JASCO | Optical Rotary Dispersion
What is ORD(Optical Rotatory Dispersion) ?
TS Science
Product
[CD] Circular Dichroism
[CD]Optical Rotary Dispersion
→Optical Rotatory Dispersion (ORD) provides information on chiral molecules even without chromophores, such as saccharides. It can be used to measure the chirality of non-absorbing samples and the determination of absolute configuration.
JASCO offers two methods of ORD detection: optical null and intensity measurement systems. The intensity measurement method, using a fixed analyzer, is simpler and more economical, while the optical-null approach, with its rotating analyzer, is intrinsically more accurate because the measurement is absolute. Since ORD is very sensitive to strain in the sample cell window, cylindrical cells are strongly recommended for use ORD measurement.
1. ORDM-520 | ORD attachment
This accessory allows detection of ORD over a wide angular range (90º) with very high accuracy using a rotating analyzer. No calibration is required, and switching back and forth from CD to ORD is handled automatically by the PC software.
The system uses a separate optical path with servo-driven analyer and a dedicated PM tube.
2. ORDE-521 | ORD attachment
The electrical ORD accessory has an angular range up 2 º. Since the measurement principle is based on an electrical measurement method, the apparatus is simper and is also able to respond faster to changes in ORD signals.
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