Analysis of Trace‐Level Volatile Compounds in Fresh Turf Crop (<i>Lolium perenne</i> L.) by Gas Chromatography Quadrupole Time‐of‐Flight Mass Spectrometry

Hong, Saisai; Kang, Wenyu; Su, Yue; Guo, Yinlong

doi:10.1002/cjoc.201300414

Cited by 15 publications

(8 citation statements)

References 34 publications

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“…For static HS‐GC, the conversion of water into a solid crystalline hydrate form using appropriate hygroscopic salts was a usual method to reduce the amount of water transferred to the column . This method was insufficient for removing large amounts of water vapor from high‐water‐content‐samples .…”

Section: Introductionmentioning

confidence: 99%

Determination of highly volatile compounds in fresh onion (Allium cepa L.) by room‐temperature enrichment headspace‐trap coupled to cryotrapping GC–MS

Liu

Guo

2018

Separation Science Plus

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Conventional headspace‐based analysis is not suitable for identifying volatile compounds in fresh onion (Allium cepa L.) because large amounts of water vapor could affect the determination of target compounds. A headspace‐trap was introduced to remove water vapor and keep the analytes in the trap tube. Additionally, the headspace‐trap method based on room‐temperature enrichment could prevent enzyme‐sensitive samples from denaturing to maintain the original flavor compositions of the samples. Moreover, the highly volatile compounds were poorly separated after headspace extraction. By using a cryotrapping device, these compounds were well separated. Therefore, a room‐temperature enrichment headspace‐trap cryotrapping gas chromatography with mass spectrometric method was established for the determination of volatile compounds in fresh onion. With this method, a total of 73 volatile compounds were identified by mass spectral search and retention index. Among them, 29 highly volatile compounds were successfully separated before the retention time of 5 min, and these compounds contributed significantly to the smell of onion. The volatile compounds were dominated by dipropyl disulfide (35.42%), 1,2‐dithiolane (15.82%), 1‐propanethiol (11.74%) and propanal (11.23%). The results indicated that the proposed method was an effective tool for analyzing volatile compounds in high‐water‐content fresh onion samples.

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Section: Introductionmentioning

confidence: 99%

Determination of highly volatile compounds in fresh onion (Allium cepa L.) by room‐temperature enrichment headspace‐trap coupled to cryotrapping GC–MS

Liu

Guo

2018

Separation Science Plus

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“…The most abundant VOCs in fresh L. perenne have been reported as benzeneacetaldehyde, 2,5-dimethyl-pyrazine, hexanal and benzaldehyde 91 . Of these four, all but 2,5-dimethyl-pyrazine were detectable in the present samples, indicating that grass volatiles could be clearly distinguished in the rumen.…”

Section: Discussionmentioning

confidence: 99%

Forage grass growth under future climate change scenarios affects fermentation and ruminant efficiency

Hart

Christofides

Davies

et al. 2022

Sci Rep

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With an increasing human population access to ruminant products is an important factor in global food supply. While ruminants contribute to climate change, climate change could also affect ruminant production. Here we investigated how the plant response to climate change affects forage quality and subsequent rumen fermentation. Models of near future climate change (2050) predict increases in temperature, CO2, precipitation and altered weather systems which will produce stress responses in field crops. We hypothesised that pre-exposure to altered climate conditions causes compositional changes and also primes plant cells such that their post-ingestion metabolic response to the rumen is altered. This “stress memory” effect was investigated by screening ten forage grass varieties in five differing climate scenarios, including current climate (2020), future climate (2050), or future climate plus flooding, drought or heat shock. While varietal differences in fermentation were detected in terms of gas production, there was little effect of elevated temperature or CO2 compared with controls (2020). All varieties consistently showed decreased digestibility linked to decreased methane production as a result of drought or an acute flood treatment. These results indicate that efforts to breed future forage varieties should target tolerance of acute stress rather than long term climate.

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“…More than 50 compounds were identified in fresh turf crop using classical way, from which benzeneacetaldehyde; 2,5‐dimethyl pyrazine; hexanal; and benzaldehyde showed the highest peak areas. Additionally, camphene and 2,4‐dimethylbenzaldehyde were identified using target MS approach . Similarly, classical and post‐target method based on GC–QHRTOF–MS was used for identification of volatile compounds in Fructus Amomi .…”

Section: Food Analysismentioning

confidence: 99%

Recent applications of gas chromatography with high‐resolution mass spectrometry

S̆pánik¹,

Machyňáková²

2017

J of Separation Science

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Gas chromatography coupled to high-resolution mass spectrometry is a powerful analytical method that combines excellent separation power of gas chromatography with improved identification based on an accurate mass measurement. These features designate gas chromatography with high-resolution mass spectrometry as the first choice for identification and structure elucidation of unknown volatile and semivolatile organic compounds. Gas chromatography with high-resolution mass spectrometry quantitative analyses was previously focused on the determination of dioxins and related compounds using magnetic sector type analyzers, a standing requirement of many international standards. The introduction of a quadrupole high-resolution time-of-flight mass analyzer broadened interest in this method and novel applications were developed, especially for multi-target screening purposes. This review is focused on the development and the most interesting applications of gas chromatography coupled to high-resolution mass spectrometry towards analysis of environmental matrices, biological fluids, and food safety since 2010. The main attention is paid to various approaches and applications of gas chromatography coupled to high-resolution mass spectrometry for non-target screening to identify contaminants and to characterize the chemical composition of environmental, food, and biological samples. The most interesting quantitative applications, where a significant contribution of gas chromatography with high-resolution mass spectrometry over the currently used methods is expected, will be discussed as well. K E Y W O R D Saccurate mass measurement, environmental analysis, gas chromatography, high-resolution mass spectrometry, pesticide residues

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Analysis of Trace‐Level Volatile Compounds in Fresh Turf Crop (Lolium perenne L.) by Gas Chromatography Quadrupole Time‐of‐Flight Mass Spectrometry

Cited by 15 publications

References 34 publications

Determination of highly volatile compounds in fresh onion (Allium cepa L.) by room‐temperature enrichment headspace‐trap coupled to cryotrapping GC–MS

Determination of highly volatile compounds in fresh onion (Allium cepa L.) by room‐temperature enrichment headspace‐trap coupled to cryotrapping GC–MS

Forage grass growth under future climate change scenarios affects fermentation and ruminant efficiency

Recent applications of gas chromatography with high‐resolution mass spectrometry

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