Hydroxylation of β-Carotene on Micro-Cel C

Authors

Delia B. Rodriguez, University of Rhode Island
L. Simpson, University of Rhode Island
Tung Ching Lee, University of Rhode Island
Clinton O. Chichester, University of Rhode Island
Yohito Tanaka, Kagoshima University
Teruhisa Katayama, Kagoshima University

Document Type

Article

Date of Original Version

7-1-1976

Abstract

β-Carotene underwent substantial hydroxylation to isocryptoxanthin (4-hydroxy-β-carotene) when brought in contact with Micro-Cel C, an adsorbent long presuined to be inert. The reaction was rapid, the maximum accumulation rate of isocryptoxanthin occurring within the first 15 min. The extent of hydroxylation depended directly on the amount of Micro-Cel C; the percent yield of 1 mg of β-carotene ranged from 23% with 10 g of Micro-Cel C to 65% with 30 g of Micro-Cel C. Isozeaxanthin (4,4′-dihydroxy-β-carotene) was also formed but at markedly lower amounts. Very small quantities of mutatochrome, echinenone, 4-hydroxy-5′,8′-epoxy-β-carotene, and dehydro-β-carotene were also detected. The hydroxylating property of Micro-Cel C was not observed in other adsorbents such as silica gel, kieselguhr, Celite, alumina, HyfloSupercel, and MgO. © 1976, American Chemical Society. All rights reserved.

Publication Title, e.g., Journal

Journal of Agricultural and Food Chemistry

Volume

24

Issue

4

Citation/Publisher Attribution

Rodriguez, Delia B., L. Simpson, Tung Ching Lee, Clinton O. Chichester, Yohito Tanaka, and Teruhisa Katayama. "Hydroxylation of β-Carotene on Micro-Cel C." Journal of Agricultural and Food Chemistry 24, 4 (1976): 819-822. doi: 10.1021/jf60206a052.