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Instrument Database:
Spectral Systems Peter R. Perzl - dc-Arc System DCA-301
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| Year of introduction |
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| Status |
available |
| Company |
Spectral Systems Peter R. Perzl
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| Categories |
Sample introduction: Arc/Spark ablation
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- direct solid-sample-analysis with optical spectrometers
- coupled via UV fibre optic to the spectrometer
- a powerful, classical method
- add-on system for OES-spectrometers, e.g. ICPs
- no digestion of solid samples
- sample-weight 3-10 mg in graphite carrier-electrode
- autarchic system with modern technology
In a desktop-housing with the dimensions 68x68x64 cm there are quick-change electrode holders that can be adjusted from the outside, also a special optics in 90-degree-configuration (for the suppression of the arcs fluctuations), the electronic gas control for argon and reaction-gas (option), a power-supply of about 1.5 to 30 Amps in a fast and modern solid-state-technology and the ignition-unit. In the front door there is a focusing screen on which the electrode-gap is being viewed by a projection-optic to be controlled and adjusted from the outside while operation. The lower electrode-holder - optional also the upper one - is adjustable from the outside; both are water-cooled. The lower electrode holder is configured as a Stallwood-nozzle which is designed as a changeable cap.
On request a version with a special laminar-nozzle is available. By this or by the standard-nozzle the arc is burning in a quartz-telescope-tube and is being protected from the atmosphere by a shielding- resp. reaction- gas-stream. So the formation of disturbing Cyan-bands is being suppressed and the arc is being stabilised. As a standard the system DCA-301 comes equipped for electrodes with a diameter of 6 - 6,3 mm, other diameters on request.
The arc-current is program-controlled by arbitrary current-ramps and constant levels. In the same way up to two process-gases (e.g. argon and oxygen) are electronically controlled.
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