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Elemental analysis


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Contact

Maurice Paaßen
NC 2/32
Fon: +49(0)234 32 -28641
maurice.paassen[at]rub.de

sample pick up and return NC 04/125

Please note the measuring conditions

Please fill your substance into glass vials.

For air-sensitive substances, depending on the sample, you will get pre-weighed Sn containers or, for fluorine-containing samples, Ag containers that you can fill in the glovebox.
The samples should contain 1-2 mg carbon.
Please indicate all elements of the compound.
The ruthenium content must not exceed 10%.
Compounds containing osmium must not be measured at all, as these contaminate the system and thus falsify all subsequent analyses.
The content data are important for the initial weight.

The costs for the use of the elementary analysis service are based on the following table:
A three-user distinction is used which leads to the different estimation of personnel costs and overhead. The work is always done by the staff of the Elemental Analysis Department. The estimated overhead is based on the specifications of the Ruhr University Bochum.

charges per sample in 2021
internal user external user (RUB) non-RUB users
6,10 € 16,26 € 29,01 €

Notes: Users and calculated costs:

  • internal users = members of the Faculty of Chemistry and Biochemistry of the RUB Usage
    costs = 10% personnel costs + usage/wear costs
  • external users = members of other RUB faculties usage
    costs = 100% personnel costs + usage/wear costs
  • non-RUB users = non-members of the RUB Usage
    costs = 100% personnel costs + usage/wear costs + ancillary labour costs + VAT

user regulations

AUTOMATIC SAMPLER FOR HIGH SAMPLE THROUGHPUT

  • 120 samples up to 300 mg can be loaded into the integrated autosampler.  

HIGH TEMPERATURE COMBUSTION FOR HIGHEST ACCURACY

  • In a first zone, a permanent combustion or pyrolysis temperature of up to 1200°C is the prerequisite for accurate S or O determination.
  • For special applications, e.g. in IRMS analysis, even 1400°C are applicable.
  • In a 2nd zone, NOx is reduced to N2 by heated copper. The user can choose between small or large tube diameters, depending on the sample volume.  

INNOVATIVE GAS SEPARATION METHOD

  • N2 is transferred by the helium carrier gas stream to the detector, while CO2, H2O and SO2 are adsorbed on a column. By heating the column step by step, "temperature programmed desorption" (TPD) of the gases takes place and complete separation is achieved even with large differences in concentration (patent pending).