A quest for the optimal additive in chiral preparative chromatography
2009 (English)In: Journal of Chromatography A, ISSN 0021-9673, E-ISSN 1873-3778, Vol. 1216, no 23, 4719-4727 p.Article in journal (Refereed) Published
Traditionally, the choice of acid/base additives used in chiral preparative chromatography has not been considered very important. However, it was recently demonstrate that strongly adsorbing additives can result in the Most unexpected enantiomer band shapes in modern chiral preparative chromatographic systems. In the present study we demonstrate that, depending on the choice of additive, it is actually possible to obtain the following four binary band-shape compositions when a racemic mixture is injected: (i) anti-Langmuir/anti-Langmuir, (ii) anti-Langmuir/Langmuir, (iii) Langmuir/Langmuir and (iv) Langmuir/anti-Langmuir. Further, we made an advanced numerical investigation, in order to ascertain which one of the four band-shape compositions, is the most favourable one in preparative batch chromatography of a racemic mixture. We found that if the target for purification is either the first eluting enantiomer or both ones, the traditional Langmuir/Langmuir band-shape composition should be chosen. But, if only the second eluting enantiomer is to be purified the optimal situation is the anti-Langmuir/Langmuir band-shape composition. Thus, it was concluded that the best choice of additive depends on which enantiomer is of interest and it is useful to perform a thorough additive screening to find the optimal additive, giving the most advantageous peak shape composition and accordingly the best process performance for a particular separation problem. (C) 2009 Elsevier B.V. All rights reserved.
Place, publisher, year, edition, pages
2009. Vol. 1216, no 23, 4719-4727 p.
Additive, Unusual band shapes, Anti-Langmuir, Inverse solver, Adsorption data, Numerical optimization, Productivity, Yield
IdentifiersURN: urn:nbn:se:uu:diva-129020DOI: 10.1016/j.chroma.2009.04.010ISI: 000266449800004OAI: oai:DiVA.org:uu-129020DiVA: diva2:332462