The invention discloses a method for comprehensively extracting
fucoxanthin and
fucoidan from
sargassum. The method for comprehensively extracting
fucoxanthin and
fucoidan from the
sargassum is characterized by comprising the following steps: unfreezing fresh
sargassum or frozen sargassum at
room temperature, washing with clear water, and controlling
moisture content of the sargassum to be 50-90%; adding the sargassum into
ethanol water, shaking up, wrapping a conical flask with tinfoil, putting the conical flask into a shaking table, extracting for 1-8 hours at normal temperature, and filtering to obtain filtrate; carrying out vacuum concentration on the filtrate until a large amount of
black substance is separated out, and continuously carrying out vacuum concentration until red
solid, namely high-purity
fucoxanthin, is separated out; putting filter residue into a
Soxhlet extractor, refluxing with
ethanol water, extracting for 1-5 hours at the temperature of 60-90 DEG C, soaking and extracting the extracted
solid matter in water for 3-8 hours at the temperature of 60-90 DEG C, filtering, centrifuging, taking supernate, carrying out vacuum concentration, adding
ethanol, uniformly mixing, filtering, taking filter residue, washing with ethanol, and
drying, so that the
fucoidan is obtained. The method for comprehensively extracting the fucoxanthin and fucoidan from the sargassum has the advantages that
raw material utilization rate is high, the extraction efficiency is high, and the method is simple and feasible.