Abstract.
A photoacoustic spectrometer for the simultaneous detection of isoprene and the deuterated species [4,4-2H]-2-methyl-1,3-butadiene (isoprene-d2) is presented. Using a sealed-off 13CO2 laser a single-component detection limit of 400 ppt (isoprene) and 600 ppt (isoprene-d2) was achieved. Simultaneous monitoring of both compounds allowed the detection of labelling levels down to 6% (isoprene-d2 in total isoprene) with a time resolution of 3 min.
In emission studies with Eucalyptus globulus, the deuterated precursor [4,4-2H]-1-deoxy-D-xylulose was fed to a leaf through the transpiration stream. Emission of isoprene-d2 started as early as 10 min after application of the precursor.
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Received: 3 May 2002 / Revised version: 31 May 2002 / Published online: 21 August 2002
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Kühnemann, F., Wolfertz, M., Arnold, S. et al. Simultaneous online detection of isoprene and isoprene-d2 using infrared photoacoustic spectroscopy. Appl Phys B 75, 397–403 (2002). https://doi.org/10.1007/s00340-002-0961-1
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DOI: https://doi.org/10.1007/s00340-002-0961-1