Overview

gas-liquid chromatography


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'gas-liquid chromatography' can also refer to...

gas-liquid chromatography

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gas-liquid chromatography

gas–liquid chromatography

gas–liquid chromatography

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Innovations in High-Pressure Liquid Injection Technique for Gas Chromatography: Pressurized Liquid Injection System

Determination of Organophosphorus Pesticides in Soil by Dispersive Liquid–Liquid Microextraction and Gas Chromatography

Stereodifferentiation of Chiral Compounds Using Reversed-Phase Liquid Chromatography Coupled with Capillary Gas Chromatography

Determination of Gabapentin in Serum Using Solid-Phase Extraction and Gas-Liquid Chromatography

Determination of Phenolic Compounds in Wastewater by Liquid-Phase Microextraction Coupled with Gas Chromatography

Temperature Dependence Study of Several Polarity Scales Used in Gas—Liquid Chromatography Stationary Phase Characterization

Rapid Monitoring and Determination of Class 1 Residual Solvents in Pharmaceuticals Using Dispersive Liquid–Liquid Microextraction and Gas Chromatography–Mass Spectrometry

Determination of Bisphenol A in Water by Micro Liquid—Liquid Extraction Followed by Silylation and Gas Chromatography—Mass Spectrometry Analysis

Homogeneous Liquid–Liquid Microextraction for Determination of Organophosphorus Pesticides in Environmental Water Samples Prior to Gas Chromatography-Flame Photometric Detection

Determination of Buprenorphine in Human Plasma by Gas Chromatography-Positive Ion Chemical Ionization Mass Spectrometry and Liquid Chromatography-Tandem Mass Spectrometry

Analysis of Polycyclic Aromatic Hydrocarbon Derivatives by On-Line Coupled Packed-Capillary High-Performance Liquid Chromatography-High-Temperature Gas Chromatography

Enantiomer Analysis of Chiral Lactones in Foods by On-Line Coupled Reversed-Phase Liquid Chromatography—Gas Chromatography

 

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Quick Reference

A technique for separating or analysing mixtures of gases by chromatography. The apparatus consists of a very long tube containing the stationary phase, a nonvolatile liquid, such as a hydrocarbon oil coated on a solid support. The sample is often a volatile liquid mixture (e.g. of fatty acids), which is vaporized and swept through the column by a carrier gas (e.g. hydrogen). The components of the mixture pass through the column at different rates and are detected as they leave, either by measuring the thermal conductivity of the gas or by a flame detector.

Gas chromatography is usually used for analysis; components can be identified by the time they take to pass through the column. It is also used for separating mixtures into their components, which are then directly injected into a mass spectrometer in the technique of gas chromatography–mass spectrometry.

Subjects: Biological Sciences.


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