Studies on Citrus Carotenoids

Part X. Carotenoid patterns of some citrus flesh for blended juice

Abstract

Carotenoid patterns of several varieties of Natsudaidai, Unshiu and imported valencia orage juices were determined and disscussed on the possibility of the estimation of blended ratio when these were blended each other.
Total carotenoids and catenoid patterns of various Natsudaidai were different remakably depending on each variety and growing area. These results suggested that the blended ratio of Natsudaidai could not be estimated when Natsudaidai is blended with Unshiu juice.
On the other hand, Unshiu and Valencia orange showed almost uniform carotenoid pattern in each citrus group independent their varieties and growing areas. Total carotenoids of Unshiu and Valencia orange were almost equal in the range from 2 to 3 mg%. In addition to these results, low similarity of the carotenoid pattern between Unshiu and Valencia orange suggested that the possibility on the estimation of blended ratio when those two citrus juices are blended.