Absorption Spectra of Some Organic Solutions in the Vacuum Ultraviolet

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Abstract
A search for a suitable solvent for extending the absorption curves of some organic compounds into the vacuum ultraviolet led to the discovery that n-hexane and n-heptane give satisfactory transmission to 1700A, in 0.3-mm cells. The transmission limits of several solvents are given; and the absorption curves in this region are plotted for a number of organic compounds, showing especially the double-bond peak at 1840A from octene-3. It is demonstrated that a fluorite spectrograph of the Cario-Schmitt-Ott design is fast and convenient to use in such studies and is therefore well suited to routine quantitative analysis in this region (2500–1700A) when low dispersion (20A/mm) is acceptable.