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Tuning a Parallel Segmented Flow Column and Enabling Multiplexed Detection
Published on: December 15, 2015
Selectivity tuning of serially coupled (S,S) Whelk-O 1 and (R,R) Whelk-O 1 columns in HPLC
J Dungelová1, J Lehotay, J Krupcik
1Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak University of Technology, Bratislava, Slovakia.
Abstract:
The selectivity tuning of two columns coupled in series is investigated in chiral high-performance liquid chromatography. Two columns with reversal enantioselectivities [(R,R) Whelk-O 1 and (S,S) Whelk-O 1] are coupled in series via a T connector. Selectivity of such a column series is tuned by varying the mobile phase flows in the individual columns. The flow ratio necessary for the required selectivity is calculated on the basis of retention factors measured on the individual columns. The performance of this method for adjusting the required selectivity is studied by the separation of enantiomers of alkoxy substituted esters of phenylcarbamic acid. It is demonstrated that the change of the mobile phase flows in the individual columns enables change in the elution order of enantiomers.
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