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Chapter 23: Q40P (page 631)

Explain how slinization reduces tailing of chromatographic peaks.

Short Answer

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Silanization creates hydroxyl groups that can form strong hydrogen bonds.

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We will explain how slinization can reduce chromatographic peak tailing in this task.

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- the process of applying alkoxysilane molecules to a surface.

- By blocking the silanol groups with nonpolar trimethylsilyl groups, this technique reduces tailing.

- It's called end-capping because silanization can cap hydroxyl groups that can create strong hydrogen bonds, which reduces chromatographic peak tailing.

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Most popular questions from this chapter

(a) A chromatography column with a length of 10.3 cmand inner diameter of 4.61mmis packed with a stationary phase that occupies 61.0% of the volume. If the volume flow rate is 1.13mL, find the linear velocity in cm/min.(b) How long does it take for solvent (which is the same as unretained solute) to pass through the column? (c) Find the retention time for a solute with a retention factor of 10.

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(a) What volume of phase 2 is needed to extract 99% of the solute in one extraction?

(b) What is the total volume of solvent 2 needed to remove 99% of the solute in three equal extractions?

In chromatography, resolution is governed by (a) the number of plates, (b) relative retention, and (c) retention factor. Construct a set of graphs to show the dependence of resolution on each of these three parameters. Comment on the nature of the dependence of resolution on each of these three parameters.
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