What is gas chromatography in air pollution?
Answers
several phases moving relative to another one (or other ones). The advantages of gas chromatography are that the separation capacity of the sorbent can easily be changed by choosing the optimum stationary liquid phase (SLP), the symmetry of solute bands and a better reproducibility of sorbent properties. A particularly interesting variant is chromatographic separation with the gaseous mobile phase in the supercritical state. Supercritical fluid chromatography (SFC) has made it possible to separate porphyrins that could not be analyzed at high temperatures owing to their thermal instability. The analytical potential of gas chromatography can be substantially expanded by employing several detectors. The use of the mass spectrometer for detection has led to the development of highly efficient combined gas chromatography-mass spectrometry (GC-MS). A gas chromatograph with a packed or capillary column is connected to a mass spectrometer via a molecular separator serving to concentrate the separated bands and partially remove the carrier gas.
Answer:
Explanation:
several phases moving relative to another one (or other ones). The advantages of gas chromatography are that the separation capacity of the sorbent can easily be changed by choosing the optimum stationary liquid phase (SLP), the symmetry of solute bands and a better reproducibility of sorbent properties.
A particularly interesting variant is chromatographic separation with the gaseous mobile phase in the supercritical state. Supercritical fluid chromatography (SFC) has made it possible to separate porphyrins that could not be analyzed at high temperatures owing to their thermal instability.
The analytical potential of gas chromatography can be substantially expanded by employing several detectors. The use of the mass spectrometer for detection has led to the development of highly efficient combined gas chromatography-mass spectrometry (GC-MS). A gas chromatograph with a packed or capillary column is connected to a mass spectrometer via a molecular separator serving to concentrate the separated bands and partially remove the carrier gas.