tometers to produce a continuous ultraviolet (UV) spectrum. They are also known as D2 lamps.
How they work
Deuterium lamps are low-pressure gas-discharge lamps that use an arc discharge in deuterium gas.
The lamp's arc is the source of continuous light.
Deuterium lamps emit high-intensity UV radiation with a wavelength of 160 nm.
Why they are used
Deuterium lamps are used in UV spectrophotometers because they provide a stable and reliable UV spectrum.
They are also used in HPLC UV detection because the UV light they emit corresponds to the absorption spectra of many organic compounds.
How they compare to hydrogen lamps
Deuterium lamps are more expensive than hydrogen lamps, but they have a longer life span and a higher emissivity in the far end of the UV range.
How to maintain them
Deuterium lamps should be turned off when not in use for extended periods of time.
Leaving the lamp on continuously can decrease its useful life by about three times.
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