Quinine contains rare earth compounds called phosphors. These substances glow when they are hit with particular wavelengths of the EM spectrum, including UV light. Beneath a black light, blood turns black, unless sprayed with luminol which gives it a blue-glow. Saliva, semen and urine also glow when hit with a black light.
Most biological fluids contain fluorescent molecules to help them glow. In early , FDA banned all prescription quinine products other than Qualaquin. FDA acted in this manner because of a perception that quinine is not effective for this condition and that its risk potential far exceeds its efficacy potential.
That blue glow comes from quinine, the substance that gives tonic water its bitter taste, shining by the process of fluorescence. Log In to Leave a Review. Explore Our Science Videos. Finding Pi Using Everyday Objects. How Far Can a Sneeze Go? Mini Popsicle Stick Drone. Introduction Have you ever been fascinated by things that glow in the dark?
It can be a lot of fun to play with bracelets, wands, and other toys that are glow-in-the-dark, like some stickers and creepy, crawly, plastic insects! Have you ever wanted to make something at home that glows? It turns out that it is not that hard to do — all you need is tonic water and a black light! What happens? If you have some left, under the black light you can compare the glow of the tonic water in the original bottle with the tonic water that has bleach mixed in.
Do they look very different? Overall, how did adding bleach to the tonic water change its glow under the black light? Extra: If you dilute tonic water with regular water, you can make the tonic water glow less brightly. What is the smallest amount of tonic needed as you dilute it with normal water for it to still visibly glow under an ultraviolet black light? Extra: Bleach is a type of chemical called an oxidizing agent. Some other common household oxidizing agents include hydrogen peroxide and OxiClean which contains sodium percarbonate.
When other oxidizing agents are added to tonic water, do they have the same effect on its glow under an ultraviolet black light that bleach does?
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Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels.
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