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Diode laser-based gas analyser for the simultaneous measurement of CO2 and HF in volcanic plumes

  Articoli su Riviste JCR/ISI  (anno 2018)

Autori:  Chiarugi A., Viciani S., D'Amato F., Burton M

Affiliazione Autori:  INGV, National Institute for Geophysics and Vulcanology, Pisa, Italy; CNR – National Institute of Optics, Firenze, Italy; University of Manchester, School of Earth and Environmental Science, Manchester, UK

Riassunto:  A portable analyser is described for simultaneous detection of CO2 and HF emitted by volcanoes and fumaroles. The system is based on two fibre-coupled distributed feedback lasers and only one multipass cell, and provides the absolute concentration values of the two gases, without requiring a calibration procedure, at a maximum rate of 4 Hz. The spectrometer can operate both in a closed-cell configuration and in an open-cell set-up, with the latter mitigating problems associated with chemisorption of the HF molecule. The concept, practical realization and laboratory performance of the device are presented, together with results from a first test campaign measuring volcanic gases emitted from the crater of Vulcano, Italy. We obtained an in-field sensitivity of 320 ppb for CO2 and 20 ppb for HF at 2 s integration time.

Volume n.:  11 (1)      Pagine da: 329  a: 339
Ulteriori informazioni:  The activity was supported by the FP7-IDEAS-ERC Project CO2Volc (Grant 279802). The authors thank Marco De Pas, Mauro Giuntini and Alessio Montori for the realization of the non-commercial electronics, and Roberto Calzolai and Massimo D
DOI: 10.5194/amt-11-329-2018

   *Citazioni: 1
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  15/04/2018

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