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Open AccessArticle

Intercomparison of Multiple UV-LIF Spectrometers Using the Aerosol Challenge Simulator

1
Centre for Atmospheric Science, The University of Manchester, Manchester M13 9PL, UK
2
Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK
3
Droplet Measurement Technologies, Longmont, CO 80503, USA
4
Laboratoire des Sciences du Climat et de l’Environnement, 91191 Gif-sur-Yvette, France
5
Particle Instruments Research Group, University of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, UK
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(12), 797; https://doi.org/10.3390/atmos10120797
Received: 6 November 2019 / Revised: 27 November 2019 / Accepted: 3 December 2019 / Published: 9 December 2019
(This article belongs to the Special Issue Detection and Monitoring of Bioaerosols)
Measurements of primary biological aerosol particles (PBAPs) have been conducted worldwide using ultraviolet light-induced fluorescence (UV-LIF) spectrometers. However, how these instruments detect and respond to known biological and non-biological particles, and how they compare, remains uncertain due to limited laboratory intercomparisons. Using the Defence Science and Technology Laboratory, Aerosol Challenge Simulator (ACS), controlled concentrations of biological and non-biological aerosol particles, singly or as mixtures, were produced for testing and intercomparison of multiple versions of the Wideband Integrated Bioaerosol Spectrometer (WIBS) and Multiparameter Bioaerosol Spectrometer (MBS). Although the results suggest some challenges in discriminating biological particle types across different versions of the same UV-LIF instrument, a difference in fluorescence intensity between the non-biological and biological samples could be identified for most instruments. While lower concentrations of fluorescent particles were detected by the MBS, the MBS demonstrates the potential to discriminate between pollen and other biological particles. This study presents the first published technical summary and use of the ACS for instrument intercomparisons. Within this work a clear overview of the data pre-processing is also presented, and documentation of instrument version/model numbers is suggested to assess potential instrument variations between different versions of the same instrument. Further laboratory studies sampling different particle types are suggested before use in quantifying impact on ambient classification. View Full-Text
Keywords: PBAP; biological aerosol; bioaerosol; UV-LIF; WIBS; WIBS New Electronic Option (WIBS-NEO); MBS PBAP; biological aerosol; bioaerosol; UV-LIF; WIBS; WIBS New Electronic Option (WIBS-NEO); MBS
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    Doi: 10.5281/zenodo.3567097
    Description: Reserved DOI for accompanying UV-LIF data upload.
MDPI and ACS Style

Forde, E.; Gallagher, M.; Walker, M.; Foot, V.; Attwood, A.; Granger, G.; Sarda-Estève, R.; Stanley, W.; Kaye, P.; Topping, D. Intercomparison of Multiple UV-LIF Spectrometers Using the Aerosol Challenge Simulator. Atmosphere 2019, 10, 797. https://doi.org/10.3390/atmos10120797

AMA Style

Forde E, Gallagher M, Walker M, Foot V, Attwood A, Granger G, Sarda-Estève R, Stanley W, Kaye P, Topping D. Intercomparison of Multiple UV-LIF Spectrometers Using the Aerosol Challenge Simulator. Atmosphere. 2019; 10(12):797. https://doi.org/10.3390/atmos10120797

Chicago/Turabian Style

Forde, Elizabeth; Gallagher, Martin; Walker, Maurice; Foot, Virginia; Attwood, Alexis; Granger, Gary; Sarda-Estève, Roland; Stanley, Warren; Kaye, Paul; Topping, David. 2019. "Intercomparison of Multiple UV-LIF Spectrometers Using the Aerosol Challenge Simulator" Atmosphere 10, no. 12: 797. https://doi.org/10.3390/atmos10120797

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