To validate the computational results, 12 different phantoms were constructed in order to perform an experimental analysis of sampling depth for DRS of varying SDS. The phantoms were composed of 5-mL solutions of water, India ink (Salis International, Golden, Colorado), and scattering microbeads (Polyscienes, Warrington, Pennsylvania), which spanned absorption and scattering values across a range consistent with those normally found in human tissue. Mie theory was used to determine the scattering properties of the diameter beads. Mix ratios of water and microbeads were determined so that three different scattering spectra from 11 to were achieved at the reference wavelength of 630 nm. Each of these mix ratios was prepared with four different concentrations of India ink, so that the absorption coefficient for the samples ranged from 0 to , resulting in 12 total phantoms with different scattering and absorption properties, as seen in Table 1.