1. Extraction of caffeine
I don’t feel sleepy!!!
Extraction of caffeine
Ito Takumi
Sawada Taiki
Takahashi Yusuke
（Hayashi Haruka）

2. This effect is caused by caffeine!
We are sometimes sleepy during class.
And we drink energy drink or coffee.
　　We are not sleepy at all.
・We often watch energy drinks and coffees in the dust box during test week. This effect is cause of caffeine.

3. wrap up
We　are　interested　in　Caffeine　and researched the amount of it included in personal belonging　drinks.
We wonder that what drinks include caffeine and how much quantity is included. Then we did experiment through two ways.

4. The first experiment
①We prepared 30 g of samples and water 500 g. ↓ ②We mixed them and heated up. ③We cooled it for ten minutes. ④Using gauze, filtered it. ⑤We vaporized it.

5. ・With sublimation technique, we could not see crystal of caffeine.
So….
We used a distillation method.

6. The second experiment
①We use coffee, tea ,barley tea(non caffeine) and tea.Ｗe measure 30g of them and 500g of water.Ｔhen we heat water.
②Before boiling, we put them in the beaker.
We left it for 10 minutes.
30ｇ
500ｇ

7. ③We filter it by gauze and cool it slowly
③We filter it by gauze and cool it slowly. ④We filtered under reduced pressure using a filtration flask, Buchner funnel.
⑤We extract caffeine bｙ
chloroform.

8. ⑥We filter layer of chloroform that we take by diatomaceous earth.

9. ⑦We add Sulphur trioxide sodium to it and remove water.
⑧We removed chloroform using
distillation under reduced pressure method with rotary evaporator and regard it as caffeine.

10. Ｔｅａ　
Ｇｒｅｅｎ　ｔｅａ
Ｂａｒｌｅｙ　ｔｅａ
Ｃｏｆｆｅｅ

11. Future problem
We want to measure mass of caffeine in future. In addition, we want to remove it because impurities are included in a material with the viscosity.

12. Thank you for listening★