Solid-phase microextraction (SPME) for determination of geosmin and 2-methylisoborneol in volatile emissions from soil disturbance

Conrady, Morgan W.; Bauer, Markus; Jo, Kyoo Dong; Busby, Ryan R.

doi:10.1016/j.chemosphere.2021.131333

Cited by 9 publications

(15 citation statements)

References 30 publications

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“…64 They also found that the concentration of both compounds more than doubled following physical agitations to the soil. 64 If the vapor pressure of 2-MIB or GSM prevented their evaporation at the water−air interface, physical disturbances from wave action or recreational activities leading to lake spray aerosol could also modulate the atmospheric reactions, leading to our tentatively identified SOA tracers. However, our study design did not consider any indicators of spray aerosol, and this speculation is subject to further research.…”

Section: Discussionmentioning

confidence: 96%

“…Reactions with NO x are expected to be a major oxidation pathway during typical daytime conditions in the Central Valley of California, 115 These findings agree with Conrady et al, who determined that 2-MIB emissions from disturbed soil were 10 times higher when compared to GSM. 64 They also found that the concentration of both compounds more than doubled following physical agitations to the soil. 64 If the vapor pressure of 2-MIB or GSM prevented their evaporation at the water−air interface, physical disturbances from wave action or recreational activities leading to lake spray aerosol could also modulate the atmospheric reactions, leading to our tentatively identified SOA tracers.…”

Section: Discussionmentioning

confidence: 96%

“…Ultimately, the precise ecological triggers of 2-MIB and GSM production are unknown . However, 2-MIB and GSM are elevated during late spring through early fall when CHABs occur and are linked to periods with heightened nutrient concentrations. ,,, Concentrations of both compounds in eutrophic waterbodies range from <10 to >1000 ng L –1 , with averages ∼10 ng L –1 . , To date, only one study has reported ambient concentrations of airborne 2-MIB and GSM, which ranged from 0.16 to 0.31 μg L –1 and 0.01 to 0.25 μg L –1 in the airspace above soils, respectively . These VOCs share many structural characteristics with terpenoids such as α-pinene and camphor, two well documented precursors to vapor pressure-driven SOA. − To investigate aerosol formation as one transformation pathway for GSM and 2-MIB emissions, we oxidized GSM and 2-MIB in the gas phase with • OH in a series of experimental aerosol formation experiments.…”

Section: Methodsmentioning

confidence: 99%

“…62,63 To date, only one study has reported ambient concentrations of airborne 2-MIB and GSM, which ranged from 0.16 to 0.31 μg L −1 and 0.01 to 0.25 μg L −1 in the airspace above soils, respectively. 64 These VOCs share many structural characteristics with terpenoids such as α-pinene and camphor, two well documented precursors to vapor pressuredriven SOA. 65−67 To investigate aerosol formation as one transformation pathway for GSM and 2-MIB emissions, we oxidized GSM and 2-MIB in the gas phase with • OH in a series of experimental aerosol formation experiments.…”

Section: Chab-derived Soa Precursormentioning

confidence: 99%

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Secondary Organic Aerosol Formation from Cyanobacterial-Derived Volatile Organic Compounds

Plaas,

Yan,

Christensen

et al. 2023

ACS Earth Space Chem.

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Recent work has demonstrated the primary aerosolization of cyanobacterial cells, toxins, and metabolites from cyanobacterial harmful algal blooms (CHABs). However, another possible source of CHAB-derived aerosols is secondary organic aerosol (SOA) formation via the atmospheric oxidation of volatile organic compounds (VOCs) emitted by CHABs. To examine potential SOA formation from CHABs, two cyanobacterial VOCs2-methylisoborneol (2-MIB) and geosmin (GSM)were oxidized via hydroxyl radicals (•OH) in a potential aerosol mass-oxidation flow reactor. At 100 ppbv, SOA mass yields were 15.1 ± 2% and 33.9 ± 1.3%, from 2-MIB and GSM, respectively. SOA mass concentrations generated from 2-MIB and GSM oxidations reached up to 102 ± 22 μg m–3 and 252 ± 52 μg m–3, respectively, when exposed to 8–16 days of equivalent •OH exposure. Offline molecular-level characterization of Teflon-filter collected SOA by reverse-phase liquid chromatography interfaced to high-resolution quadrupole time-of-flight mass spectrometry equipped with electrospray ionization (RPLC/ESI-HR-QTOFMS) revealed 7 distinct chemical compounds in both 2-MIB and GSM-derived SOA, which we propose for use as molecular tracers of CHAB-derived SOA in ambient fine particulate matter (PM2.5). Two 2-MIB-derived SOA tracers (molecular formulas of C10H18O4 and C10H16O5) were measured in PM2.5 collected from the airshed of a CHAB. To the best of our knowledge, this is the first observation of respirable CHAB-derived SOA. Our findings strengthen the need to consider outcomes related to human respiratory health in risk assessments and public health messaging surrounding residential and recreational exposures to CHABs.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Chab-derived Soa Precursormentioning

