| PJS Vol 129 No. 1 | Short Communication |
| Pg 15-17, June 2000 | |
USP Grade Lambda-like Carrageenan from Halymenia Durvillaei Bory de Sainte Vincent
Annabelle V. Briones, Wilhelma O. Ambal, Evangeline C. Monroyo,
Merle A. Villanueva, Romulo R. Estrella and Eduardo A. Lanto
Industrial Technology Development Institute, DOST Compound, Gen. Santos Ave.,
Bicutan, Taguig, Metro Manilo
ABSTRACT
A lambda-like carrageenan was produced from Halymenia durvillaei, a red seaweed that grows widely in almost all parts of the Philippines. The extraction procedure was optimized at a seaweed to hot water ratio of 1:40 (W/V). An average yield of 29.10% was obtained using two (2) extractions follwed by the precipitation of the carrageenan with isopropyl alcohol. The physicochemical properties of the product conform with the standrd lambda carrageenan obtained from Sigma Chemical Compoany and the USP specifications for carrageenan.
Carrageenan are extracts of red seaweeds found in various parts of the world. The most commerically important raw materials and their locales are Chondrus crispus from Canada, New England, France and Korea; Eucheuma cottonii and Eucheuma spinosum from the Philippines and Indonesia; Gigartina acicularis from Morocco and Gigartina radula from Chile. Extracts from these seaweeds are primarily sulfated polysaccharides of varying ester content that give the three basic types of carrageenans (kappa, iota, lambda) their interesting and unique properties (Modiiszewski 1983). . . . read more
