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Abstract: Contamination in water poses a serious and mostly undetected threat. It is necessary for people to have an economical option to test the water they drink in their own homes. The goal of this research is to develop an economical device to detect contaminants like Lead, Fluoride etc that exceed EPA guidelines. At home usable devices to detect these levels are not available in the market.
Molecular bonds absorb energy and vibrate when exposed to infrared light. The vibrating bonds scatter light transmitted through them and cause frequency shift depending on the frequency of the transmitted light. The amount of scattering is unique to each kind of molecule and also varies with the concentration of the molecules.
A relationship between the frequency shift, the frequency of the transmitted light and concentration of Lead and Fluoride is established. Spot tests on filter paper were performed and a device was created that can capture the frequency shift by varying the frequency of transmitted light. The device is paired with an iPhone application using Bluetooth to calculate the either lead or fluoride content from prior calibration. This device successfully provided fairly accurate measurements for each sample, providing an affordable method to test the water supply at homes.
Keywords: Contamination in water, Economical device to detect contaminants. Lead/Fluori, EPA
References
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