THE DETERMINATION OF LOW-TEMPERATURE ULTRAVIOLET ABSORPTION SPECTRA WITH THE CARY SPECTROPHOTOMETER
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Date
1951
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Publisher
Ohio State University
Abstract
A low-temperature quartz cell has been developed which fits conveniently into the upper cell compartment of the Cary spectrophotometer. The cell has a path length of 4 cm; a vacuum jacket provides thermal insulation and a temperature can be regulated within a range of $\pm 5^{\circ}C$ by a controlled gravity flow of liquid nitrogen. The cell is being applied to the determination of the ultraviolet absorption spectra of polynuclear aromatic hydrocarbons in solution in binary mixtures of isopentane and methyl cyclohexane at temperatures down to $-170^{\circ}C$.
Description
Author Institution: Division of Chemistry National Research Council, Ottawa