.columns with one million theoretical plates operating by slip flow. The figure shows the gradient separation of two forms of fluorescently labeled bovine serum albumin separated on a)50 x 2.1 mm UHPLC column of 1.7 µm C4 silica particles and b)10 mm x 75µm colloidal crystal column of 470 nm C4 silica nanoparticles. What are the main differences in the chromatogram? What is the reason for the difference? Why does the colloidal crystal column have such a high number of theoretical plates (N)? How is the problem of high pressures with very small particles overcome?

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter6: Random Errors In Chemical Analysis
Section: Chapter Questions
Problem 6.13QAP
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4.columns with one million theoretical plates operating by slip flow.

The figure shows the gradient separation of two forms of fluorescently labeled bovine serum albumin separated on

a)50 x 2.1 mm UHPLC column of 1.7 µm C4 silica particles and

b)10 mm x 75µm colloidal crystal column of 470 nm C4 silica nanoparticles.

  1. What are the main differences in the chromatogram? What is the reason for the difference?
  2. Why does the colloidal crystal column have such a high number of theoretical plates (N)?
  3. How is the problem of high pressures with very small particles overcome?
10
11
12
13
2.2
2.3
2.4
2.5
2.6
2.7
(d
Time (min)
Time (min)
(a)
(b)
Detector response
Transcribed Image Text:10 11 12 13 2.2 2.3 2.4 2.5 2.6 2.7 (d Time (min) Time (min) (a) (b) Detector response
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