Volatile Compounds
Volatile Compounds - Related Videos
09:19
Capturing Actively Produced Microbial Volatile Organic Compounds from Human-Associated Samples with Vacuum-Assisted Sorbent Extraction
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Cited by 2 •
2022
This protocol describes the extraction of volatile organic compounds from a biological sample with the vacuum-assisted sorbent extraction method, gas chromatography coupled with mass spectrometry using the Entech Sample Preparation Rail, and data analysis. It also describes culture of biological samples and stable isotope probing.
05:29
Profiling Volatile Compounds in Blackcurrant Fruit using Headspace Solid-Phase Microextraction Coupled to Gas Chromatography-Mass Spectrometry
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Cited by 7 •
2021
A headspace solid-phase microextraction-gas-chromatography platform is described here for fast, reliable, and semi-automated volatile identification and quantification in ripe blackcurrant fruits. This technique can be used to increase knowledge about fruit aroma and to select cultivars with enhanced flavor for the purpose of breeding.
08:10
Fizzy Extraction of Volatile Organic Compounds Combined with Atmospheric Pressure Chemical Ionization Quadrupole Mass Spectrometry
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Cited by 16 •
2017
Fizzy extraction is a new laboratory technique for analysis of volatile and semivolatile compounds. A carrier gas is dissolved in the liquid sample by applying overpressure and stirring the sample. The sample chamber is then decompressed. The analyte species are liberated to the gas phase due to effervescence.
11:02
Fruit Volatile Analysis Using an Electronic Nose
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Cited by 10 •
2012
A rapid method for volatile compound analysis in fruit is described. The volatile compounds present in the headspace of a homogenate of the sample are rapidly separated and detected with ultra-fast gas chromatography (GC) coupled with a surface acoustic wave (SAW) sensor. A procedure for data handling and analysis is also discussed.
10:28
Herbivore-induced Blueberry Volatiles and Intra-plant Signaling
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Cited by 3 •
2011
A push-pull method for collecting plant volatiles is described. The method allows for a comparison of volatiles induced by herbivore feeding, exogenous methyl jasmonate, and mechanical damage. This technique is also used to investigate the volatile response of undamaged branches to exposure to volatiles from herbivore-damaged branches within blueberry plants.
FAQs
Temperature strongly changes how readily a volatile compound leaves a liquid. As temperature rises, vapor pressure generally increases, so more molecules enter the gas phase; boiling point provides a related indication of the temperature at which vapor formation becomes especially significant. This relationship helps chemists anticipate evaporation during handling, storage, and analysis.
The strength of intermolecular forces helps explain differences in volatility among substances. Weaker attractions make it easier for molecules to escape a liquid, whereas stronger attractions hinder that escape. Boiling point and vapor pressure therefore provide complementary ways to consider the same behavior: one reflects temperature needed for vigorous vapor formation, while the other indicates the tendency to enter the gas phase under specified conditions.
Volatility links molecular behavior to practical chemical consequences. Because a substance can move quickly from liquid to gas, its evaporation influences exposure, air quality, storage, and laboratory safety. The same property also helps explain why volatile compounds appear in atmospheric emissions and why controlling temperature and handling conditions matters when working with them.
Gas chromatography is used to identify and quantify volatile-compound components in complex mixtures. It is therefore valuable when a sample contains several substances and the analyst needs information about both composition and amount. In chemistry, the method turns volatility into a practical basis for examining mixture constituents.
Volatile compounds occur in fragrances, flavors, fuels, and solvents. In these settings, their readiness to enter the gas phase is part of why volatility matters to product function and handling. The same property that supports practical uses can also increase evaporation, making storage and exposure important considerations.
In environmental chemistry, volatile compounds are relevant because their rapid evaporation can contribute to atmospheric emissions. Their presence in the gas phase connects chemical composition with air-quality concerns, while vapor pressure and temperature help determine how readily release occurs. This makes volatility useful when considering emissions alongside laboratory and industrial handling.