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Type: Artigo de periódico
Title: Correlation Of Measurements Of Absorbance In The Ultraviolet And Visible Regions At Different Spectral Slitwidths
Author: Strong III F.C.
Abstract: Assuming particular shapes for spectrophotometer beam dispersion and true absorption bands, hypothetical instrumental spectra can be calculated by computer integration. These can then be matched with experimental spectra and the process reversed to calculate true spectra. This has been done in the infrared using various beam dispersion shapes and Cauchy or combination Cauchy-Gaussian absorption band shapes. In this paper, a triangular beam and a Gaussian absorption band are assumed for the ultraviolet-visible. Results calculated from the integrations include: Tables for calculating true ratios of spectral slitwidth to absorption bandwidth from experimental values; equations for calculating true absorbances and true molar absorptivities; and error due to nonlinearlty of a Beer's law plot for a given ratio. After demonstrating a Gaussian shape for chromate absorption at 372 nm, the above calculations are applied to absorbances of various solutions measured on an instrument with a relatively wide spectral slitwidth.
Citation: Analytical Chemistry. , v. 48, n. 14, p. 2155 - 2161, 1976.
Rights: fechado
Date Issue: 1976
Appears in Collections:Unicamp - Artigos e Outros Documentos

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