Aerosol Chemical Speciation Monitor

The Aerodyne Aerosol Chemical Speciation Monitor (ACSM) measures quantitative particle mass loading and chemical composition in real-time for non-refractory sub-micron aerosol particles.   Smaller, lower cost and more robust than our AMS instruments, the ACSM is designed for long-term unattended deployment and routine monitoring applications.

Unlike the AMS, the ACSM does not provide size resolved composotion information.

ACSM Applications

  • Measurement of aerosol mass loadings and chemical composition with >15 minute time resolution for routine environmental monitoring.
  • Routinely reports average particle NO3, SO4, NH4, Cl and Organic fraction.
  • Advanced analysis provides separation and quantification of organic aerosol species including HOA (hydrocarbon-like organic aerosol, linked to primary combustion sources) and OOA (oxygenated organic aerosol, linked to secondary aersol sources) using numerical deconvolution methods (e.g., Positive Matrix Factorization)
  • Deployment on mobile platforms, such as vans.
  • Chamber studies of aerosol formation and processing.
  • Industrial process monitoring.

ACSM Advantages

  • Quantitative, universal detection with thermal vaporization and electron impact ionization mass spectrometry.
  • Internal calibration reference.
  • Automated zeroing with a filter.
  • Long-term (months) unattended operation with minimal maintenance.
  • Remote control ready.

ACSM Physical Specifications

Size:     Bench top, 21” x 19.5” x 34” (53.34 cm x 49.53 cm x 86.36 cm)
Optional Rack mount, 19” x 21“ x 17U (48.26 cm x 53.34 cm, 75.57 cm)

Weight: 140 lbs (64 kg).

Power: 300 Watts. 85-264 VAC, 47-63 Hz.

Computer: Laptop.

Packaging: Shipped in one reusable container. Total shipping weight 280 lbs (130 kg).

ACSM Development Projects

Compact-Time-of-Flight Aerosol Chemical Speciation Monitor (ccTOF-ACSM)

The compact-Time-of-Flight Aerosol Chemical Speciation Monitor (ccTOF-ACSM) is a time-of-flight mass spectrometer version of the ACSM.  This instrument has an application where small instrument size is important (as with the ACSM) but faster time resolution and higher sensitivity are required, such as when operating from an aircraft platform.  The ccTOF is a cost-effective compact ToF mass spectrometer designed by Tofwerk.

Selected Publications

Real-Time Continuous Characterization of Secondary Organic Aerosol Derived from Isoprene Epoxydiols in Downtown Atlanta, Georgia, Using the Aerodyne Aerosol Chemical Speciation Monitor, S. H. Budisulistiorini, M. R. Canagaratna, P. L. Croteau, W. J. Marth, K. Baumann, E. S. Edgerton, S. L. Shaw, E. M. Knipping, D. R. Worsnop, J. T. Jayne, A. Gold, J. D. Surratt, Environ. Sci. Technol.,  47, 5686−5694, DOI: 10.1021/es400023n, 2013 .

Characterization of summer organic and inorganic aerosols in Beijing, China with an Aerosol Chemical Speciation Monitor, Y. Sun, Z. Wang, H. Dong, T. Yang, J. Li, X. Pan, P. Chen, J. T. Jayne, Atmos. Environ., 51, 250-259, 2012.

An Aerosol Chemical Speciation Monitor (ACSM) for Routine Monitoring of the Composition and Mass Concentrations of Ambient Aerosol, N. L. Ng, S. C. Herndon, A. Trimborn, M. R. Canagaratna, P. L. Croteau, T. B. Onasch, D. Sueper, D. R. Worsnop, Q. Zhang, Y. L. Sun and J. T. Jayne, , Aerosol Sci. Tech., 45, 770-784, DOI: 10.1080/02786826.2011.560211, 2011.

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