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dc.creatorHerscher, L. W.en_US
dc.creatorRuhl, H. D.en_US
dc.creatorWright, N.en_US
dc.date.accessioned2006-06-15T12:49:33Z
dc.date.available2006-06-15T12:49:33Z
dc.date.issued1957en_US
dc.identifier1957-B-4en_US
dc.identifier.urihttp://hdl.handle.net/1811/7596
dc.descriptionAuthor Institution: The Dow Chemical Companyen_US
dc.description.abstract“A new spectrophotometer is described and some demonstrations of its performance are given. The design embodies several new features directed toward improved quantitative accuracy of chemical analysis, particularly differential analysis. An arrangement for by-passing a small amount of radiation around the sample cell provides a dynamic balance at zero transmission; a means for automatic gain control during differential recording permits the beam-balancing servo to remain active through absorption bands of the reference material as deep as 95% absorbed; a new type of radiation attenuator is used which permits simpler optical design and provides exact linearity between pen movement and percent transmitted. Other features include improved scan-speed control, expansion of pen-travel in ordinate direction, and use of a non-linear $\lambda^{1/2}$ wave-length scale. Differential performance is demonstrated using the difficult example of an impurity of propylbenzene in ethylbenzene.”en_US
dc.format.extent89161 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleAN IMPROVED OPTICAL NULL INFRARED SPECTROPHOTOMETERen_US
dc.typearticleen_US


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