The UNC School of Pharmacy Compounding Lab
Spectrophotometry as an
Analytical Tool
When you zero a "blank" cell before making the reading of your sample, what do you accomplish?

(The question will be correctly answered when all of the correct choices have been marked).
measure the amount of the drug you are analyzing
test for the presence of other solvents in the sample that are not the drug you're analyzing
 determine the correct amount of drug to place in your samples
 test for solutes that are not the drug you're analyzing
test for which wavelengths the solvent is useless