Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.400 IF 3.400
  • IF 5-year value: 3.841 IF 5-year
  • CiteScore value: 3.71 CiteScore
  • SNIP value: 1.472 SNIP 1.472
  • IPP value: 3.57 IPP 3.57
  • SJR value: 1.770 SJR 1.770
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 70 Scimago H
    index 70
  • h5-index value: 49 h5-index 49
Discussion papers
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 31 Jan 2019

Submitted as: research article | 31 Jan 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Measurement Techniques (AMT).

Photoacoustic measurement may significantly overestimate NH3 emissions from cattle houses due to VOC interferences

Dezhao Liu1,2, Li Rong2, Jesper Kamp2, Xianwang Kong1, Anders Peter Adamsen3, Albarune Chowdhury2, and Anders Feilberg2 Dezhao Liu et al.
  • 1Zhejiang University, College of Biosystems Engineering and Food Science, Yuhangtang Road 866, 310058 Hangzhou, China
  • 2Aarhus University, Department of Engineering, Finlandsgade 22, 8200 Aarhus N, Denmark
  • 3APSA, c/o Agro Business Park, Niels Pedersens Allé 2, 8830 Tjele, Denmark

Abstract. Infrared photoacoustic spectroscopy (PAS) is a widely used method for measurement of NH3 and greenhouse gas emissions especially in agriculture, but non-targeted gases such as volatile organic compounds (VOCs) from cattle barns may interfere with target gases causing inaccurate results. This study made an estimation of NH3 interference in PAS caused by selected non-targeted VOCs which were simultaneously measured by a PAS and a PTR-MS (proton transfer reaction mass spectrometry). Laboratory calibration were performed for NH3 measurement and VOCs were selected based on a headspace test of the feeding material maize silage. Various levels of interference of tested VOCs were observed on NH3 and greenhouse emissions measured by the PAS. Particularly, ethanol, methanol, 1-butanol, 1-propanol and acetic acid were found to have highest interference on NH3. A linear response was typically obtained, with non-linear relation was however observed for VOCs on N2O emissions. The corrected online NH3 concentrations measured by the PAS from a field study were confirmed to be reasonably correlated to the NH3 concentration measured simultaneously by the PTR-MS. It was concluded that the correction factors could be used for possible data corrections when the concentrations of VOCs could be obtained by using e.g. PTR-MS.

Dezhao Liu et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Dezhao Liu et al.
Total article views: 565 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
473 84 8 565 17 6 6
  • HTML: 473
  • PDF: 84
  • XML: 8
  • Total: 565
  • Supplement: 17
  • BibTeX: 6
  • EndNote: 6
Views and downloads (calculated since 31 Jan 2019)
Cumulative views and downloads (calculated since 31 Jan 2019)
Viewed (geographical distribution)  
Total article views: 419 (including HTML, PDF, and XML) Thereof 409 with geography defined and 10 with unknown origin.
Country # Views %
  • 1
No saved metrics found.
No discussed metrics found.
Latest update: 13 Nov 2019
Publications Copernicus