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After the orange petals are peeled off, they are separated one by one. Be careful not to peel them. You can first remove the obvious white meridians on the orange petals.
The separated orange petals can be soaked in 0.25% hydrochloric acid solution at room temperature, and the time depends on the changes of the pickled capsules, generally about 30~50 minutes. Acid soaking can dissolve pectin between capsule coat and juice cells, so that it expands and separates, and it can end when capsule coat wrinkles and juice cells separate. After taking it out, rinse it with clear water for 5 times, and then immerse it in 0.75% sodium hydroxide solution at room temperature for about 5 minutes or less. The function of alkali leaching is to dissolve and peel off capsules. If the alkali concentration is too high or the time is too long, it can also dissolve the cell wall of the juice, but it will break the juice and rupture the capsule. After soaking in alkali, rinse with clear water for five times, and soak the residual lye. The concentration of hydrochloric acid and sodium hydroxide in the experiment is very low, and it can be used safely after repeated washing.
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After removing the capsule coat, rinse the capsules, then pick out the capsules, pick out the deformed and broken capsules, extract the seeds carried by a few capsules, and then put the pulp into ordinary empty cans.
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After that, the sugar solution is generally ready-made. The concentration of canned sugar solution is about 12~ 16%, and the canned concentration is 25%.
Add the prepared sugar solution into the glass bottle with pulp, cover the bottle cap, but don't tighten it, put it in a pot with water, boil it for 10 minute, take out the bottle, tighten the bottle cap, and cool or refrigerate.
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