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Mass spectrometry facility

Mass spectrometry facility

Stable isotopes such as 15N or 13C are important tools which can be used to trace biogeochemical reactions, enabling the identification and quantification of microbial processes in near insitu condition. We measure both the incorporation of stable isotopes into microbial biomass and the transformations of labeled compounds between one form and another (i.e. the reduction of NO3- to N2) using a variety of isotope ratio measuring (IRMS) techniques.For more information on the microbial processes we are interested in and the applications of isotope ratio mass spectrometry within our department please visit our projects page.We use the following instruments in our group for the analysis of different isotopes from solid, liquid or gaseous samples.


Delta Plus XP coupled to a Flash EA 112

Isotopic ratio mass spectrometer coupled to an elemental analyzer for the analysis of δ13C and δ15N on solid samples.


IsoPrime100 combined with a Trace Gas

Multicollector isotopic ratio- mass spectrometer for gas analysis of N2, N2O, NO, O2, CH4 and isotopomers on water or gas samples at low (nanomolar) concentrations.


Picarro G2201

Cavity Ring-Down Spectrometer for carbon isotope analysis, it is coupled to an auto sampler (Automate FX) for dual or single δ13C isotopic analysis of CO2 (DIC) and CH4 from water or gas samples.


GAM200 InProcess Instrument

A membrane inlet mass spectrometer (MIMS) enabling us to do online, real time measurements of 29+30N2, O2 and Ar, with a variety of customized set-ups. Other applications include for example labeling percentage measurements of N2 for N2-fixation experiments.



Biogeochemistry Group

Gabriele Klockgether

MPI for Marine Microbiology
Celsiusstr. 1
D-28359 Bremen




+49 421 2028-6420

Gabriele Klockgether
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