By Harry G. Hecht (auth.), Wesley W. Wendlandt (eds.)
This quantity comprises all the papers awarded on the American Chemical Society Symposium on Reflectance Spectroscopy. The Symposium was once offered below the sponsorship of the department of Analytical Chemistry, and used to be hung on September eleven and 12,1967, on the 154th nationwide assembly of the yankee Chemical Society, Chicago, Illinois. The papers awarded herein symbolize a renaissance of curiosity in reflectance spectroscopy. The techni~ue of reflec tance spectroscopy isn't really, in fact, a brand new techni~ue, notwithstanding, it has in simple terms been utilized to difficulties of a chemical curiosity within the final decade or so. The instrumentation for this techni~ue within the ultraviolet, noticeable, and close to infrared areas of the spectrum has been to be had for a few years. New and interesting learn is being performed this present day to increase those techni~ues to the infrared and much infrared areas in addition. it's a excitement for the Editor to precise his gratitude to Drs. John ok. Taylor and E. C. Dunlop of the department of Analytical Chemistry, ACS, for his or her cooperation in making the Symposium a fact. the help of pass over Julie Norris of the collage of Houston for her typing and manuscript organi zation ability is significantly preferred. And finally, yet not at all the least, the Editor want to recognize the coopera tion of the entire participants to this quantity. definitely with out their cooperation, this Symposium shouldn't have been a success.
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Additional resources for Modern Aspects of Reflectance Spectroscopy
The thickness in the case of a sheet or layer). Finally, for reasons given later, the absorption in a layer of the medium should be small as compared with the scattering power of that layer. Discussion of Implications of the K-M Theory Under circumstances where, of necessity, the medium must be illuminated unidirectionally, and the medium itself departs widely from the ideal described in the foregoing paragraph, special extension of the theory is clearly necessary. Undoubtedly thy most notable of special developments is the theory of DuntleyllO).
R. G. Giovanelli and Prof. Dr. G. Kortum for supplying me with helpful correspondence and reprints of their numerous researches relating to reflectance spectroscopy. REFERENCES 1. G. Kortum and H. Schott1er, 2. G. Kortum and J. Vogel, ~. ~. , 1L, 353 (1953). Physik. Chern. (Frankfurt), 1&, 230 (1958). 3. E. Pitts, Proc. Phys. , 4. R. G. Giovanelli, Optica Acta, 5. W. W. Wendlandt and H. G. Hecht, "Reflectance Spectroscopy," ~, ~, ~, 105 (1954). 153 (1955). Interscience Publishers, New York, 1966.
1190-67. 53 54 WESLEY W. WENDLANDT where I is the reflected radiation, 10 is the incident radiation, k is the absorption coefficient, and s the scattering coefficient. The absorption coefficient is the same as that given by the familiar Beer-Lambert law, T = e-kd The regular reflection component is governed by one of Fresnel's equations (2) where n is the refractive index, and K is the absorption index, defined through Lambert's law, I = I exp [ -41TnKd/ A. o 0 ] The A. denotes the wavelength of the radiation in vacuum and d is the l~yer thickness.
Modern Aspects of Reflectance Spectroscopy by Harry G. Hecht (auth.), Wesley W. Wendlandt (eds.)