gas-particle separation
      • Linear universal detection through two-step thermal vaporization (~600 C) and electron impact ionization process
      • Single particle detection mode via event trigger
      • Mass spectrometric analysis (0-400 m/z)
      • Particle aerodynamic diameter determined from particle time-of-flight (velocity) measurements using a particle beam chopping technique
      • Remote control ready

      Detection Limit: (µg m-3, 10 minute, 3σ)
      Organic: 0.08
      Sulfate: 0.007
      Nitrate: 0.008
      Chloride: 0.008
      Ammonium: 0.034

      70-700 nm vacuum aerodynamic diameter (standard lens)
      110-3500 nm (PM2.5 lens option)
      1-5 minute typical data reporting interval
      Typical fast MS mode data rate 1 Hz
      85 cc min-1 (volumetric flow)
      Length x Depth x Height: 65 cm x 51 cm x 60 cm

      Weight: 75 kg