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Instrument Database:
Applied Research Laboratories (ARL) - Model 3520 ICP-OES
( Thermo Scientific )
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| Year of introduction |
1984 |
| Status |
historical ( out of service ) |
| Company |
Applied Research Laboratories (ARL)
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| Categories |
Spectrometer ( Atom. ): AES: ICP-AES
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The versatile 3520 features the flexibility of sequential analysis while providing the stability of a simultaneous instrument -with typical analytical speeds of up to 10 elements per minute, Time consuming peakseek routines are eliminated through a unique fixed diffraction grating system, resulting in superior speed and accuracy, Perfect in the general purpose laboratory the 3520 OES for today and tomorrow. The 3520 ICP uses a fixed grating and strips of steel tape with exit slits at every 2 mm on the focal curve. Fine adjustment of the analytical wavelengths is done by a free-of-loose displacement of the entrance slit with the aid of a high-precision stepping motor. The sequential measurements of the free-selectable analytical wavelengths are accomplished by one of the two photomultipliers which can be moved at high speed along the focal curve. The selection of the exit slit, the displacement of the entrance slit, the selection and positioning of the photomultiplier and the presetting of the electrical parameters are controlled by a computer and can be done for any line within 1.5 s.
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| Specifications |
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Dimensions (w x d x h in cm)
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| Weight (kg)
| | Power
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| Spectrometer
| 1-m Paschen-Runge mount, vacuum and air version; thermostatization allows 18-30°C ambient temperature.
| | Grating | concave grating, 1080 lines/mm;
| Optics
| entrance slit width: 20 µm; exit slit width: 50 µm; 7
filters for order separation and stray light reduction
| | Wavelength range | | Wavelength drive
| fixed optical mounting; exit slits are equally spaced (every 2 mm) on steel masks in focal plane; 2 moveable photomultipliers (10 stage-l U.V. and 1 for visible range) and moveable entrance slit allow random
wavelength access.
| | Resolution | 46 pm in 1st order
| | Detector | | Detection mode
| | | Read out | | | | | ICP generator
| automatic ignition and tuning;
| | Frequency (MHz) | 27.12
| Power (Watt)
| 2000
| Load coil
| water cooled
| Torch
| | Argon flow (L/min)
| 12
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| | | Sample introduction | | Operating system and software
| | Computer
| Microprocessor-controlled choice and positioning of
photomultiplier;-entrance slit positioning-filter choice;-
wavelength calibration with mercury lamp;-attenuator stage selection for PMT-voltage. lo6 linear dynamic range; Dataprocessing with DEC-LST 11, based microcomputer; different terminals and interfaces.
| Short term precision (RSD for 10 replicates)
| | Long term precision (RSD for 4 hours)
| | Sensitivity
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| | Detection limits (3s, µg/L) |
| Accessories
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| Special features
| Spark excitation (optional) |
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