Worksheet: Chromatograms

In this worksheet, we will practice identifying common features of chromatograms, including solvent fronts and tailing and fronting effects.

Q1:

Which of the following does the void peak in a chromatogram correspond to?

  • AThe peak that arises from the mobile phase only
  • BComponents that had no interaction with the mobile phase
  • CThe peak that arises from poor selection of a stationary phase
  • DAll peaks after the first peak in the chromatogram
  • EComponents that had no interaction with the stationary phase

Q2:

“Tailing” of a chromatographic peak is a result of which of the following?

  • AInteractions between the stationary and mobile phases
  • BSmall theoretical plate heights
  • CInteractions of the solute with the stationary phase
  • DOverloading the column with sample
  • EToo many theoretical plates

Q3:

“Fronting” of a chromatographic peak is a result of which of the following?

  • AInteractions of the solute with the stationary phase
  • BSmall theoretical plate heights
  • COverloading the column with sample
  • DInteractions between the stationary and mobile phases

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