PG Instruments - 990
Manufactured by PG Instruments
The PGI 990 Atomic Absorption Spectrophotometer is available in the following...
The PGI 990 Atomic Absorption Spectrophotometer is available in the following configuration:
- Flame Only
- Graphite Furnace
- Combined Flame and Graphite Furnace with the option for up to nine heating ramps.
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Features of 990
- The flame and graphite furnace is integrated into one instrument. The change over from one technique to another is carried out by simple keystrokes within the software.
- The instruments have a motorized 8 hollow cathode lamp turret which allows the automatic positioning and optimization of each hollow cathode lamp by the software.
- The control of the gas flows for the fuel gas (C2 H2) and the positioning of the burner is also carried out directly from the software thus allowing optimization of the instruments for the best analytical parameters for a selected analysis.
- Two methods of background correction are available. The first utilizes a deuterium lamp and the second is the proven method of self reversal.
- The location of the wavelength and peak selection is automatic and controlled from the software.
- The spectral bandwidth is automated and is available with a choice of five slit sizes.
General Specifications
| Graphite Furnace | 1 |
| Lamps | 8 hollow cathode lamp turrets with 2 lamps simultaneously lit ( one lamp pre-heated ) |
| Maximum Temperature | 2650 °C |
| Power Requirements | 110V/60Hz or 220V/50Hz three-phase AC |
| Peak Power | 5000 W (graphite furnace) |
| Wavelength Range | 190 to 900 |
Additional Specifications
[u]Dimensions[/u]
mainframe: 110 cm x 50cm x 45cm
graphite furnace: 50cm x 50cm x 45cm
Monochromator: Czerny-Turner configuration
Spectral Bandwidth: 0.1nm, 0.2nm, 0.4nm, 1.0nm, 2.0nm (5 steps. with automatic changeover)
Wavelength Accuracy: 0.25nm
Wavelength Repeatability: 0.15nm
Baseline Stability: 0.005A/30 min
Sensitivity (Cu): 0.03 Μg/ml/1%
Burner Head: Titanium alloy burner
Nebulizer: High-efficiency glass nebulizer
Atomization Chamber: Corrosion-resistant material
Position Adjustment: Automatic changeover of flame and furnace
Automatic setting of optimum height for flame burner
Safety: Automatic ignition and of mixing air-acetylene gas with safety control