Determination of the complex refractive index of highly concentrated hemoglobin solutions using transmittance and reflectance measurements

The complex refractive index of highly concentrated hemoglobin solutions as they appear in red blood cells are determined in the wavelength range of $250to1100nm$ using transmittance and Fresnel reflectance measurements. The determined real parts of the refractive indices are on average $0.02units$ higher than the values found in the literature. The wavelength dependence of the measured data in the UV region differs from the calculated data using the Kramers-Kronig relation.