Gas Chromatography Questions

• Which of the following gases is unsuitable for use as a GC carrier gas?
• Which of the following are not used as stationary phases in a GC column?
• Which of the following detectors give concentration-dependent signals?
• Headspace analysis is carried out in order to
• Theoretical plates are used to
• What is the typical internal diameter of fused silica capillary columns?
• A retention gap is placed between the injector and the front of the column to
• Split injection is carried out by
• What useful information can be found from a Van Deemter plot?
• The GC trace obtained after an experiment is called a
• Which of the statements is correct?
• What does the retention factor, k', describe?
• Sample retention in the column is measured by
• Sample injection is considered successful if
• What are the benefits of decreasing the column internal diameter?
• Derivatisation of a sample is carried out to
• In column switching chromatography
• Resolution is proportional to the
• The column is heated to
• Which of the following detectors give mass flow-dependent signals?