MODIFICATION OF A BECKMAN MODEL-DU SPECTROPHOTOMETER FOR AUTOMATIC OPERATION AT $220-2050 \mu$
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Publisher:Ohio State University
A Beckman Model-DU quartz spectrophotometer has been modified to record automatically absorption spectra from 220 to $2050 \mu$. This improvement has been achieved through replacement of the red-sensitive phototube with a lead sulfide cell, 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 In the near-infrared region, the ruggedness, and the relative low cost of this modified instrument, it is believed to open a new field for analysis.
Author Institution: Tennessee Eastman Company
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