NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ824967
Record Type: Journal
Publication Date: 2008-Feb
Pages: 3
Abstractor: As Provided
Reference Count: 46
ISSN: ISSN-0021-9584
A Simple Experiment in the Separation of a Solid-Phase Mixture and Infrared Spectroscopy for Introductory Chemistry
Szalay, Paul S.
Journal of Chemical Education, v85 n2 p285-287 Feb 2008
This experiment was developed as a means of incorporating instrumental analyses into an introductory chemistry laboratory. A two-component solid mixture of caffeine and ibuprofen is separated through a series of solution extractions and precipitation and their relative amounts measured. These compounds were chosen because the combination of caffeine and ibuprofen as an oral suspension has recently been investigated for pain relieving capabilities superior to those of ibuprofen alone providing a real-world context to the experiment. The solid components once recovered, dried, and weighed are analyzed using infrared spectrophotometry (IR). The goal of the IR analysis is to determine how effectively the two components were separated by comparing their spectra with the known spectra of the pure components. A guided-inquiry approach is utilized throughout the procedure for this experiment. (Contains 1 figure and 1 note.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Audience: Students; Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A