Abstract

A Beckman Model DU quartz spectrophotometer has been modified to record absorption spectra from 210 to 2700 mμ automatically. This improvement has been achieved through replacement of the red-sensitive phototube with a lead sulfide cell, replacement of the ultraviolet-sensitive phototube with an IP28 photomultiplier tube, provision of a rotating, slotted drum to interrupt the light beam, and use of an electronic recorder. The null meter circuit of the spectrophotometer may be used if desired. All of the standard Beckman accessories may be used without modification.

In view of the demonstrated resolving power, the ruggedness, and the relative low cost of this modified instrument, it is believed to open a new field for analysis.

© 1951 Optical Society of America

An Automatic Relative-Transmission Attachment for the Beckman Model DU Spectrophotometer

Wilbur Kaye and R. G. Devaney
J. Opt. Soc. Am. 42(8) 567-571 (1952)

Modification of the Beckman Model DU Spectrophotometer for the Measurement of Interference Filters*

Hubert S. Moran
J. Opt. Soc. Am. 45(1) 26-27 (1955)

Near-Infrared Spectrophotometry with the Beckman Model DU Spectrophotometer

Wilbur Kaye
J. Opt. Soc. Am. 41(4) 277-277 (1951)

Measurement of Fluorescent Spectra of Liquids with a Modified Beckman DU Spectrophotometer*

Frank B. Huke, Robert H. Heibel, and Velmer A. Fassel
J. Opt. Soc. Am. 43(5) 400-404 (1953)

An Attachment to Permit the Examination of Liquid Films by a Beckman Model DU Spectrophotometer

H. G. McAdie and R. V. V. Nicholls
J. Opt. Soc. Am. 43(9) 767-768 (1953)