Difference between revisions of "AMS Spectra Intercomp"

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(Created page with ' The purpose of this page is to serve as a repository of information for the AMS spectral intercomparison experiment. This follows up on [http://cires.colorado.edu/jimenez-group/...')
 
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The purpose of this page is to serve as a repository of information for the AMS spectral intercomparison experiment. This follows up on [http://cires.colorado.edu/jimenez-group/UsrMtgs/UsersMtg10/2009-10_Jimenez_Spectra_Comp.pdf discussions at the 10th AMS Users Meeting] in Toronto, Canada. The objective is to evaluate the variability of the spectra from different AMSs (including Q-AMS, C-ToF-AMS, HR-ToF-AMS in V and W modes, and mini-AMS) for several standard species.
  
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The purpose of this page is to serve as a repository of information for the AMS spectral intercomparison experiment. This follows up on [http://cires.colorado.edu/jimenez-group/UsrMtgs/UsersMtg10/2009-10_Jimenez_Spectra_Comp.pdf discussions at the 10th AMS Users Meeting] in Toronto, Canada. The objective is to evaluate the variability of the spectra from different AMSs (including Q-AMS, C-ToF-AMS, HR-ToF-AMS in V and W modes, and mini-AMS) for several standard substances.
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== Tentative List of Molecules ==
  
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The molecules we are considering are:
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* Choose 5 from the following list (plus any other suggestions):
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** Ammonium nitrate
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** Ammonium sulfate
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** [http://en.wikipedia.org/wiki/Squalene Squalene] (liquid HOA surrogate) (generated by evaporation-condensation)
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** [http://en.wikipedia.org/wiki/Pyrene Pyrene] (PAH, little fragmentation and tendency for multiple charging) (generated by evaporation-condensation)
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** [http://en.wikipedia.org/wiki/Dioctyl_sebacate DOS] (generated by evaporation-condensation)
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** [http://en.wikipedia.org/wiki/Perfluoroalkane a perfluoroalkane] (generated by evaporation-condensation)
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** [http://en.wikipedia.org/wiki/Mannitol Mannitol] (bioaerosol marker) (atomized in water)
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** [http://www.chemicalregister.com/Levoglucosan/Suppliers/pid15266.htm Levoglucosan], BBOA marker (atomized in water)
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** [http://en.wikipedia.org/wiki/Succinic_Acid Succinic acid] (OOA surrogate) (atomized in water)
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** [http://en.wikipedia.org/wiki/Fulvic_Acid Fulvic Acid] (OOA surrogate) (atomized in water)
  
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* Ammonium nitrate
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== Tentative List of Participants ==
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* Ammonium sulfate
 
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* Squalane
 
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* DOS
 
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* sucrose
 
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* PFK
 
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* Levoglucosan
 
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* Succinic acid
 
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* Fulvic Acid
 
  
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Michael Lechner in my group will coordinate
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* Claudia Mohr & Maarten Heringa (PSI): HR-ToF
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– Choose 5 molecules
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* Person TBD, Galway: HR-ToF
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• Squalane, DOS, levoglucosan, sucrose, PFK or PFT, succinic acid, fulvic acid (?)
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* Jay Slowik (Univ. of Toronto): C-ToF
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• + Standard methods of preparation
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* Person TBD: (Aerodyne) 2 HR-ToF, others
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– Prepare 100 mg vials from the SAME sample
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* Johannes Schneider (Max Planck): C-ToF
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– Send them to everyone who is interested
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* Laurent Poulain (IfT, Leipzig, Germany): HR-ToF
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– People run them in all of their AMSs, and upload spectra to website (along with
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* Ann Middlebrook, C-ToF
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vaporizer T, V, A etc.)
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* John Shilling (PNNL): C-ToF or HR-ToF depending on timing
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– We discuss the comparison of the spectra in the next Clinic users meeting
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* Rami Alfarra, Univ. of Manchester, UK: 1 HR-ToF, 1 C-ToF
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* Jimenez Group, Univ. of Colorado-Boulder: 2 HR-ToF, 1 C-ToF, 1 Q-AMS
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== Practical Details ==
 +
* Michael Lechner in the Jimenez group will coordinate sending the samples and receiving the spectra
 +
* Importantly, we need a standard method of preparation
 +
* We will send small glass vials with small quantities of all the standards to all participating groups. It is important that the species come from the same sample, as impurities vary depending on the supplier and even between batches of the same supplier.
 +
* We will also send, or show how to order NERL water to all groups to make sure that we don't have different impurities in the atomization water
 +
* Atomizers should be rinsed with DI water twice between compounds.
 +
* People run all the standards on all of their AMSs, and upload spectra to website (along with
 +
vaporizer displayed T, V, A etc.)
 +
* Donna will implement a button in Squirrel and Pika to export the spectra in an standard format to reduce data analysis and intercomparison chores.
 +
* We will discuss the comparison of the spectra in the next Clinic or Users Meeting, depending on how quickly we make progress.

Revision as of 19:22, 13 November 2009

The purpose of this page is to serve as a repository of information for the AMS spectral intercomparison experiment. This follows up on discussions at the 10th AMS Users Meeting in Toronto, Canada. The objective is to evaluate the variability of the spectra from different AMSs (including Q-AMS, C-ToF-AMS, HR-ToF-AMS in V and W modes, and mini-AMS) for several standard species.

Tentative List of Molecules

  • Choose 5 from the following list (plus any other suggestions):
    • Ammonium nitrate
    • Ammonium sulfate
    • Squalene (liquid HOA surrogate) (generated by evaporation-condensation)
    • Pyrene (PAH, little fragmentation and tendency for multiple charging) (generated by evaporation-condensation)
    • DOS (generated by evaporation-condensation)
    • a perfluoroalkane (generated by evaporation-condensation)
    • Mannitol (bioaerosol marker) (atomized in water)
    • Levoglucosan, BBOA marker (atomized in water)
    • Succinic acid (OOA surrogate) (atomized in water)
    • Fulvic Acid (OOA surrogate) (atomized in water)

Tentative List of Participants

  • Claudia Mohr & Maarten Heringa (PSI): HR-ToF
  • Person TBD, Galway: HR-ToF
  • Jay Slowik (Univ. of Toronto): C-ToF
  • Person TBD: (Aerodyne) 2 HR-ToF, others
  • Johannes Schneider (Max Planck): C-ToF
  • Laurent Poulain (IfT, Leipzig, Germany): HR-ToF
  • Ann Middlebrook, C-ToF
  • John Shilling (PNNL): C-ToF or HR-ToF depending on timing
  • Rami Alfarra, Univ. of Manchester, UK: 1 HR-ToF, 1 C-ToF
  • Jimenez Group, Univ. of Colorado-Boulder: 2 HR-ToF, 1 C-ToF, 1 Q-AMS

Practical Details

  • Michael Lechner in the Jimenez group will coordinate sending the samples and receiving the spectra
  • Importantly, we need a standard method of preparation
  • We will send small glass vials with small quantities of all the standards to all participating groups. It is important that the species come from the same sample, as impurities vary depending on the supplier and even between batches of the same supplier.
  • We will also send, or show how to order NERL water to all groups to make sure that we don't have different impurities in the atomization water
  • Atomizers should be rinsed with DI water twice between compounds.
  • People run all the standards on all of their AMSs, and upload spectra to website (along with

vaporizer displayed T, V, A etc.)

  • Donna will implement a button in Squirrel and Pika to export the spectra in an standard format to reduce data analysis and intercomparison chores.
  • We will discuss the comparison of the spectra in the next Clinic or Users Meeting, depending on how quickly we make progress.
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