Is pyrolysis gas chromatography useful in paint analysis?
The results obtained, enable one to draw the conclusion that Py-GC/MS appears as valuable, very informative analytical technique of car paint samples examination. Providing identification of paint pyrolysis products, it enables discrimination of samples on the basis of their composition.
What is an advantage of GC-MS?
One of the major advantages of GC-MS compared to LC-MS is the high reproducibility of generated mass spectra using EI. The electron impact ionization process, used in GC-MS, is a hard ionization that results in the production of very reproducible mass spectra from one instrument to another.
What is pyrolysis gas chromatography used for?
Pyrolysis gas chromatography, combined predominantly with mass spectrometry, is a powerful analytical method for the categorization of polymers. Moreover, it is useful for the characterization of monomers, comonomers, additives, and impurities.
When would you use pyrolysis gas chromatography?
This technique allows the direct analysis of very small sample amounts (5–200 μg) without the need of time-consuming sample preparation. Pyrolysis-GC/MS can be applied to research and development of new materials, quality control, as well as characterization and competitor product evaluation.
How does pyrolysis gas chromatography work?
Pyrolysis–gas chromatography–mass spectrometry (Py-GC-MS) is a method of chemical analysis where a sample is introduced to an anaerobically heated environment and broken down into smaller stable fragments or components through controlled thermal degradation (pyrolysis).
Which evidence is examined by pyrolysis gas chromatography?
Pyrolysis gas chromatography is also used for environmental samples, including fossils. Pyrolysis GC is used in forensic laboratories to analyze evidence found of crime scenes such as paints, adhesives, plastics, synthetic fibres and soil extracts.
What are the limitations of GC-MS?
However, GC–MS suffers from two major limitations: First, only a relatively small range of volatile, thermally stable compounds are amenable for analysis, and second, EI mass spectra suffer from a frequent absence or weakness of the molecular ions.
Why is chromatography particularly well suited to the needs of a drug analyst?
Why is chromatography particularly well suited to the needs of a drug analysis? They can separate unknown mixtures into their separate components so they can be better identified. It can resolve a highly complex mixture into its components quickly, it is sensitive, and it can yield quantitative results.
What is used as the mobile phase in gas liquid chromatography?
In gas-liquid chromatography, the mobile phase is a gas such as helium and the stationary phase is a high boiling point liquid absorbed onto a solid.