confidence: 99%

See 2 more Smart Citations

Secondary Organic Aerosol Formation from Cyanobacterial-Derived Volatile Organic Compounds

Plaas,

Yan,

Christensen

et al. 2023

ACS Earth Space Chem.

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“…Also, it considerably reduces the possibility of the decomposition and loss of heat-sensitive compounds during the extraction. This technique is used in a wide variety of fields, ranging from food ( Mohammadhosseini et al, 2017 ), environment ( Conrady et al, 2021 ), agriculture ( Mohammadhosseini, 2015b ), and medicine ( Świądro-Piętoń et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Antifungal activity of the volatile organic compounds produced by Ceratocystis fimbriata strains WSJK-1 and Mby

Gao

Ren²,

ShuQi³

et al. 2022

Front. Microbiol.

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Microorganism-produced volatile organic compounds (VOCs) are considered promising environmental-safety fumigants in food preservation. In this study, the VOCs from fungal Ceratocystis fimbriata strains (WSJK-1, Mby) were tested against postharvest fungi Monilinia laxa, Fusarium oxysporum, Monilinia fructicola, Botrytis cinerea, Alternaria solani, and Aspergillus flavus in vitro. The mycelial growth was significantly inhibited, in particular M. fructicola and B. cinerea (76.95, 76.00%), respectively. VOCs were identified by headspace solid-phase microextraction coupled with Gas Chromatography–Mass Spectrometry (HS-SPME-GC–MS); 40 compounds were identified. The antifungal activity of 21 compounds was tested by the minimum inhibitory concentrations (MIC) value. Benzaldehyde, 2-Phenylethanol, and 1-Octen-3-ol showed strong antifungal activity with the MIC in vitro ranging from 0.094 to 0.284 ml L−1 depending on the pathogen tested. The optical microscope showed serious morphological damage, including cell deformation, curling, collapse, and deficiency in mycelial or conidia cell structures treated with C. fimbriata VOCs and pure compounds. In vivo tests, C. fimbriata VOCs decreased brown rot severity in peaches, and compounds Benzaldehyde and 2-Phenylethanol could reduce peach brown rot in peaches at 60 μl L−1. The VOCs produced by C. fimbriata strain have good antifungal effects; low concentration fumigation could control peach brown rot. Its fragrance is fresh, safe, and harmless, and it is possible to replace chemical fumigants. It could be used as a potential biofumigant to control fruit postharvest transportation, storage, and food preservation. To the best of our knowledge, this is the first report on the antifungal activity and biocontrol mechanism of VOCs produced by C. fimbriata.

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Human Scent Dynamics—Combining Theory and Practice in Locating People

Schoon,

Moore

2023

Olfactory Research in Dogs

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Solid-phase microextraction (SPME) for determination of geosmin and 2-methylisoborneol in volatile emissions from soil disturbance

Cited by 9 publications

References 30 publications

Secondary Organic Aerosol Formation from Cyanobacterial-Derived Volatile Organic Compounds

Secondary Organic Aerosol Formation from Cyanobacterial-Derived Volatile Organic Compounds

Antifungal activity of the volatile organic compounds produced by Ceratocystis fimbriata strains WSJK-1 and Mby

Human Scent Dynamics—Combining Theory and Practice in Locating People

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