Page 53 - Pharm.Org.Chem-I 02-06-05-101
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Definition of specific rotation [α]D
It is the observed rotation (α) when:
❑ The sample path length (l) is 1 dm
❑ The sample concentration (C) is
1g/mL
The light wavelength is 599.6 nm❑
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If standard conditions used:
➢The D line of a sodium lamp wave
length is 599.6 nm
➢The temperature is 25o C
➢The sample Concentration is 1 g/mL
➢The sample tube length is 1 dm
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