Evaluation of a Passive Sampling Method for Long-Term Continuous Monitoring of Volatile Organic Compounds in Urban Environments

2018 ◽  
Vol 52 (18) ◽  
pp. 10580-10589 ◽  
Author(s):  
Robert M. Healy ◽  
Julie Bennett ◽  
Jonathan M. Wang ◽  
Nicholas S. Karellas ◽  
Colman Wong ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Continuous Monitoring ◽  
Passive Sampling ◽  
Sampling Method ◽  
Urban Environments ◽  
Volatile Organic

scholarly journals Passive Sampling Method for Total Volatile Organic Compounds in Indoor Air

2018 ◽  
Vol 21 (1) ◽  
pp. 41-49
Author(s):  
Takahiro ISHIZAKA ◽  
Ayato KAWASHIMA ◽  
Naoki HISHIDA ◽  
Noriaki HAMADA
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Indoor Air ◽  
Passive Sampling ◽  
Sampling Method ◽  
Total Volatile ◽  
Volatile Organic ◽  
Total Volatile Organic Compounds

scholarly journals Development of a Water Matrix Certified Reference Material for Volatile Organic Compounds Analysis in Water

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4370
Author(s):  
Liping Fang ◽  
Linyan Huang ◽  
Gang Yang ◽  
Yang Jiang ◽  
Haiping Liu ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Reference Material ◽  
Organic Compounds ◽  
Certified Reference Material ◽  
Pure Water ◽  
Term Stability ◽  
Long Term Stability ◽  
Water Matrix ◽  
Volatile Organic

Water matrix certified reference material (MCRM) of volatile organic compounds (VOCs) is used to provide quality assurance and quality control (QA/QC) during the analysis of VOCs in water. In this research, a water MCRM of 28 VOCs was developed using a “reconstitution” approach by adding VOCs spiking, methanol solution into pure water immediately prior to analysis. The VOCs spiking solution was prepared gravimetrically by dividing 28 VOCs into seven groups, then based on ISO Guide 35, using gas chromatography-mass spectrometry (GC-MS) to investigate the homogeneity and long-term stability. The studies of homogeneity and long-term stability indicated that the batch of VOCs spiking solution was homogeneous and stable at room temperature for at least 15 months. Moreover, the water MCRM of 28 VOCs was certified by a network of nine competent laboratories, and the certified values and expanded uncertainties of 28 VOCs ranged from 6.2 to 17 μg/L and 0.5 to 5.3 μg/L, respectively.

scholarly journals Root anoxia effects on physiology and emissions of volatile organic compounds (VOC) under short- and long-term inundation of trees from Amazonian floodplains

SpringerPlus ◽  
2012 ◽  
Vol 1 (1) ◽  
pp. 9 ◽  
Author(s):  
Araceli Bracho-Nunez ◽  
Nina Knothe ◽  
Wallace R Costa ◽  
Liberato R Maria Astrid ◽  
Betina Kleiss ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Volatile Organic ◽  
Short And Long Term

Sprayed liquid–gas extraction of semi-volatile organophosphate malathion from air and contaminated surfaces

2018 ◽  
Vol 10 (21) ◽  
pp. 2503-2511 ◽  
Author(s):  
Mashaalah Zarejousheghani ◽  
Andreas Walte ◽  
Helko Borsdorf
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Sampling Method ◽  
Air Sampling ◽  
Gas Extraction ◽  
Volatile Organic

In this study, a new air sampling method termed sprayed liquid–gas extraction (SLGE) was developed for semi-volatile organic compounds.

Long-term soil biological fertility, volatile organic compounds and chemical properties in a vineyard soil after biochar amendment

Geoderma ◽  
2019 ◽  
Vol 344 ◽  
pp. 127-136 ◽  
Author(s):  
Laura Giagnoni ◽  
Anita Maienza ◽  
Silvia Baronti ◽  
Francesco Primo Vaccari ◽  
Lorenzo Genesio ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Chemical Properties ◽  
Volatile Organic ◽  
Vineyard Soil ◽  
Biochar Amendment ◽  
And Chemical Properties

Long-term Emission of Volatile Organic Compounds from Waterborne Paints - Methods of Comparison

Indoor Air ◽  
1991 ◽  
Vol 1 (4) ◽  
pp. 562-576 ◽  
Author(s):  
Per A. Clausen ◽  
Peder Wolkoff ◽  
Erik Hoist ◽  
Peter A. Nielsen
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Volatile Organic

scholarly journals Comprehensive organic emission profiles for gasoline, diesel, and gas-turbine engines including intermediate and semi-volatile organic compound emissions

