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Updated: Jun 20, 2026

On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids
Published on: March 2, 2012
Preparative-scale isoelectric focusing separation of enantiomers using a multicompartment electrolyzer with
P Glukhovskiy1, T A Landers, G Vigh
1Chemistry Department, Texas A&M University, College Station 77842-3012, USA.
Abstract:
The IsoPrime multicompartment electrolyzer, equipped with a series of isoelectric membranes with closely spaced pI values, was used for the first time for the preparative-scale separation of the enantiomers of dansyl phenylalanine with hydroxypropyl beta-cyclodextrin as resolving agent. The final separation conditions could be established easily in three successive experiments by rationally narrowing the pH steps between the neighboring isoelectric membranes. The final separation yielded products with an enantiomeric excess greater than 99.9%, at production rates of about 0.1 mg/h. The greatest experimental difficulty was caused by the relatively high salt content of the hydroxypropyl beta-cyclodextrin used, which resulted in high conductivity and limited the maximum field strength one could use.
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