SIELC_Tech,
Perhaps it wasn't your intent but your post seems to suggest that you can use "TFA, ammonium acetate, ammonium formate, etc." to adjust retention Glucosamine on the KC-811 column. In fact, none of you are suggestions would be of any help since the capacity of the column in question is far higher than the column shown via the link in your post. The eluent suggestions would be of no help on this column as this is the wrong column for this application. Furthermore, the ammonium salts you suggest would damage the column since the column is a gel based cation-exchange column and such materials undergo significant change in particle size when changing salt form.
Of course, my guess is that you really meant to suggest your column as an alternative to the KC-811 column. In this case, one might argue that your post was rather inappropriate considering the fact that the original post did not request suggestions on alternative columns for the separation but rather asked whether or not the KC-811 column could be used for this separation. Dionex makes more than a dozen columns which could be used for this application but you'll notice that I did not recommend any of them, not because they wouldn't work for the application but because the original post asked about using a specific column for a specific analyte. Somehow, it seems inappropriate to use every post as a pretext for promoting your product. True, there are many cases where this is appropriate and you'll note that on many occasions I have promoted Dionex products in such cases. However, the purpose of this forum is not meant to be a vehicle for selling our products but rather it is meant as a medium through which practitioners of the art may gain information about problems encountered or to seek answers to questions associated with the practice of chromatography.
