chapt 23 assign

1

Chapter 23 and class notes What is the generalized chemical structure of the most common type of GC non-polar/low- polarity stationary phase? Why might zeolite particles as a stationary phase be especially useful for separation of small gaseous analytes? Why is He generally a better carrier gas than N 2 for GC? Illustrate with an approximate van Deemter plot. Describe the basic principles of operation of a TC (thermal conductivity) detector with a Wheatstone bridge. (Assume you are given an unlabeled diagram.) What carrier gas is best for a GC equipped with a TC detector and why? Describe the basic principles of operation of a FI (flame ionization) detector. (Assume you are given an unlabeled diagram.) Describe the basic principles of operation of an EC (electron capture) detector. (Assume you are given an unlabeled diagram.)

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CH 23 ass.

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Page 1: Chapt 23 Assign

Chapter 23 and class notes

What is the generalized chemical structure of the most common type of GC non-polar/low-

polarity stationary phase?

Why might zeolite particles as a stationary phase be especially useful for separation of small

gaseous analytes?

Why is He generally a better carrier gas than N2 for GC? Illustrate with an approximate van

Deemter plot.

Describe the basic principles of operation of a TC (thermal conductivity) detector with a

Wheatstone bridge. (Assume you are given an unlabeled diagram.)

What carrier gas is best for a GC equipped with a TC detector and why?

Describe the basic principles of operation of a FI (flame ionization) detector. (Assume you are

given an unlabeled diagram.)

Describe the basic principles of operation of an EC (electron capture) detector. (Assume you are

given an unlabeled diagram.)

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