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What Are The Main Differences Between High Performance Liquid Chromatography And Gas Chromatography?

Answer»
  • In HPLC the mobile phase is a liquid whereas in Gas Chromatography the mobile phase or carrier is a gas.
  • HPLC is useful for analysis of SAMPLES which are liable to decompose at higher temperatures. GC INVOLVES high temperatures so compounds are stable at such temperatures.
  • Gas Chromatography is applied for analysis of volatile compounds whereas non volatile compounds can be easily analyzed on HPLC
  • Gas Chromatography cannot be used for analysis of high molecular weight molecules whereas HPLC has applications for separation and identification of very high molecular weight compounds
  • HPLC REQUIRES higher OPERATING pressures than GC because liquids require higher pressures than gases for transport through the SYSTEM
  • HPLC columns are short and wide in comparison to GC columns



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