Determination of biogenic volatile organic compounds in a rural atmosphere (Valdejero Natural Park)
DOI:
https://doi.org/10.24054/aaas.v4i1.2012Keywords:
COV, monoterpenes, identification, response factor, eventsAbstract
Knowledge about the composition of volatile organic compounds in rural areas is minimal compared to urban or industrial areas. Determining this composition is a topical issue, given the high potential emission of biogenic compounds and the scarcity of local sources of anthropogenic compounds in these areas, many of which are toxic and carcinogenic.
Paraffins are the main compounds in this environment, followed by olefins, with more than 30 compounds having minimum and average values below the detection limit of the analytical equipment, which is characteristic of an area with low anthropogenic activity.
Paraffins are the most abundant compounds in this environment, followed by olefins, with more than 30 compounds showing minimum and average values below the detection limit of the analytical equipment, which is characteristic of a rural background area. During this period, concentrations of anthropogenic compounds have decreased due to the decline in industrial activity in the surrounding area.
However, certain incidents with slightly higher than usual concentrations reflect the importance of local traffic, human intervention, and atmospheric transport phenomena such as polluted air masses.
The concentrations of biogenic organic compounds have remained constant over the years, with monoterpenes being the most abundant in Valderejo during the summer (May-August). Monoterpenes elute in three chromatographic signals, which originate from their reaction to high temperatures within the system. Correct identification was carried out with the support of a GC-MS gas chromatograph with mass spectrophotometer, installed at the ETSI in Bilbao, using the mass spectrum and retention index of each individual compound as tools.
individual.
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