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Real-time measurement of bacterial aerosols with the UVAPS: performance evaluation.

Agranovski, V., Ristovski, Z., Hargreaves, M., Blackall, P. J. and Morawska, L. (2003) Real-time measurement of bacterial aerosols with the UVAPS: performance evaluation. Journal of Aerosol Science, 34 (3). p. 301. ISSN 00218502

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Article Link(s): http://dx.doi.org/10.1016/S0021-8502(02)00181-7htt...

Article URL: http://eprints.qut.edu.au/archive/00001221/01/1221.pdf

Abstract

This paper presents the results of the laboratory evaluation of the Ultraviolet Aerodynamic Particle Size Spectrometer, the novel instrument for real-time continues monitoring of bioaerosols. The main focus of this study was on evaluating selectivity, sensitivity, counting efficiency, and the detection limits of the UVAPS. The tests were performed with two types of aerosols, bacterial (e.g., Bacillus subtilis spores or vegetative cells, and Pseudomonas fluorescens) and non-bacterial (e.g., NaCl, latex, peptone water, and nutrient agar/broth). To control viability of airborne bacteria, the bioaerosols were simultaneously sampled with the AGI-30 impingers. The study has demonstrated the UVAPS cross-sensitivity to the non-bacterial organic materials and the need for careful preparation (washing) of test bacteria, in order to avoid the interference with the fluorescence signals of nutrient media used to grow bacteria. The results were indicative of strong sensitivity of the UVAPS to the type of airborne bacteria. The limitations in the capability of the UVAPS to measure bacterial spores were also found. Counting efficiency of the fluorescent particles was shown to depend on particle concentration with the upper limit of detection of the UVAPS approximately 6×107 particles/m3.

Item Type:Article
Additional Information:Crown copyright
Keywords:AEROSOLS BACILLUS subtilis Bacterial aerosols Real-time monitoring Intrinsic fluorescence Performance evaluation
Subjects:Science > Microbiology > Bacteria
Agriculture > Agriculture (General) > Agriculture and the environment
Deposited On:30 Jan 2018 01:16
Last Modified:30 Jan 2018 02:30

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