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resources:eval:user-guides:circuits-from-the-lab:cn0503 [17 Nov 2021 01:08] – [Optical Path 3] Brandon Bushey | resources:eval:user-guides:circuits-from-the-lab:cn0503 [20 Sep 2022 15:24] (current) – adding nitrate demo link Brandon Bushey | ||
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==== Optical Path 3 ==== | ==== Optical Path 3 ==== | ||
In optical path 3, the experiment shows nitrate detection using colorimetry. Using the API reagent found in nitrate test kits, a solution with a higher concentration of nitrate turns into a darker shade of red. As a result, the degree of absorbance of 615nm light decreases with the increasing nitrate concentration. | In optical path 3, the experiment shows nitrate detection using colorimetry. Using the API reagent found in nitrate test kits, a solution with a higher concentration of nitrate turns into a darker shade of red. As a result, the degree of absorbance of 615nm light decreases with the increasing nitrate concentration. | ||
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==== Optical Path 4 ==== | ==== Optical Path 4 ==== | ||
In optical path 4, the experiment shows turbidity measurements of cloudy water made by adding a a drop of milk and de-ionized water using 530nm light. | In optical path 4, the experiment shows turbidity measurements of cloudy water made by adding a a drop of milk and de-ionized water using 530nm light. | ||
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===== Schematic, PCB Layout, Bill of Materials ===== | ===== Schematic, PCB Layout, Bill of Materials ===== |