Tsukida K, Kodama A, Ito M
J Chromatogr. 1977 Apr 11;134(2):331-6. doi: 10.1016/s0021-9673(00)88530-1.
A high-performance liquid chromatographic method for the simultaneous determination of geometric isomers of retinal in a mixture has been developed. The method can be applied to problems such as determination of optimal conditions for the preparation of a particular isomer, or the investigation of novel photoproducts from retinal. Aprotic solvent effects on cis-trans isomerization are discussed.