Bio Project
Bio Project
Bio Project
KENDRIYA VIDYALAYA
AFS
KENDRIYA V HAKIMPET
BIOLOGY INVESTIGATORY PROJECT
2019-20
TO DETERMINE CONTENT OF CAFFEINE
IN DIFFERENT TEA SAMPLES
ROLL NO. :
CERTIFICATE
It is hereby to certify that, the original and genuine
investigation work has been carried out to
investigate about the subject matter and the related
data collection and investigation has been completed
solely, sincerely and satisfactorily done by
AYUSHI MISHRA of Class XII, Kendriya
Vidyalaya AFS Hakimpet, regarding the project
titled, “ TO DETERMINE THE CONTENT OF
CAFFEINE IN DIFFERENT SAMPLES OF
TEA.”
___________________ ________________
SIGNATURE OF INTERNAL signature of external
EXAMINER EXAMINER
_________________
SIGNATURE OF PRINCIPAL
ACKNOWLEDGEMENT
The successful completion of any task would be
incomplete without mentioning the names of those persons
who helped to make it possible. I take this opportunity to
express my gratitude in few words and respect to all those
who helped me in the completion of this project.
Last, but not the least, I would like to thank CBSE for
giving us the opportunity to undertake this project.
CONTENTS
Aim
Apparatus & Chemicals Required
Introduction
Theory
Procedure
Observation
Inference
Bibliography & References
AIM
TO DETERMINE THE
CONTENT OF
CAFFEINE IN
DIFFERENT SAMPLES
OF TEA….
APPARATUS REQUIRED
1 . Round Bottom Flask
CHEMICALS REQUIRED
1.Basic Lead Nitrate
2. Lead Oxide
3. Chloroform
4. Distilled water
5. Animal Charcoal
6. Dilute Mineral Acid
INTRODUCTION
Tea is a highly popular drink all over the world. A cup of tea
is often taken as a mind-freshener. This can be primarily
attributed to the presence of a stimulant called
CAFFEINE in the tea. Besides this tea also contains
various polyphenolic compounds that act as flavourings
agents. Relative contents of these compounds result in
different varieties available under different brand names.
Uses of Caffeine :
1. In medicine, it is used to stimulate, central nervous
system and to increase flow of urine.
The solution is boiled, and the lead oxide is added slowly to the
boiling solution with constant stirring.
References
The references of the sources are as follows:
Books:
Together With Lab Manual Biology - XII
Comprehensive Biology - 12
Internet sources:
www.wikipedia.org
www.google.com
www.yahoo.com