Question

Which of the following would be an appropriate combination of source and detector for UV absorbance...

Which of the following would be an appropriate combination of source and detector for UV absorbance spectroscopy?

A. none of these combinations are appropriate for UV absorbance spectroscopy

B. tungsten lamp and phototube

C. silicon carbide globar and bolometer

D. deuterium arc lamp and photodiode array

E. tungsten lamp and photomultiplier tube

F. all of these combinations are appropriate for UV absorbance spectroscopy

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Answer #1

A deuterium arc lamp produces consistent intensity over the entire UV range (190 to 380 nm). Silicon Carbide Globar (500 - 9000 nm) cannot be used as a UV source and a Tungsten lamp (320nm to 1100 nm ) covers only a part of UV spectrum. Also, Photodiode detectors have a wider dynamic range detection with good sensitivity. Therefore, the appropriate combination of source and detector for UV absorbance spectroscopy is

D). Deuterium arc lamp and photodiode array

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