Procedure
1) Select the wave length desired, establishing baseline absorption with the control
2) Determine absorption by the unknown.
3) Limit data to the UV range.
4) Material can be spread onto the inside wall of the cuvettes with a cotton swab (simulating the type of coating which would be used on a sunbather's body).
Materials
1. Spectrophotometer
2. cuvettes
3. cotton swabs
4. several brands of sun screens
Monday, October 6, 2008
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