gas chromatography
nounDefinition of gas chromatography
: chromatography in which the sample mixture is vaporized and injected into a stream of carrier gas (such as nitrogen or helium) moving through a column containing a stationary phase composed of a liquid or particulate solid and is separated into its component compounds according to their affinity for the stationary phase
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Examples of gas chromatography in a Sentence
Recent Examples on the Web
The scientists took 20-milligram samples of the interior and exterior surfaces of nine containers, ground them into powder and subjected them to gas chromatography and mass spectrometry. — Amina Khan, chicagotribune.com, "Ancient drug paraphernalia reveals that people smoked pot in China 2,500 years ago," 26 Aug. 2019 When the sample in question was anything other than plant matter — maybe brownies or a vape pen — labs relied on something called gas chromatography-mass spectrometry to detect THC, without figuring out the exact concentration. — Keri Blakinger, Houston Chronicle, "Four Texas DAs announce shared plan to stop charging low-level pot cases in light of hemp bill," 3 July 2019 That’s where gas chromatography/mass spectrometry (GC/MS to its friends) comes in. — Kiona N. Smith, Ars Technica, "Neanderthals glued their tools together," 2 July 2019 The organic material was examined in a laboratory through a chemical analysis known as gas chromatography - mass spectrometry (GC-MS) that revealed the presence of cannabis with relatively high levels of THC. — Joel Achenbach, Anchorage Daily News, "Archaeologists find signs of ritualized cannabis smoking 2,500 years ago in China," 13 June 2019 To find out what had been burned in them, University of Chinese Academy of Sciences archaeologist Yemin Yang and his colleagues used gas chromatography/mass spectrometry to analyze small samples of the charred wood and the residue from the stones. — Kiona N. Smith, Ars Technica, "Oldest evidence of cannabis smoking found in ancient Chinese cemetery," 12 June 2019 Yang's and Ren's team ground bits of brazier into powder and applied gas chromatography and mass spectrometry to identify chemical compounds left behind. — Andrew Lawler, Science | AAAS, "Oldest evidence of marijuana use discovered in 2500-year-old cemetery in peaks of western China," 12 June 2019 The scientists took 20-milligram samples of the interior and exterior surfaces of nine containers, ground them into powder and subjected them to gas chromatography and mass spectrometry. — Amina Khan, latimes.com, "Ancient drug paraphernalia reveals that people smoked pot in China 2,500 years ago," 12 June 2019 The sophisticated tests now available include gas chromatography mass spectrometry, which can detect minuscule amounts of substance, and was used in missions to Mars. — Erik Lacitis, The Seattle Times, "What a new WSU study tells us about the earliest days of smoking tobacco in the Northwest," 30 Oct. 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gas chromatography.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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