Abstract
MESSRS. Adam Hilger, Ltd., have published an interesting booklet dealing with the outfits they supply for absorption Spectrophotometry in the visible and ultra-violet regions. The most important new instrument which is described is a form of ultra-violet spectrophotometer, working on the principle of the variation of the aperture of the beam, for which the name Spekker has been registered. This has been designed primarily for use with Hilger's medium quartz spectrographs, but may be attached to any similar instrument of sufficiently great aperture. Judging by the description of the instrument, and by a specimen set of absorption photographs for benzene in hexane, this should be both highly convenient to use and accurate in the results it yields. A photoelectric outfit is also described, although not very enthusiastically, the opinion being expressed that the use of a photoelectric cell in place of the eye or a photographic record diminishes the likelihood of a number of important sources of error being recognised, so that there is a liability that copious and apparently highly accurate results may be amassed which are actually unreliable. Other devices listed include Bay and Steiner's hydrogen discharge tubes for providing continuous ultra-violet sources of light, and also a micrometer liquid cell for studying the absorption of thin layers of liquid.
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Apparatus for Absorption Spectrophotometry. Nature 129, 231–232 (1932). https://doi.org/10.1038/129231d0
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DOI: https://doi.org/10.1038/129231d0