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A Graduated Cylinder Colorimeter: An Investigation of Path Length and the Beer-Lambert Law
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Abstract
A 10-mL graduated cylinder was used to construct a colorimeter to investigate the relationship between absorbance and path length found in the Beer-Lambert law. Light-emitting diodes (LEDs) were used as the light sources and filter monochromators. The experiments were conducted on intensely colored permanganate and tetraamminecopper(II) solutions. The device also was useful for demonstrating the relationship between absorbance and concentration.
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This article has been cited by 3 ACS Journal articles (3 most recent appear below).
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History
- Received: August 03, 2009
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