1 / 19

Orbitrap Mass Analyser: a Tool for Titan Complex Molecular Content Exploration

Orbitrap Mass Analyser: a Tool for Titan Complex Molecular Content Exploration. Hervé Cottin Creteil Noel Grand Creteil Cyril Szopa Versailles Nathalie Carrasco Versailles Claude Chapuis Versailles Abdel Bouabdellah Versailles Cécile Engrand Orsay

kelly-meyer
Download Presentation

Orbitrap Mass Analyser: a Tool for Titan Complex Molecular Content Exploration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Orbitrap Mass Analyser: a Tool for Titan Complex Molecular Content Exploration Hervé Cottin Creteil Noel Grand Creteil Cyril Szopa Versailles Nathalie Carrasco Versailles Claude Chapuis Versailles Abdel Bouabdellah Versailles Cécile Engrand Orsay Alexander Makarov Bremen Toulouse Paris Roland Thissen Grenoble Stefano Cornelli Grenoble Pascal Puget Grenoble Christelle Briois Orléans Laurent Thirkell Orléans Amirouche Boukrara Orléans Jean-Pierre Lebreton Orléans Patricia Beauchamp Pasadena Evan Neidholdt Pasadena Jack Beauchamp Pasadena

  2. High mass-resolution for Titan?

  3. C7NH+ 99.0109 resolution C8H3+ 99.0235 7857 C4N3H9+ 99.0797 1761 C5N2H11+ 99.0923 7857 C6NH13+ 99.1049 7853 C7H15+ 99.1174 7920 m/z 28 N2+, C2H4+, HCNH+ Cassini (INMS) ionic densities in Titan ionosphere • Quad masse filter • 60 uma luckily upgraded in 100 amu • Resolution limited to 1 amu

  4. Big molecule synthesis … + - m/z Positive ions <350 Negative ions >1000

  5. Bio molecules synthesis… Horst et al. Accepted in Astrobiology

  6. Tholins mass spectrum at high resolution

  7. C9H16N7 C7H12N9 C11H20N5 Zoom on mass 262 C=12.0000 H= 1.0078 N=14.0031 ISOTOPES C7H12N5O2

  8. Isotopical abundancies,example on complex mixture… 13C 773 774 775

  9. 18O

  10. Orbitrap mass Analyser ?

  11. Preliminary remark, what is orbitrap… Mass Spectrometry :

  12. Perfect quadro logarithmic potential record movement of unperturbed ions during >500ms pressure <10-9 mbar!

  13. How to inject and stabilize ions in this perfect potential? “Electrodynamic squeezing” • a bunch of ions enters in the field, tangentially • ions are squeezed towards central electrode by variation of its potential (deepening of well) • The excitation of quadratic movement is inherent to “off axis” injection Need to pulse ions in the trap! (r,φ) (r,z) Need for very stable HV potential During measurement!

  14. Orbitrap, potential • Ultra high resolution: 100 000 at mass 400, adjustable during mission, as it depends only on the integration time • Very small volume, lightweight : l=4 , f= 4 cm • Good detection Dynamic : 50 000 per spectrum • Positive or negative Ions as only one potential to invert • All ions are analysed simultaneously • No detector, no saturation, … • no RF, no moving part • Ideal for solids or aerosols

  15. Orbitrap for Titan Orbitrap prototype in Orléans Sample handling ionization Ion accumulation Study of optimized MS instrument for the analysis of aerosols/solids/liquids present in the deep atmosphere/surface of Titan

  16. Performances of prototype… Without laser With laser FREQUENCY /KHz

  17. 1 laser shot on Stainless steel R=280 000 m/z

  18. Tholins survive the laser desorption/ionization

  19. Conclusions • Going back to Titan, weneed to do muchbetterthan Cassini. • We know thatvery large (bio)organicmolecules are produced/present in • AtmosphereAerosols • Surface Liquids/ solids • Request for very high resolution mass spectrometry to becharacterized. • Orbitrapis a verypromising analyser/detector for thispurpose. • Howeverbig challenges remain: • Sample handling ? • Ionizationmethod ? • High-Vacuum generation/maintenance ? • Beyond formulas, what about structural analysis ? • … • Further info ? Come & visit posters 7A/B Briois, Cornelliand Thirkell

More Related