Ultrafiltration of mango flavor compounds

Date

10-1997

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Ernesto J Del Rosario

Abstract

ABSTRACT

PADLAN, CAROLINE PRADO. College of Arts and Sciences, University of the Philippines Los Bafios, October 1997. Ultrafiltration of Mango Flavor Compounds.

Adviser : Dr. Ernesto J. del Rosario

Co-adviser: Dr. Hidelisa P. Hernandez

Freshly prepared mango puree was found to contain 3-carene, limonene and a-terpinene with GC peak areas of 214, 198 and 95, respectively, using gas chromatography. The stored sample of purchased mango puree contained lower amounts of 3-carene, limonene and a-terpinene with GC peak areas of 41, 37 and 21, respectively. The results indicate changes in relative amounts of the flavor compounds of mango during processing and storage of the mango samples.

The centrifuged and stored mango puree was ultrafiltered using two types of commercial membranes namely, cellulose acetate (CA) and polysulfone (PS). The water flux values of the two membranes were: 9.3 ± 1.7 1../m2-h for CA and 5.122 ± 0.016 Um2-h for PS. Viscosity values of 0.995 ± 0.012 cp and 0.89 ± 0.08 cp were obtained for the permeates using CA and PS membranes, respectively; these values are approximately 1/100-fold of the viscosity of fresh mango puree and indicate membrane rejection of polymeric compounds. Total sugar rejection values of 0.44 ± 0.02 were obtained for CA membranes (MW cut-off 10,000 kD) and 0.42 ± 0.02 for polysulfone membranes (MW cut-off 15,000 kD).

Ulltrafiltration (UF) of aqueous solutions of standard terpene compounds namely, 3-carene, limonene and a-terpinene (purity of 99%, 97% and 85%, respectively) showed rejection values of 17 % for CA and 2.1% for PS membrane. UP of stored mango puree likewise showed significant permeation of the terpene compounds through CA membrane (0.77% of initial solute concentration permeated across the membrane) but negligible passage through PS membrane. These differences in membrane permeabilities were discussed based on the hydrophobic interaction (adsorption) between the terpene solutes and the membrane.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1997 C4 P33

Document Type

Thesis

This document is currently not available here.

Share

COinS