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What is deuterium light source?
Deuterium lamps are light source lamps that utilize an arc discharge in deuterium (D2) gas. They emit an intense spectrum in the UV region and have feature of unrivaled stability compared to other UV light sources.
How do arc lamps work?
In a carbon arc lamp, the electrodes are carbon rods in free air. To ignite the lamp, the rods are touched together, thus allowing a relatively low voltage to strike the arc. The rods are then slowly drawn apart, and electric current heats and maintains an arc across the gap.
Why do we use deuterium lamps in UV spectroscopy?
Deuterium lamps are always used with a Tungsten halogen lamp to allow measurements to be performed in both the UV and visible regions. Also known as quartz Iodine lamps, these measure most effectively in the visible region from 320 – 1100 nm.
What is hydrogen lamp?
The Hydrogen lamp is a long glass tube filled with Hydrogen gas that is stimulated electrically. Hydrogen lamp can be used for wavelength calibration in the UV range as it radiates continuously in that range. By contrast, the Hydrogen lamp does not produce a continuous visible spectrum, but discrete lines.
Which lamp is used in visible spectroscopy?
Light source Two kinds of lamps, a Deuterium for measurement in the ultraviolet range and a tungsten lamp for measurement in the visible and near-infrared ranges, are used as the light sources of a spectrophotometer. A continuous spectrum of 300 – 3,000 nm is emitted.
Which lamp is used in HPLC?
Deuterium lamps
Deuterium lamps emit an almost continuous spectrum of light ranging from the main UV wavelengths of 160 – 400 nm to the visible spectral range (800 nm). This makes them the ideal light source for high precision absorption measurements, e.g. in HPLC.
Which lamp is used in UV?
Two kinds of lamps, a Deuterium for measurement in the ultraviolet range and a tungsten lamp for measurement in the visible and near-infrared ranges, are used as the light sources of a spectrophotometer. A continuous spectrum of 300 – 3,000 nm is emitted.
Why deuterium lamp is used in HPLC?
They generate a continuous spectrum with wavelengths ranging from UV to visible light, making them the ideal light source for high-precision absorption measurements in the laboratory.
Which is better HPLC or GC?
GC is used for volatile compounds (those that break down rapidly) while HPLC is better for less volatile samples. If a sample contains salts or carries a charge, it must be analyzed using HPLC, not GC.
What kind of light source is a deuterium lamp?
Deuterium lamps are light source lamps that utilize an arc discharge in deuterium (D2) gas. They emit an intense spectrum in the UV region and have feature of unrivaled stability compared to other UV light sources.
How is the ARC distribution of a deuterium lamp determined?
Arc distribution of deuterium lamps is determined by the aperture (light exit) size. At the same input current and voltage, lamps with a 0.5 mm aperture provide 1.4 times higher intensity than lamps with a 1.0 mm diameter aperture.
Which is the source of light in a D2 lamp?
In bulbs usually the filament is the source of light but in case of D2 Lamp the arc formed is the source of continuous light. D2 lamps usually comes in handy when a continuous spectrum is needed in the ultraviolet region.
What kind of light source is a carbon arc lamp?
The carbon arc lamp is now obsolete for most of these purposes, but it is still used as a source of high intensity ultraviolet light. The term is now used for gas discharge lamps, which produce light by an arc between metal electrodes through an inert gas in a glass bulb. The common fluorescent lamp is a low-pressure mercury arc lamp.