Determination of individual biogenic volatile organic compounds in the atmosphere at short time intervals by a combination of in-situ continuous sampling using wet diffusion denuder and off-line laboratory analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F26%3A0200533" target="_blank" >RIV/00216305:26310/26:0200533 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.aca.2025.345002" target="_blank" >https://doi.org/10.1016/j.aca.2025.345002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.aca.2025.345002" target="_blank" >10.1016/j.aca.2025.345002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of individual biogenic volatile organic compounds in the atmosphere at short time intervals by a combination of in-situ continuous sampling using wet diffusion denuder and off-line laboratory analysis

Popis výsledku v původním jazyce

Background: Biogenic volatile organic compounds (BVOCs) play a key role in atmospheric chemistry and air quality. Accurate quantification of individual BVOCs remains challenging due to their volatility and reactivity in atmosphere. In this study, a wet diffusion denuder used for the continuous sampling of BVOCs into an absorption liquid was evaluated under controlled laboratory conditions in order to determine the collection efficiencies for a large number of BVOCs. All samples with collected BVOCs were offline analysed using gas chromatography with mass spectrometry. Results: The influence of denuder temperature, air flow rate, relative humidity, type of absorption liquid, and liquid flow rate was systematically investigated. Optimal conditions for field application were selected as a denuder temperature of 20 degrees C, an air flow rate of 500 mL/min, n-heptane as the absorption liquid, and a liquid flow rate of 0.40 mL/min. Under these conditions, collection efficiencies for most BVOCs exceeded 89 %. Field sampling conducted at two contrasting sites, an agricultural location and a spruce forest, confirmed the applicability of the method and highlighted large differences in monoterpene concentrations between environments. A connection of denuder output with automatic sample collector enables long-term fully automatic sampling of BVOCs in the air at short time intervals. The temporal resolution sampling allows the study of rapid changes in BVOC concentrations in the air. Significance: A key advantage of the method is that it minimizes the exposure of captured BVOCs in an absorption liquid (n-heptane) to airborne oxidants, thereby reducing the risk of photochemical reaction with air oxidants during sampling, and also the determination of the concentration of individual BVOCs using off-line gas chro-matography with mass spectrometry analysis.

Název v anglickém jazyce

Determination of individual biogenic volatile organic compounds in the atmosphere at short time intervals by a combination of in-situ continuous sampling using wet diffusion denuder and off-line laboratory analysis

Popis výsledku anglicky

Background: Biogenic volatile organic compounds (BVOCs) play a key role in atmospheric chemistry and air quality. Accurate quantification of individual BVOCs remains challenging due to their volatility and reactivity in atmosphere. In this study, a wet diffusion denuder used for the continuous sampling of BVOCs into an absorption liquid was evaluated under controlled laboratory conditions in order to determine the collection efficiencies for a large number of BVOCs. All samples with collected BVOCs were offline analysed using gas chromatography with mass spectrometry. Results: The influence of denuder temperature, air flow rate, relative humidity, type of absorption liquid, and liquid flow rate was systematically investigated. Optimal conditions for field application were selected as a denuder temperature of 20 degrees C, an air flow rate of 500 mL/min, n-heptane as the absorption liquid, and a liquid flow rate of 0.40 mL/min. Under these conditions, collection efficiencies for most BVOCs exceeded 89 %. Field sampling conducted at two contrasting sites, an agricultural location and a spruce forest, confirmed the applicability of the method and highlighted large differences in monoterpene concentrations between environments. A connection of denuder output with automatic sample collector enables long-term fully automatic sampling of BVOCs in the air at short time intervals. The temporal resolution sampling allows the study of rapid changes in BVOC concentrations in the air. Significance: A key advantage of the method is that it minimizes the exposure of captured BVOCs in an absorption liquid (n-heptane) to airborne oxidants, thereby reducing the risk of photochemical reaction with air oxidants during sampling, and also the determination of the concentration of individual BVOCs using off-line gas chro-matography with mass spectrometry analysis.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2026

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Analytica Chimica Acta

ISSN

0003-2670

e-ISSN

1873-4324

Svazek periodika

1385

Číslo periodika v rámci svazku

1 February 2026

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

001639948000001

EID výsledku v databázi Scopus

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