How to extract tannin from green tea leaves?

Question

Procedures on how to extract tannin from tea leaves? Specific and cite references please! Really appreciate it! Please take this seriously!

Right gel! Its for an investigatory project... But ours would be an impediment for rusting in metals and I kinda need the procedures to extract tannin from green tea leaves... Tnx very much!

Answer 1

hmm....let's see....,u will conduct an investigatory project for d science fair ryt? if u r planning to extract the tannin, u can use some processes (d best way for it is by decoction). r u planning to make dat tannin as a hair coloring or something???

Answer 2

Great questions. I answer them below: 1. You can't eat tea leaves. They are not healthy. When you brew tea, stuff like catechins, caffeine and thanine dissolve. The other stuff, like tannins and chlorophyll stay put. Some of these other stuff are harmful to human body. Don't eat them. Don't even over brew your tea. 2. Green tea nutrients oxidised over time after brewing, like an apple turning brown after you leave it for a while. Manufacturers often add ascorbic acid and sterilise tea before bottling. It is best to drink your green tea fresh and hot. 3. Drink loose leaf green tea. They are the healthiest. Green tea extract is less good, and here is why: - you can't be sure the quality of green tea they use to make the extract - there have been concerns about lead and fluoride content of some low grade green tea. - green tea contains more than 200 compounds and they interactive synergistically. Green tea extract may only contain the main compounds. - Scientific studies have found green tea health benefits in Asia, where people drink loose-leaf. There is no real proof that extract works. They might do, but the point is the regular green tea, especially loose-leaf, is better. Phew, I hope that helps. If you need more info, go to this link below and download the ebook. Julian

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Answer 3

If you are planning to use the tannins for dyeing cloth you can just soak them out with boiling water and time. If you still want the tea to drink? If you just want to see them try paper chromotography. They should precipitate out of a strong tea solution with a chemical that makes the tannins insoluble. They were used at some point in the tanning of leathers, so check historical accounts of tanning. Good luck

Answer 4

I dont have any chemical advice..but if you want to have a nice natural base for your tan from green tea..just bath in it..that's what i do..makes for a big tub clean up after words but it's well worth it.