Answer :
Final answer:
Gas Chromatography uses detectors such as Flame Ionization Detector, Thermal Conductivity Detector, Electron Capture Detector, Photo Ionization Detector, and Mass Spectrometer. Each detector operates differently and has its own advantages and disadvantages.
Explanation:
Gas Chromatography (GC) involves the use of various detectors to analyze the components of a chemical mixture. Here are five commonly used detectors:
- Flame Ionization Detector (FID): The FID operates by burning the sample and measuring the ions produced. It’s advantage is its wide range of detectability and its main disadvantage is that it destroys the sample.
- Thermal Conductivity Detector (TCD): The TCD operates by measuring changes in thermal conductivity of the gas carrier. It is non-destructive and has a wide range of detectability, but it is less sensitive than other detectors.
- Electron Capture Detector (ECD): The ECD operates by detecting the drop-in current caused when sample molecules capture electrons. It’s highly sensitive to halogens but isn’t ideal for compounds that don’t contain electronegative elements.
- Photo Ionization Detector (PID): The PID operates by ionizing the sample with UV light and measuring the resulting current. Its advantage is that it provides instant measurements, but it isn't as selective as other detectors.
- Mass Spectrometer (MS): The MS operates by ionizing the sample and sorting the ions based on their mass to charge ratio. It provides highly detailed information, but it is more complex and expensive than the other detectors.
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