TheOrganic+vs.+an+Inorganic+Sunscreen.

=The Effectiveness of an Organic Compound Vs. an Inorganic Compound in Sunscreen=

Margaret and Allison
media type="file" key="fjk.wav" width="300" height="50" Abstract:

**THE EFFICIENCY OF AN ORGANIC SUNSCREEN VS. INORGANIC SUNSCREEN. Margaret. Allison.** The purpose of this lab is to test whether an organic or inorganic compound is more effective at blocking/absorbing UV-A Rays. Sets of zinc oxide and oxybenzone sunscreen were created and tested in this lab, since zinc oxide, an inorganic compound, re flects UV-A rays and oxybenzone, an organic compound, absorbs them. The sunscreen batches were develop ﻿ ed at 1%, 25%, and 40% active ingredient concentration. Highlighter fluid and a spectrometer were used to test how effective they were. 40% zinc oxide was found to be the most effective at blocking UV-A Rays. Due to experimental error though, oxybenzone was found to be ineffective at absorbing UV-A rays. 

Figure 1: Oxybenzone being measured first



Journal Article: []

Wise, A, Schank, P, Stanford, T, & Horsma, G. (2009). The science behind nanosun-screens.//Science Teacher//, //76 //(6), Retrieved from []

This article had good information on the nanoparticles in sunscreen. It also had data from an experiment done that was similar to the experiment done in our lab, which was a good reference.

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Uv information. (2011). //Skin Cancer Foundation //, Retrieved from <span style="font-family: Calibri,sans-serif; font-size: 11pt;"><span style="font-family: 'Times New Roman',serif; font-size: 12pt;">[]