Abstract
Use of instrumentation developed to enable simultaneous monitoring of optical rotation (OR) and transmittance allows OR measurements to be made in the presence of high levels of absorbance, scattering or other effects that change the intensity of the plane-polarised light at the photodiode detector. This extends the application of OR detection to areas where it was previously difficult. Examples of the application of high-performance liquid chromatography (HPLC) with the improved OR detector include (i) the analytical scale separation of fructose and sucrose and (ii) the semi-preparative separation of enantiomers of warfarin and Trogers base. A signal-to-noise improvement of up to 150% is found when comparing signals with and without correction for transmittance changes. The improved OR detector has been used in series with a UV detector and the system shown to be suitable for on-line measurement of peak purity in separations using a chiral column under overload conditions. (C) 2001 Elsevier Science BV All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 41-48 |
| Number of pages | 8 |
| Journal | Journal of Chromatography A |
| Volume | 939 |
| Issue number | 1-2 |
| Publication status | Published - 21 Dec 2001 |
Keywords
- optical rotation
- scattering
- absorbance
- enantiomer separation
- detection, LC
- chiroptical detector
- sucrose
- fructose
- warfarin
- Trogers base
- CHIRAL STATIONARY PHASES
- CIRCULAR-DICHROISM
- ENANTIOSELECTIVE CATALYSTS
- POLARIMETRIC DETECTION
- ENANTIOMERS
- PURITY
- ACID