Fast determination of methyl chloride and methyl bromide emissions from dried plant matter and soil samples using HS-SPME and GC-MS: method and first results

Yassaa, Noureddine; Wishkerman, Asher; Keppler, Frank; Williams, Jonathan

doi:10.1071/en09034

Cited by 21 publications

(18 citation statements)

References 23 publications

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“…In addition to the articles mentioned so far, this issue of Environmental Chemistry contains eight papers covering some aspect of speciation. [6][7][8][9][10][11][12][13] This high percentage is consistent with Environmental Chemistry's focus on understanding chemical processes, particularly at compartmental interfaces where speciation plays such a major role in influencing transport and biological uptake.…”

supporting

confidence: 63%

The role of speciation in environmental chemistry and the case for quality criteria

Batley¹,

Francesconi²,

Maher³

2009

Environ. Chem.

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supporting

confidence: 63%

The role of speciation in environmental chemistry and the case for quality criteria

Batley¹,

Francesconi²,

Maher³

2009

Environ. Chem.

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“…Calibration data and graphs are often missing from published research using SPME, but nonzero intercepts have been reported by the manufacturer for a range of analytes using the external standard approach (Supelco ). Additionally, calibrations for derivatized amines (Parshintsev et al ) and methylhalides (Yassaa et al ) pre‐concentrated by SPME also yielded nonzero intercepts.…”

Section: Assessment and Discussionmentioning

confidence: 99%

Measurement of methylamines in seawater using solid phase microextraction and gas chromatography

Cree

Airs

Archer

et al. 2018

Limnology & Ocean Methods

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The methylamines form part of the marine organic nitrogen pool. Although they are ubiquitous in marine systems, little is known about their distribution, production, and fate in the marine environment. Analytical methods have been developed for their analysis in marine waters, but these have employed custom‐made apparatus, limiting data to a few studies. Here, we report a method developed for the determination of methylamines in seawater which combines headspace solid phase microextraction (SPME) and gas chromatography with selective nitrogen detection. Gaseous methylamines were pre‐concentrated from water samples (∼ 1 L) heated to 60 °C, onto a polydimethylsiloxane/divinylbenzene SPME fiber located in the headspace of the extraction flask. The analytes were then thermally desorbed from the fiber in a gas chromatograph containing a CP‐Volamine column and a nitrogen–phosphorus detector. The method was routinely calibrated down to 1 nM for all three analytes using matrix‐matched external standards. Limits of detection were determined operationally and ranged from 0.4 nM to 2.9 nM during two sampling campaigns. The analytes were detected in seawater samples from the English Channel and Southern Ocean where concentrations up to 20 nM and 5.6 nM were measured, respectively, consistent with previously reported levels. We propose this method for the analysis of methylamines, and other low‐molecular weight amines, as it is sensitive, robust, and the necessary equipment is widely available.

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“…[38] Although the net emissions from acidic Lake Orr sediments are one order of magnitude lower than from Lake Strawbridge, concentrations found in our microcosm experiments are above the atmospheric background concentrations for all detected halogenated hydrocarbons. [39][40][41][42][43] This emphasises the importance of salt lakes and their sediments in the global budgets of halogenated hydrocarbons. Particularly as atmospheric concentrations of many halogenated hydrocarbons (e.g.…”

Section: Discussionmentioning

confidence: 99%

Halogenated hydrocarbon formation in a moderately acidic salt lake in Western Australia – role of abiotic and biotic processes

et al. 2015

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Environmental context. Volatile halogenated organic compounds (VOX) contribute to ozone depletion and global warming. Here we demonstrate that acidic salt lake sediments in Western Australia contribute to the global natural emission of these compounds and that the emissions are primarily of biotic origin. Elucidating major sources and sinks of VOX is a key task in environmental chemistry because their formation and degradation have major effects on atmospheric chemistry and thus earth climate.Abstract. Volatile organohalogen compounds (VOX) are known environmental pollutants and contribute to stratospheric ozone depletion. Natural formation of VOX has been shown for many environments from the deep sea to forest soils and Antarctica. Recently, we showed that VOX are emitted from pH-neutral salt lakes in Western Australia and that they are mainly of biotic origin. To which extent this biotic organohalogen formation in salt lakes is pH-dependent and whether VOX are also formed under acidic conditions are unknown. Therefore, we quantified VOX emissions from an acidic salt lake in Western Australia (Lake Orr) in biotic and abiotic (g ray-irradiated) microcosm experiments under controlled laboratory conditions. The experiments revealed that biotic halogenation processes also occurred under acidic conditions (pH range 3.8-4.8), though the emissions were approximately one order of magnitude lower (nanogram per kilogram dry sediment range) than from pH-neutral lake sediments. Among the detected substances were brominated, e.g. tribromomethane, as well as chlorinated compounds (e.g. trichloromethane). The addition of lactate and acetate, and ferrihydrite showed no stimulation of VOX formation in our microcosms. Hence, the stimulation of Fe-metabolising microorganisms and their potential effect on the formation of reactive Fe species did not promote VOX emissions, suggesting a direct enzymatic formation of the emitted compounds.

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Fast determination of methyl chloride and methyl bromide emissions from dried plant matter and soil samples using HS-SPME and GC-MS: method and first results

Cited by 21 publications

References 23 publications

The role of speciation in environmental chemistry and the case for quality criteria

The role of speciation in environmental chemistry and the case for quality criteria

Measurement of methylamines in seawater using solid phase microextraction and gas chromatography

Halogenated hydrocarbon formation in a moderately acidic salt lake in Western Australia – role of abiotic and biotic processes

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