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Instrument Database:
VG Isotopes - PlasmaQuad (PQ I)
( Thermo Scientific )
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| Year of introduction |
1984 |
| Status |
historical ( out of service ) |
| Company |
VG Isotopes
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| Categories |
Mass spectrometer: ICP-MS
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First generation quadrupole ICP-MS instrument. The PQ1 was developed in 1984 by VG Elemental and was the first commercially available ICPMS. Standing approximately 6ft high and 9ft wide it has quite a room filling presence. The plasma RF was generated from a 2KW Henry generator and the vacuum system was made up of Blazer diffusion pumps and Edward's rotary pumps. The torchbox moved on a pneumatic piston driven carriage and it had the 12-12 quadrupole system. Sensitivity was in the range of 1 to 4 mcps/ppm and the instrument was controlled by DOS software.
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| Specifications |
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Dimensions (w x d x h in cm)
| 216 x 65 x 160 (spectrometer)
60 x 65 x 112 (RF generator)
| Weight (kg)
| 550
| Power
| 3 phase, 20 A each, 415 V, 10 kVA | Mass filter
| quadrupole
| Mass range
| 0-300 amu | | Resolution | 1M and 3M over the mass range | Detector
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| Dynamic range (orders of magnitude)
| 6 | | Vacuum system | 3 stage differentially pumped system; diffusion pumps on expansion and analyser stage | ICP generator
| Frequency-stabilized | | Frequency (MHz) | 27.12 | Power (Watt)
| 1500 (2000/2500 optional) | | Load coil |
| Torch
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| Argon flow (L/min)
| 13 | Sample introduction
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| Operating system and software
| DOS
| Computer
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| Short term precision (RSD for 10 replicates)
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| Long term precision (RSD for 4 hours)
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| | Sensitivity (Mcps/ppm) | 1 to 4 | Detection limits (3s, ng/L)
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| Isotope ratio precision (RSD for Ag-107/Ag-109)
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| Doubly charged Ba ions
| < 2% | | Ce Oxide ions | < 0.5% | | Accessories | laser ablation; 200 position autosampler | | Special features |
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Related links:
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