ERIC Number: EJ1108391
Record Type: Journal
Publication Date: 2016-Jul
Abstractor: As Provided
Construction and Characterization of a Compact, Portable, Low-Cost Colorimeter for the Chemistry Lab
Clippard, Carrie M.; Hughes, William; Chohan, Balwant S.; Sykes, Danny G.
Journal of Chemical Education, v93 n7 p1241-1248 Jul 2016
A low-cost and portable colorimeter was constructed featuring a low-voltage programmable color light sensor-to-frequency converter, a CMOS 8-bit microcontroller, and an LCD display. The instrument has successfully facilitated the introduction and application of spectroscopy to groups of middle school, high school, and undergraduate students. A series of tried and tested laboratory experiments that demonstrate the utility and capabilities of the colorimeter have been developed. These laboratories not only help characterize the colorimeter but also feature challenging problems that allow students to realize the limitations of analytical instruments. The accompanying laboratories enable students to determine the concentration of a mixture of food dyes using simultaneous equations, quantify inorganic phosphate in various aqueous-based agricultural samples, calculate the concentration of salicylic acid in facial acne medication, and elucidate the stoichiometry of an iron salicylate reaction.
Descriptors: Chemistry, Laboratory Equipment, Cost Effectiveness, Light, Lighting, Spectroscopy, Material Development, Computation, Equations (Mathematics), Measurement Techniques
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: firstname.lastname@example.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Research
Education Level: Secondary Education; Higher Education
Authoring Institution: N/A
Identifiers - Location: Pennsylvania