Class: BE210
Group: W6
Members: FACILITATOR
..
Uduak
Umoh
TIME & TASK KEEPER John Pan
SCRIBE ..Anupam Gupta
PRESENTER .Courtney Morgan
Date: May, 2001
Abstract:
The optimal extraction method of the biological pigment, betanin was
determined to be heating the beets in aqueous solution. Also, there
exists a linear dependence of the visible spectra on pH. The linear
relationship is that for organically grown beets (lmax)=1.281(pH)+531.34
and for non-organically grown beets (lmax)=1.878(pH)+527.63; however there
are statistically insignificantly different from each other according to
their respective 95% confidence intervals of 0.622-1.940 and 1.484-2.273,
respectively. In addition, the relationship between absorbance and
molar extinction coefficient*concentration was determined to be (Absorbance)=0.0189(%Working
Solution Concentration) + 0.0027 with the slope having a 95% confidence
interval of 0.01882-0.01892. Lastly, no pKa values could be determined
from the titration curve of betanin.