The DE of the pectins was affected by the extraction temperature
and raw materials. When the temperature increased from
100 C to 140 C, the DE of CPP increased firstly then decreased, in
which the highest DE of 74.74% was obtained at 120 C. While for
APP, the DE of APP increased with temperature increase, in which
the highest DE of 89.69% was obtained at 170 C. Because the DE of
CPP and APP were more than 50%, they were classified into high
ester-methyl pectin and thus affected their properties, for example,
higher sugar concentration and lower acidic condition were needed
for their gel formation