(727b) Surfactant-Assisted Extraction of Lignan from Defatted Flaxseed with Micellar Solutions

Surfactant-assisted extraction of lignan
from defatted flaxseed with micellar solutions

Tzu-Chieh Chen, Bing-Hung Chen*

Department of Chemical Engineering, National Cheng Kung
University,

1 University Road, Tainan 70101, Taiwan

*e-mail: bkchen@mail.ncku.edu.tw (BHC)

Abstract

Surfactant-assisted extraction of lignan
from defatted flaxseeds was conducted using various edible surfactant solution
as the extraction media. The flaxseed lignin is mainly composed of
secoisolariciresinol (SECO) and secoisolariciresinol diglucoside (SDG). Both SDG
and SECO are antioxidant and phytoestrogen abundant in flaxseeds. During the
surfactant-assisted extraction procedure, the defatted flaxseeds were immersed
and constantly agitated in surfactant solutions to extract lignan. Explicitly,
the lignan of the defatted flaxseed was solubilized by micellar solution, from
which aliquots were drawn periodically for HPLC-analysis to determine the
content of lignin extracted. As a result, the extraction process mainly follows
the kinetics of the first-order reaction. Among various surfactants used, Tween
20 gives the best extraction efficiency, followed by Tween 80. 

Keywords: Flaxseed, Surfactant, Extraction, Lignan, Secoisolariciresinol,
Solubilization.

Figure 1. Effect of extraction media
to the extraction yield of lignin.

Extraction
condition: (1) Temperature
= 30 ¢XC, (2) Flaxseed : Extraction medium = 1 : 50 (w/v), (3)
Duration = 1 day, (4) Surfactant concentration = 1 wt%.