2018 ◽  
Vol 18 (23) ◽  
pp. 17637-17654 ◽  
Author(s):  
Quanyang Lu ◽  
Yunliang Zhao ◽  
Allen L. Robinson
Keyword(s):  
Volatile Organic Compounds ◽  
Gas Turbine ◽  
Organic Compounds ◽  
Cold Start ◽  
Urban Environments ◽  
Particulate Filter ◽  
Published Data ◽  
Source Profiles ◽  
Volatile Organic ◽  
Unburned Fuel

Abstract. Emissions from mobile sources are important contributors to both primary and secondary organic aerosols (POA and SOA) in urban environments. We compiled recently published data to create comprehensive model-ready organic emission profiles for on- and off-road gasoline, gas-turbine, and diesel engines. The profiles span the entire volatility range, including volatile organic compounds (VOCs, effective saturation concentration C*=107–1011 µg m−3), intermediate-volatile organic compounds (IVOCs, C*=103–106 µg m−3), semi-volatile organic compounds (SVOCs, C*=1–102 µg m−3), low-volatile organic compounds (LVOCs, C*≤0.1 µg m−3) and non-volatile organic compounds (NVOCs). Although our profiles are comprehensive, this paper focuses on the IVOC and SVOC fractions to improve predictions of SOA formation. Organic emissions from all three source categories feature tri-modal volatility distributions (“by-product” mode, “fuel” mode, and “lubricant oil” mode). Despite wide variations in emission factors for total organics, the mass fractions of IVOCs and SVOCs are relatively consistent across sources using the same fuel type, for example, contributing 4.5 % (2.4 %–9.6 % as 10th to 90th percentiles) and 1.1 % (0.4 %–3.6 %) for a diverse fleet of light duty gasoline vehicles tested over the cold-start unified cycle, respectively. This consistency indicates that a limited number of profiles are needed to construct emissions inventories. We define five distinct profiles: (i) cold-start and off-road gasoline, (ii) hot-operation gasoline, (iii) gas-turbine, (iv) traditional diesel and (v) diesel-particulate-filter equipped diesel. These profiles are designed to be directly implemented into chemical transport models and inventories. We compare emissions to unburned fuel; gasoline and gas-turbine emissions are enriched in IVOCs relative to unburned fuel. The new profiles predict that IVOCs and SVOC vapour will contribute significantly to SOA production. We compare our new profiles to traditional source profiles and various scaling approaches used previously to estimate IVOC emissions. These comparisons reveal large errors in these different approaches, ranging from failure to account for IVOC emissions (traditional source profiles) to assuming source-invariant scaling ratios (most IVOC scaling approaches).

scholarly journals Physicochemical uptake and release of volatile organic compounds by soil in coated-wall flow tube experiments with ambient air

2019 ◽  
Vol 19 (4) ◽  
pp. 2209-2232 ◽  
Author(s):  
Guo Li ◽  
Yafang Cheng ◽  
Uwe Kuhn ◽  
Rongjuan Xu ◽  
Yudong Yang ◽  
...  
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Atmospheric Chemistry ◽  
Soil Surface ◽  
Ambient Air ◽  
Flow Tube ◽  
Heterogeneous Oxidation ◽  
Volatile Organic ◽  
Wall Flow

Abstract. Volatile organic compounds (VOCs) play a key role in atmospheric chemistry. Emission and deposition on soil have been suggested as important sources and sinks of atmospheric trace gases. The exchange characteristics and heterogeneous chemistry of VOCs on soil, however, are not well understood. We used a newly designed differential coated-wall flow tube system to investigate the long-term variability of bidirectional air–soil exchange of 13 VOCs under ambient air conditions of an urban background site in Beijing. Sterilized soil was investigated to address physicochemical processes and heterogeneous/multiphase reactions independently from biological activity. Most VOCs revealed net deposition with average uptake coefficients (γ) in the range of 10−7–10−6 (referring to the geometric soil surface area), corresponding to deposition velocities (Vd) of 0.0013–0.01 cm s−1 and soil surface resistances (Rc) of 98–745 s cm−1, respectively. Formic acid, however, was emitted at a long-term average rate of ∼6×10-3 nmol m−2 s−1, suggesting that it was formed and released upon heterogeneous oxidation of other VOCs. The soil–atmosphere exchange of one individual VOC species can be affected by both its surface degradation/depletion caused by surface reactions and by competitive uptake or heterogeneous formation/accommodation of other VOC species. Overall, the results show that physicochemical processing and heterogeneous oxidation on soil and soil-derived dust can act as a sink or as a source of atmospheric VOCs, depending on molecular properties and environmental conditions.

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