Talk:Ion chromatography

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Untitled
I added some diagrams that I created with inkscape for a presentation. I admit that they are oversimplified but I feel they get basics across. Feel free to put them in line. I'm pretty new to this but it is my intent that these images are free for personal use.

I added in a screenshot of a chromatogram (from a separation simulator program) a while ago. Today I put in a brief history of IEC and IC and also a link to the standard text on IC by Joachim Weiss. I also removed the "High Performance" descriptor on the image of the IC instrument as usually this is instead reserved for describing HPLC.Daviddamoore 17:49, 8 March 2007 (UTC)

I added back in the reference to the "Ion Chromatography Handbook" as it is recognized as the definitive literature on the subject. I took out the Amazon link though, and added in the ISBN reference instead. I also added in a picture of another IC workstation that shows some of the magic that goes on behind the door covers! It also shows up a bit better on the thumbnail than the first picture.Daviddamoore 23:07, 16 July 2007 (UTC)

I changed the picture in the summary box to the other picture of an IC system as this shows the detailed components within. I also changed the acronym to "IC", and corrected the list of IC manufacturers. Note that Phenomenex only makes columns for IC, not instrumentation. Daviddamoore 17:06, 22 August 2007 (UTC)

The descriptions and examples on this page seem only to describe analytical ion chromatography, and not preparative / process-scale ion chromatography. Would anyone like to remedy this? Najork (talk) 23:58, 4 April 2008 (UTC)

I added a section about "Weak" and "Strong" exchange resins. Should I expand on this and list some examples of each? --Ns196 (talk) 16:08, 30 March 2016 (UTC)

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ion exchange chromatography vs. ion chromatography
In my Analytical Chemistry class, the professor said that these two are actually not synonyms; rather, ion chromatography is a specific high-performance version of ion exchange It seems to me for now that in the case of anions as analytes and KOH as eluent, it is a combination of an anion-exchange column (separator) and a cation-exchange column (suppressor). I'm thinking maybe the distinction should be brought up also in the article. The textbook we use is the "Exploring Chemical Analysis" by Daniel C. Harris, and the information is mentioned in Chapter 23, Section 2 (P.515). Keith Galveston (talk) 03:43, 8 June 2009 (UTC)

That is exactly what I was taught, and what I'm teaching the students in my practicals. IEC uses stronger resins, and a second mobile phase is required to wash off the retained ions; IC uses weaker resins, and a continuous flow of mobile phase means that the ions are washed off continuously, while allowing them to separate. Even though the two methods are based on the principle of ion exchange, there is a large difference between them. Kumorifox (talk) 12:49, 27 October 2009 (UTC)

Proposed change in introduction
Information to be added or removed: In the sentence "For example, when cation exchange chromatography is used, cations will elute out last." cations should be changed to anions if I am not wrong.

Explanation of issue: In cation exchange chromatography the stationary phase is positively charged and cations (positively charged molecules) will be repelled by the stationary phase and elute first. Anions, on the other hand, will be attracted to the cation stationary phase and will elute out last.

JRMKW (talk) 13:34, 17 September 2019 (UTC)