“…The purpose of this study was to investigate quantitatively the ethanol-mediated interaction between dextroamphetamine sulfate and spray-dried lactose using diffuse reflectance spectrometry. Theoretical considerations for the quantitative use of the diffuse reflectance equations were discussed and derived previously by several authors (9)(10)(11)(12)(13)(14). The best known theory was developed by Kubelka and Munk (15,16).…”