What does pyrolysis gas chromatography do?
Pyrolysis Gas Chromatography/Mass Spectrometry (Pyrolysis-GC-MS) is an analytical tool used to characterize a wide variety of polymers and composite materials that cannot be analyzed using traditional GC-MS. The pyrolyzates are then chromatographically separated in the same manner as traditional GC-MS.
When would you use pyrolysis gas chromatography?
Pyrolysis-GC/MS can be used to obtain informations about the chemical composition of potential microplastic particles in environmental samples by analyzing their thermal degradation products (Fries et al., 2013).
What is gas chromatography short definition?
Gas chromatography (GC): A type of automated chromatography (a technique used to separate mixtures of substances) in which the mixture to be analyzed is vaporized and carried by an inert gas through a special column and thence to a detection device.
What are the two types of gas chromatography?
Two types of gas chromatography are encountered: gas-solid chromatography (GSC) and gas-liquid chromatography (GLC). Gas-solid chromatography is based upon a solid stationary phase on which retention of analytes is the consequence of physical adsorption.
What is the difference between gas chromatography and pyrolysis chromatography?
Introduction. Pyrolysis-gas chromatography (Py-GC) is at its base a way of extending the utility of gas chromatography to the analysis of nonvolatile materials. Gas chromatography – with any detector – is a way to separate mixtures of compounds in the vapor phase.
What is pyrolysis in chemistry?
Pyrolysis is the process of chemically decomposing or transforming a material into one or more recoverable substances by heating it to very high temperatures in an oxygen-free environment.
What is gas chromatography?
Gas chromatography (GC) is an analytical technique used to separate the chemical components of a sample mixture and then detect them to determine their presence or absence and/or how much is present. These chemical components are usually organic molecules or gases.
What is gas chromatography PDF?
Abstract. Gas chromatography is a term used to describe the group of analytical separation techniques used to analyze volatile substances in the gas phase. The stationary phase is either a solid adsorbant, termed gas-solid chromatography (GSC), or a liquid on an inert support, termed gas-liquid chromatography (GLC).
What is the principle of GLC?
Principle. GLC is based upon partitioning of compounds between stationary liquid and mobile gas phase. Due to its high sensitivity, reproducibility, and speed of resolution, it is widely used for several qualitative and quantitative analyses.
Why is it called gas chromatography?
How does gas chromatography work? As the name implies, GC uses a carrier gas in the separation, this plays the part of the mobile phase (Figure 1 (1)). The carrier gas transports the sample molecules through the GC system, ideally without reacting with the sample or damaging the instrument components.
How are pyrolysis gas chromatography and mass spectrometry used?
Pyrolysis Gas Chromatography/Mass Spectrometry (Pyrolysis-GC-MS) is an analytical tool used to characterize a wide variety of polymers and composite materials that cannot be analyzed using traditional GC-MS. The fundamental concept of Pyrolysis-GC-MS is not complicated but highly sensitive.
How does pyrolysis GC-MS eliminate sample preparation?
Pyrolysis-GC-MS virtually eliminates the need for the various sample preparation techniques required by traditional GC-MS (extraction, dilutions, concentrating the sample, various chemical reactions, heating/cooling, etc. are unnecessary).
What kind of heating is used in pyrolysis?
Three different heating techniques are used in actual pyrolyzers: Isothermal furnace, inductive heating ( Curie Point filament), and resistive heating using platinum filaments. Large molecules cleave at their weakest bonds, producing smaller, more volatile fragments.
What’s the temperature of a double shot pyrolysis?
This is done in order to characterize the original sample. A Double Shot Pyrolysis: This is normally run at both low (80-350°C) and high temperatures (500-800°C). The lower temperature analysis is known as a thermal desorption step.