As part of an assignment through the Technology and Research program at Horten Upper Secondary School, I designed and developed a scientific colorimeter that measures the concentration of protons in a liquid solution using Beer Lambert’s Law and regression. The wireframe drawing of the colorimeter is shown below.
In order to use the colorimeter, the user first has to position the cuvette with the liquid solution in the cuvette chamber displayed in the image below. Further, the colorimeter automatically detects the cuvette and descends it down into the cuvette body to eliminate light which may affect the precision of the measurement. Then after the measurement procedure, the cuvette ascends, and the calculated concentration is displayed on the LCD display imaged below.
The colorimeter is programmed in C++ and consists of an Arduino module. The colorimeter can be connected to a computer in order to visualize the measurements and concentration as a graph.
The colorimeter was used to conduct research on different liquid solutions through a disciplinary Chemistry and Technology & Research assignment. As part of the assignment, I wrote a 20-page report explaining the theory behind Beer-Lambert Law and how I implemented the theoretical chemistry aspects with the creation of physical technology to find the concentration of protons in a liquid solution.
