In column switching chromatography

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Question:
 
In column switching chromatography

1.compounds trapped on one column are eluted to another column

2.one column is removed and replaced by another

3. the flow to the column is switched on and off repeatedly

4.any of the above

Posted Date:-2021-03-07 11:03:33

More MCQS Questions and answers

  1. Column bleeding occurs when
  2. In column switching chromatography
  3. Which of the following gases is unsuitable for use as a GC carrier gas?
  4. A retention gap is placed between the injector and the front of the column to
  5. Derivatisation of a sample is carried out to
  6. Doubling the column's length increases resolution by a factor of
  7. Headspace analysis is carried out in order to
  8. Helium is generally preferred as carrier gas over nitrogen and hydrogen because
  9. What is the typical internal diameter of fused silica capillary columns?
  10. Resolution is proportional to the
  11. Sample injection is considered successful if
  12. Sample injection is considered successful if
  13. Sample retention in the column is measured by
  14. Split injection is carried out by
  15. The column is heated to
  16. The GC trace obtained after an experiment is called a
  17. Theoretical plates are used to
  18. What are the benefits of decreasing the column internal diameter?
  19. What does the retention factor, k', describe?
  20. What does the selectivity factor describe?
  21. What useful information can be found from a Van Deemter plot?
  22. Which of the following are not used as stationary phases in a GC column?
  23. Which of the following detectors give concentration-dependent signals?
  24. Which of the following detectors give mass flow-dependent signals?
  25. Which of the following is not used for detection in GC?
  26. Which of the statements is correct?
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