What question did this study set out to answer?

To construct and test a versatile colorimeter that measures absorbance in solutions.

Constructing and Testing a Versatile Colorimeter

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This project demonstrates a low-cost colorimeter for measuring absorbance in solutions, indicating potential for widespread use.

To construct and test a versatile colorimeter that measures absorbance in solutions.
Constructed a colorimeter with a standard cuvette and a light source.
Utilized a green LED and a detector (photocell or photoresistor).
Employed digital multimeters for voltage and resistance measurements.
Performed tests on potassium permanganate solutions using the constructed colorimeter.
Demonstrated linear relationships between absorbance and the logarithm of resistance.
Results were comparable to those from a Spectronic 20 spectrophotometer.
Total construction cost of the colorimeter was approximately $20.

Schneider et al. (2017) studied this question.

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