Abstract

Relative, specular reflectances of individual 0.5M aqueous solutions of K₂SO₄ and NH₄H₂PO₄ and of 3M H₂SO₄ were measured in the 2-20-μm region of the infrared for polarized radiant flux having the electric field vector perpendicular to the plane of incidence. Distilled water was the reflectance standard. The angle of incidence was 70.03° ± 0.23°. Kramers–Kronig analysis of the relative reflectance spectra provided phase-difference spectra for the aqueous solutions and a tabulation of spectral values relative to air for the index of refraction and extinction coefficient. The strengths of selected infrared bands of the solutes were determined by integrating values for the molecular extinction coefficients over the spectral regions of the bands.

© 1974 Optical Society of America

Complex refractive index in the infrared for NaCl, NaNO₃, and NaHCO₃ in water*

Marvin R. Querry, Wayne E. Holland, and Richard C. Waring
J. Opt. Soc. Am. 66(8) 830-836 (1976)

Optical Constants in the Infrared for Aqueous Solutions of NaCl†

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J. Opt. Soc. Am. 62(7) 849-855 (1972)

Infrared optical constants of a ternary system of 75% H₂SO₄, 10% HNO₃, and 15% H₂O

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Infrared optical constants of aqueous solutions of sodium sulfate

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J. Opt. Soc. Am. 72(7) 893-894 (1982)

Optical properties of water in the near infrared*

Kent F. Palmer and Dudley Williams
J. Opt. Soc. Am. 64(8) 1107-1110 (1974)