CHEM 230 – Chemical Separations

Fall, 2012

Student Presentations


I.  Overview of Presentations

         The goal of these presentations is for students to develop an ability to learn to research, understand, and present topics.  These skills are often needed for your career when the techniques you learn become obsolete and are replaced with new techniques. A list of topics is given in section II.  If you are interested in other or related topics, ask the instructor first.  Students will be working in pairs.  Each group is expected to have a set of readings for the class (see section III below) and two homework problem (these problems will be for classmates benefit and will not be graded – see section IV).  The presentation must be in Powerpoint.  I expect that the presentations will be about 30 minutes, but this will be announced later once I know the number of groups.  Time will be reserved for questions and general discussion (the general discussion may come later).


II.  List of Special Topics

1.  Advanced extraction techniques: stir bar microextraction

2.  Advanced extraction techniques: QuEChERS

3.  Advanced extraction techniques: supercritical fluid extraction

4.  Advanced extraction techniques: molecular imprinted templates for solid phase extraction

5.  Portable/Microscale GC

6.  Supercritical fluid chromatography (may need to narrow to use for isolation, for capillary column based SFC, etc.)

7.  Superficially porous particles in HPLC

8.  Zirconia based stationary phases for HPLC

9.  Zwitterionic stationary phases in HPLC

10.  Monolithic HPLC/CEC columns

11.  Chiral separations (HPLC or GC)

12.  2D LC methods

13.  Atmospheric pressure photoionization for LC-MS

14.  Modern direct MS interfaces (such as DESI)

15.  Portable/Microscale mass spectrometers

16.  Ion mobility spectrometers

17.  Non-aqueous capillary electrophoresis

18.  Micellar Electrokinetic Chromatography

19.  Electrochemical detection (for HPLC or CE)

20.  Microchip CE (probably too broad a class)

21.  Fluid flow fractionation


These topics may be modified somewhat (e.g. narrower or broader focus) with instructor permission.  Most topics will be limited to 1 student group.  If students can come up with what I think is a good topic, this could be added to the list above.


III.  Reading Materials

You will need to make reading materials available to the class 1 week before your presentation.  The reading materials could include a review article, book chapters, primary research articles, etc.  Try to target 20 to 60 pages of reading materials.  The most appropriate materials are those not designed for experts in the field (many reviews are meant to update experts on new results over the last three years – these reviews generally are not helpful for students learning basics of a new technique).  For more narrowly defined areas, seminal journal articles are often best.  The materials can be made available to the class by either photocopying an article/book chapter for the instructor to post or to give information regarding a website (e.g. journal website) where the article can be downloaded.



For example, the following references are useful references for the example specialized topic, Aerosol-Based Detectors for HPLC:

Koropchak, J. A., S. Sadain, X. Yang, L.-E. Magnusson, M. Heybroek, M. Anisimov, and S. L. Kaufman, Nanoparticle detection technology for chemical analysis, Anal. Chem. 1999, 71, 386A-394A. (

Koropchak, J. A., L.-E. Magnusson, M. Heybroek, S. Sadain, X. Yang, and M. Anisimov, Fundamental Aspects of Aerosol-Based Light Scattering Detectors for Separations, Adv. Chromatogr., 2000, 40, 275-314.

Dixon, R. W. and D. S. Peterson, Development and testing of a detection method for liquid chromatography based on aerosol charging, Anal. Chem., 2002, 74, 2930-2937.

Gamache, P. H., R. S. McCarthy, S. M. Freeto, D. J. Asa, M. J. Woodcock, K. Laws, and R. O. Cole, HPLC analysis of nonvolatile analytes using charged aerosol detection, LCGC North America, 2005, 23, 150, 152, 154, 156, 158, 160-161.

Vehovec, T. and A. Obreza, Review of operating principle and applications of the charged aerosol detector J. Chromatogr., 2010, 1217A, 1549-1556.

IV.  Homework Problems

You will need to prepare homework problems to be distributed on the day of the presentation. More information will be given on this later.


V.  The Presentation

The presentation should be prepared using Powerpoint slides.  The file will need to be given to the instructor so that it can also be posted on the class website.  The presentation should include the following parts:

1.  A Title Slide

2.  An introduction that places the methodology/technology you are discussing in context of other areas of separation science.  This also can give a background into how this technology developed.

3.  A description of the theoretical basis for the methodology/technology

4.  A description of advantages and disadvantages of the technology vs. other technologies

5.  A list of some applications of the technology (this should focus on recent/innovative applications).

6.  Concluding statements

It is recommended that each student in a group present part of the material, but it is probably better if you don’t trade off speakers too often.  More particulars (such as the targeted time) will be given later


VI.  Grade sheet (see the last page for for the grade sheet used two years ago for the presentations by the instructor)


VII.  Questions and Discussion

            A.  Directly following the presentations

- since you are responsible for learning the material, you should ask questions if you have difficulties understanding concepts

            B.  Later discussions

- I will try to pose questions related to presentations to stimulate additional learning and discussion.  We also can discuss solutions to homework problems.



CHEM 230 – Student Presentations – GRADING KEY

50 Points Total


Names  __________________________________

Title ________________________________


I.  Preparation for Presentation (10 points)

         A.  Made articles available in time.  (2 points)

         B.  Quality and relevance of articles found.  (3 points)

         C.  Homework Problems (on time, quality of problems, reasonable answers) (5 points)


III.  Presentation Content (20 points)

         Title Slide                                                            _______ (1 points)

         Introduction                                                         _______  (5 points)

                  Context  ______  (why needed); Background  ______  (how developed)

         Theory of Technology (how does it/they work) __________ (6 points)

         List of Advantages and Disadvantages                  ___________ (3 points)

         Applications:                                                        ___________ (4 points)

                  Detailed, describing specific advantages ____ or lists _____

         Conclusions                                                         ____________(1 pts)

Specific Comments:




IV.  Presentation Quality (20 points)

Eye Contact/Interaction with Audience              _____________ (4 pts)

Speaking Tone/Speed                                       _____________ (4 pts)

Slide Quality                                                     _____________ (5 pts)

Level of Presentation (understandable)              _____________ (5 pts)

Handling of Questions                                       _____________ (2 pts)

Specific Comments: