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Instrument Database:
Instrumentation Laboratory - IL PLASMA-100 Sequential ICP Spectrometer
( Thermo Scientific )
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| Year of introduction |
1980 |
| Status |
historical ( out of service ) |
| Company |
Instrumentation Laboratory
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| Categories |
Spectrometer ( Atom. ): AES: ICP-AES
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The instrument, shown in its entirety, is a relatively compact sequential spectrometer, capable of determining eight elements per minute after equilibration of the plasma, which typically takes about twenty seconds per sample. The plasma is located in the upper center of the instrument, just above the nebulizer, which is feed by a computer-controlled peristaltic pump. The power supply for the plasma is in the lower part of the instrument, near the operator's knees. The plasma gas supplies are under a cover at the left side of the instrument, while the optics are located in the upper right portion. The instrument is controlled by one of a pair of keyboards, located at the right side of the instrument under the operator's right hand. An ASCII keyboard is on one side of a dual-sided system; the keyboard that is seen in the picture is a simplified unit which is intended for use by routine operators. Programs are stored on cassettes. Communication with the instrument takes place on a video display, which not only guides the operator through the use of the system, but also provides graphics to simplify methods development.
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| Specifications |
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Dimensions (w x d x h in cm)
| | Weight (kg)
| | Power
| | Spectrometer
| Ebert-Fastie double monochromator for reduced stray-light, 330 mm primary monochromator and a 165 mm secondary monochromator, air path (2nd channel vacuum optional); mercury lamp for wavelength calibration;
| | Grating | holographic, 1200 lines/mm, blazed at 500 nm, used in first order above 365 nm, second order below 365 nm
| Optics
| fused silica lens and quartz coated mirror within entrance optic is tilted under computer control to adjust observation zone for each element (observation height: 0-48 mm)
| | Wavelength range | 185 - 900 nm
| Wavelength drive
| stepper motor driven grating drive, step width 5 pm; refractory plate driven in steps of 1 pm
| | Resolution | | | Detector | | Detection mode
| | | Read out | |
| | ICP generator
| crystal-controlled, computer controlled ignition
| | Frequency (MHz) | 27.12
| Power (Watt)
| 2000
| Load coil
| | Torch
| demountable torch, sapphire injector optional,
| Argon flow (L/min)
| 15-20
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| | | Sample introduction | cross-flow nebulizer with sapphire orifices, computer-controlled peristaltic pump, polypropylen spraychamber,
| Operating system and software
| Software written in FORTH
| Computer
| Integrated Intel 8080A microprocessor; miniature magnetic cassettes for data storage, line printer, build-in video monitor
| Short term precision (RSD for 10 replicates)
| | Long term precision (RSD for 4 hours)
| | Sensitivity
| | | Detection limits (3s, µg/L) | | Accessories
| 95-place autosampler, PHD Hydride Generator, PDS-1 Data station (Tandy TRS-80)
| Special features
| Up to 8 elements can be determined per minute |
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