gas chromatography: meaning, definition, pronunciation and examples
C2Technical/Scientific
Quick answer
What does “gas chromatography” mean?
A laboratory technique for separating and analysing chemical compounds in a mixture, where a gas carries the mixture through a column containing a stationary phase.
Audio
Pronunciation
Definition
Meaning and Definition
A laboratory technique for separating and analysing chemical compounds in a mixture, where a gas carries the mixture through a column containing a stationary phase.
A ubiquitous analytical method in chemistry, forensics, environmental science, and pharmaceuticals. It can also refer to the specific equipment used (the gas chromatograph) or the resulting graphical data (a chromatogram). The term can function as a noun phrase or be used attributively.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Terminology around hyphenation may vary slightly (e.g., 'gas-chromatography' vs 'gas chromatography'), but the open compound is standard in both varieties in scientific literature.
Connotations
None. The term is strictly technical and neutral in both varieties.
Frequency
Equally frequent and standard in scientific contexts in both the UK and US.
Grammar
How to Use “gas chromatography” in a Sentence
Analysis was performed USING gas chromatography.The mixture was analysed BY gas chromatography.We APPLIED gas chromatography TO the sample.Gas chromatography WAS USED to separate the components.Gas chromatography-mass spectrometry (GC-MS) is a common HYPHENATED technique.Vocabulary
Collocations
Examples
Examples of “gas chromatography” in a Sentence
adjective
British English
- The gas chromatography results were conclusive.
- We need a new gas chromatography column.
American English
- The gas chromatography data confirmed the finding.
- A gas chromatography system was installed.
Usage
Meaning in Context
Business
Potentially used in quality control, pharmaceuticals, or petrochemical industry reports (e.g., 'Our QC relies on rigorous gas chromatography.').
Academic
The primary context. Found in chemistry, biochemistry, environmental science, and forensic science research papers and textbooks (e.g., 'Metabolites were identified by gas chromatography.').
Everyday
Virtually never used. Might appear in news articles about forensic science or environmental testing.
Technical
The dominant register. Used precisely to describe a specific analytical method, its parameters, and results.
Vocabulary
Synonyms of “gas chromatography”
Strong
Neutral
Weak
Vocabulary
Antonyms of “gas chromatography”
Watch out
Common Mistakes When Using “gas chromatography”
- Incorrect hyphenation or spelling: 'gaschromatography', 'gas-chromatography' (less common).
- Using it as a verb (e.g., 'We gas chromatographed the sample' is highly non-standard; preferred: 'We analysed the sample by gas chromatography.').
- Confusing it with 'paper chromatography', a simpler technique.
FAQ
Frequently Asked Questions
Yes, it's a noun-noun compound. The first noun ('gas') modifies the second ('chromatography'), specifying the type of mobile phase used.
GC (Gas Chromatography) uses a gas mobile phase for volatile compounds. HPLC (High-Performance Liquid Chromatography) uses a liquid mobile phase and can analyse a broader range of compounds, including non-volatile ones.
No, it is strictly a noun (phrase). The verb form ('to chromatograph') is rare and jargonistic. Standard usage is 'to analyse by gas chromatography' or 'to perform gas chromatography on'.
The detector at the end of the column identifies and quantifies the separated chemical components as they exit, converting the chemical signal into an electrical one to produce a chromatogram.
A laboratory technique for separating and analysing chemical compounds in a mixture, where a gas carries the mixture through a column containing a stationary phase.
Gas chromatography is usually technical/scientific in register.
Gas chromatography: in British English it is pronounced /ˌɡæs ˌkrəʊ.məˈtɒɡ.rə.fi/, and in American English it is pronounced /ˌɡæs ˌkroʊ.məˈtɑː.ɡrə.fi/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None. The term is strictly technical.”
Learning
Memory Aids
Mnemonic
Imagine a race where different chemical compounds (the runners) are carried by a stream of gas (the track) through a long, winding column. The ones that interact most with the column's lining (the stationary phase) finish last, allowing them to be identified as they cross the finish line (the detector).
Conceptual Metaphor
CHROMATOGRAPHY IS A RACE / CHROMATOGRAPHY IS A JOURNEY (compounds travel and separate based on their affinity for the path vs. the surroundings).
Practice
Quiz
What is the primary function of the 'carrier gas' in gas chromatography?