Building a Colorimeter: A Demonstration with Alternative Materials in the Classroom

Colorimetry is a technique based on Beer–Lambert’s
law and applied to various fields of science to determine the concentration
of substances. In this demonstration, two alternative colorimeters
based on Duboscq’s colorimeter are built and tested. The alternative
colorimeters demonstrated good performance when compared with tests
conducted on a commercial spectrophotometer, suggesting that they
could be used in high school and introductory science classes in higher
education.