Determination of refractive index and concentration of iodine solutions using opals

作者：Kepinska Miroslawa^*; Starczewska Anna; Szala Janusz

来源：Optical Materials, 2014, 36(5): 932-935.

DOI：10.1016/j.optmat.2013.12.036

• Photonic crystals
• Opal
• Optical spectroscopy
• Refractive index
• Ethanol-iodine solutions

The determination of refractive index of iodine-ethanol solutions using SiO2 opals has been presented. For the first time concentration of solution iodine in ethanol has been determined by applying a simple method of using opal and de Feijter's relation. Basing on wavelength of diffraction peaks the appropriate formula describing concentration of iodine ethanol solution has been evolved. The uncertainty of the determined concentration has been established, too. The coefficient dn(c)/dC = 0.0201(4) (% w/w(-1)) of the linear dependence between refractive index and the concentration of iodine solution has been determined. The procedure of calibration of the used opal sensor is described. The opal sensor is not distracted by the measurement and can be used repeatedly.

• 出版日期2014-3