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Soxhlet Extraction of Caffeine from Beverage Plants

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D.J. Adam and J. Mainwaring

Department of Science and Mathematics, Halton College of Further Education,Kingsway, Widnes, Cheshire WA8 7QQ, U.K.

Michael N. Quigley

Department of Chemistry, Richard King Mellon Hall of Science,Duquesne University, Pittsburgh, PA 15282

J. Chem. Educ., 1996, 73 (12), p 1171

DOI: 10.1021/ed073p1171

Publication Date (Web): December 1, 1996

Section:

History, Education, and Documentation

Abstract

A simple procedure is described for the extraction of caffeine from coffee beans or granules, tea leaves, mat leaves, etc. Since dichloromethane and several other hazardous substances are used, the procedure is best performed in a fume hood. Following extraction, melting point determination of the crystalline precipitate establishes its positive identity. Includes 33 references.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Organic Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Separation Science

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