PTR-MS intercomparison campaign

EUROCHAMP PTR-MS intercomparison campaign at Orléans, France

In the framework of EUROCHAMP 2020, a PTR-MS intercomparison campaign will be performed during three weeks (from 6th may to 24th May 2019, including time for set-up and pack up) in Helios simulation chamber in Orléans, France (

The PTR-MS technique has become widespread in the atmospheric community, including the chamber community, since it allows simultaneous low volume sampling, real-time analysis, and extremely low detection limits for a wide spectrum of VOCs and inorganic gases. Nevertheless, PTR-MS remains a challenging technique where the experience of users is central to guarantee high performance. Transfer of knowledge and best practices (e.g. signal normalization procedure, interferences, ionization selection, instrument settings, sampling line (material, heated or not, with or without filters)) are still required to generate reliable and traceable results. Therefore, the intercomparison campaign aims at 

- determining advantages/drawbacks of different instrument type and practices, 

- but also at characterizing reliability and uncertainties, and finally at developing recommendations about best practices.

During this campaign, PTR-MS instruments will be tested in various simulated environments (e.g. anthropogenic vs biogenic) and conditions (e.g. high humidity vs low humidity).

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