Welcome to the Mass Spectrometry Facility section of the School of Chemistry and Chemical Biology website.
About Mass Spectrometry
Mass Spectrometry (MS) measures mass (m) to charge (z) ratio, i.e. (m/z).
Mass of a molecule can be categorised into two types: Exact Mass, where the sum of the most abundant mono-isotopic masses of component elements is counted and Molecular Mass, which sums the weighted averages of all the natural elements present in the molecule.
Generally the number of sites accessible for protonation [M+ H]+ or deprotonation [M- H]- determines the number of charges that a molecule can carry. Besides protonation, i.e. addition of H+ ion, adducts of pther cations (most commonly Na), are frequently seen in the electrospray mass spectra on positive ion mode.
Mass Spectrometry Adduct Ions pdf
Services Available
MS
MS/MS
LC-MS
LC-MS/MS
GC/MS
Exact Mass Measurements for compounds whose molecular masses are less than 1000 Da
Instrumentation
Mass Spectrometers:
Micromass / Waters Corp. USA
Quattro microTM LC-MS/MS (fully automated for normal mass screening)
Liquid chromatography time-of-flight (LCT) mass spectrometer
Both these instruments are equipped with electrospray source and have HPLC online to the ES source.
Quattro microTM LC-MS/MS system LCT Mass Spectrometer
GC/MS Equipment:
GCT premier equipped with Electron Impact (EI), Chemical Ionisation (CI) and Direct Chemical Ionisation (DCI) probe.
Thermo Finnigan Trace GC/MS
For higher molecular weight analysis: MALDI ToF
Submitting a Sample
Mass Spectrometric Analysis Sample Submission Forms:
Word Format Mass Spec Sample Submission Form
PDF Format Mass Spec Sample Submission Form
For further information on submitting samples: Mass Spectrometry submitting samples instructions
For submitting multiple sample, please use one form and see multiple sample submissions
Mass Spec Multiple Samples PDF MS1
Mass Spectrometry Staff:
Kevin Conboy – Facility Manager
School of Chemistry and Chemical Biology
Belfield, Dublin 4
Telephone: 00353 (0)1 716 2306
Lab: 00353 (0)1 716 2272
E-mail: kevin.conboy@ucd.ie
Adam Coburn – Technical Officer
Telephone: 00353 (0)1 716 2963
adam.coburn@ucd.ie