Jump to main content
Jump to site search


Oxygen sensors for flow reactors – measuring dissolved oxygen in organic solvents

Author affiliations

Abstract

In an effort to push the boundaries of optical oxygen sensors, this contribution shows the development of a measurement system for high O2 content in organic solvents specifically designed for flow reactors. Presented sensors were prepared by directly melting an oxygen indicator dye into a highly resistant polymer matrix, leading to the ability to measure oxygen contents up to 59 mmol L−1 in tetrahydrofuran, toluene, acetone, dimethylformamide, cyclohexane and methyl tert-butyl ether. Long-term effects to the solvent were investigated by exposing the sensors for 22 hours to the respective solvent at 25 °C. Linearity according to Stern–Volmer was obtained for every single sensor in order to provide a system that can be easily initialized by two-point calibration into continuous flow reactors. To demonstrate the applicability of the sensor under reaction conditions, an oxidation of a Grignard reagent with molecular oxygen was performed in a flow reactor. The sensors were able to show the oxygen decrease during reaction and allowed online reactant quantification.

Graphical abstract: Oxygen sensors for flow reactors – measuring dissolved oxygen in organic solvents

Back to tab navigation

Publication details

The article was received on 21 Jun 2019, accepted on 27 Aug 2019 and first published on 30 Aug 2019


Article type: Paper
DOI: 10.1039/C9RE00253G
React. Chem. Eng., 2019, Advance Article
  • Open access: Creative Commons BY license
  •   Request permissions

    Oxygen sensors for flow reactors – measuring dissolved oxygen in organic solvents

    P. Sulzer, R. Lebl, C. O. Kappe and T. Mayr, React. Chem. Eng., 2019, Advance Article , DOI: 10.1039/C9RE00253G

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements