This study describes the odour and compounds formation in different industry sectors. Exposes methods for odour characterization and impact assessment, recommending dynamic olfactometry according to EN-13725 combined with high resolution chemical analysis, dispersion modelling or direct exposure measurements by field inspections (VDI3940).
E. Pagans1, W. Murguia, R. Arias, A. van Harreveld
1epagans@odournet.com (Estel·la Pagans).
Parc de Recerca UAB, Edificio EUREKA Espacio P2M2, 08193 Bellaterra.
Tel: 935 929 048 Barcelona. (www.odournet.com)
Competing interests: The author has declared that no competing interests exist.
Academic editor: Carlos N Díaz.
Content quality: This paper has been peer reviewed by at least two reviewers. See scientific committee here
Citation: E. Pagans, W. Murguia, R. Arias, A. van Harreveld, 2014, Odour formation and emissions: characterisation and impact assessment., Ist International Seminar of Odours in the Environment, Santiago, Chile, www.olores.org
Copyright: 2015 olores.org. Open Content Creative Commons license., It is allowed to download, reuse, reprint, modify, distribute, and/or copy articles in olores.org website, as long as the original authors and source are cited. No permission is required from the authors or the publishers.
Keyword: EN13725, GC-TOFMS, VDI/DIN3940, Odourmap
Abstract
This study describes the odour and compounds formation in different industry sectors. Exposes methods for odour characterization and impact assessment, recommending dynamic olfactometry according to EN-13725 combined with high resolution chemical analysis, dispersion modelling or direct exposure measurements by field inspections (VDI3940). It also raises direct interaction between citizens, administrators and plant operators for managing odour impacts.
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The management of odours caused by industrial emissions requires standarized and technically-proved methodologies for a correct diagnosis, allowing to assess the problem objectively and, therefore, for proposing the best solutions from an economical and technical point of view.
Knowing the chemical composition of an air sample is a complex challenge because the abundance of substances of different nature and different concentrations. This complexity increases if we want to identify those compounds that cause odors, since many of them are present at very low concentrations, hardly detectable by more conventional instrumental systems. Gas Chromatography (GC) coupled at Mass Spectrometry (MS) GC-MS, is undoubtedly the more robust and consolidated technique in air sample analysis. The more common types of GC-MS are Mass Spectrometers with single quadrupole detector. However, the continuous technological development of analytical instrumentation and especially in Mass Spectrometry allows ever more robust analyses, more sensitive and with improved resolution. In recent years, the interest in GC-TOFMS systems (TOF: time-of-flight) has been increasing, because it involves a faster detector with higher sensitivity and resolution compared to the conventional single quadrupole GC-MS. This paper compares a GCO-TOFMS system recently acquired by Odournet to a more conventional GC-MS quadropolemethod. Both used thermal desorption (TD) for the chemical and sensory analysis of air samples collected in the output of biofilters. The presented results show a clear difference in terms of sensitivity and resolution for GC-TOFMS compared to a conventional GC-MS identifying almost50% more compounds in the same air sample. Additionally an analysis using GCO (GC-sniffing) was performed, showing good complementarity with the results obtained by GC-TOFMS for the same sample.