Institut de Chimie Moléculaire et des Matériaux d'Orsay

Mass spectrometry



Mass service
Send an email

Send an email

Send an email

Build.: 410 groundfloor

Office: 01 69 15 47 65

Lab: 01 69 15 33 76



The mass spectrometry service is temporarily open only for ESI analysis (stable molecules with m/z<1000).
We are doing everything to fully re-open it as soon as possible, in the best possible sanitary conditions.
Thank you for your understanding.

Information obtained

The mass spectrometry is an analysis technique that allows to identify molecules by measuring their mass and to characterize their structure.

According to the methods of ionization, we can obtain the mass and the molecular formula of molecule as well as structural information.

Which analysis for your sample ?

Electrospray (ESI) is used for polar and/or high molecular weight molecules.

The electron impact (IE) or chemical ionization (IC) modes coupled to a gas chromatograph are more advisable for apolar molecules and low molecular weight.

The APCI is restricted to molecules of low polarity.

Here is a table to help you to choose :

ionization modes and applicable compounds-small.png

How to use 

Users bring or send a request to the mass service by completed the form below :

Download a spectra request form .


For ESI analysis you need to :

  • For stable molecule and m/z <1000

Book online with GRR:
- Go to ICMMO’s Intranet (French version)
- Click under "Réservations" on "Masse" (a new window opens, verify you are in "Plateforme technique" ; "Masse"; "ESI - routine")
- Use your ADONIS username and password to log in.
- Click on "+" to book (5 max/person/day) the time does not mean anything, book in in a successive way.
- Write the compound name in "Brève description" and choose your team above “Équipe”.
Do not change the other parameters (durée, domaine, type...).

Once completed, drop your analysis sheet and sample attached (1mg) before 10:30am the day of the analysis. Drop them in the good drawer in the mass spectrometry entry hall.

If you drop your sample after 10:30am we could not analyse it.

  • For sensible molecule  (temperature, solvents, air...) and/or high mass (m/z >1000) and/or for organo-metallic chemicals

Please make an appointment at :


For APCI analysis you need to :

Please make an appointment at :


For GC/MS (EI or CI) analysis you need to :

Drop your analysis sheet and sample attached (5mg) in the "GC/MS" drawer in the mass spectrometry entry hall.
Give us GC/FID chromatogram and oven conditions.


Reminder for all analysis :
Your analysis sheet must be fully completed, the sample's name must be written on the vial (2mL minimum).


Results :

For ICMMO's staff the results are available on the mass server (How to connect - French version).
The results are sorted by team. An automatic e-mail is sent when a new result is available in your personal folder. 

The samples to be collected will be available in the mass spectrometry entry hall, sorted by team.


External services possible.


Coupling in liquid or gas chromatography are possible.