{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

25378352-MULTIPLE-EXTRACTION-OF-CAFFEINE-FROM-DRIED-TEA-LEAVES-USING-DICHLOROMETHANE

25378352-MULTIPLE-EXTRACTION-OF-CAFFEINE-FROM-DRIED-TEA-LEAVES-USING-DICHLOROMETHANE

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
MULTIPLE EXTRACTION OF CAFFEINE FROM DRIED TEA LEAVES USING   DICHLOROMETHANE AUTHORS:  Dizon, S., Donato, A.K., Dy, A., Enriquez, K.B., Fauni, M.B. ABSTRACT: Caffeine was extracted from dried tea leaves by multiple extraction technique. 10 g. of tea  leaves was boiled in a solution of 4.4 g. anhydrous sodium carbonate and 100 ml distilled water and  was extracted three times using 20 ml of dichloromethane. The residue was collected by decanting  the mixture of organic extract and anhydrous sodium sulfate and evaporating it to dryness. The  percentage yield was computed by getting the ratio of the weight of the crude caffeine (residue) and  weight of the tea leaves used. The percentage yield was 5.33%.  I.) INTRODUCTION Extraction is the process of obtaining  something from a mixture or compound using  chemical, physical, or mechanical means. The  theory   of   extraction   lies   in   the   concept   of  immiscibility between two phases to separate  a solute from the other phase. There are two  main types of extraction in chemistry namely:  Liquid-liquid   extraction   (also   known   as  Solvent   extraction   or   Partitioning),   which   is 
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern