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| Brand | SPECTRUMA |
|---|---|
| Origin | Germany |
| Model | GDA 750 / GDA 550 |
| Detection Principle | Glow Discharge Optical Emission Spectroscopy (GD-OES) |
| Spectral Range | 190–800 nm (standard PMT system) |
| Spectral Resolution | <20 pm FWHM (PMT) |
| Optical System | Paschen-Runge mount, 750 mm focal length, holographically ruled grating (2400 lines/mm) |
| Max. Analytical Depth | >200 µm |
| Depth Resolution | ≤1 nm |
| Elemental Coverage | H, O, N, Cl, C, and all elements from Li to U |
| Detection Limits | Sub-ppm (matrix-dependent) |
| Sputter Diameter | 1–8 mm (adjustable, same source) |
| DC Source | Up to 1500 V, 250 mA, fully programmable |
| RF Source | Up to 150 W, pulsed mode optional (GDA 750 only) |
| Sample Thickness Range | 50 µm – 45 mm |
| Vacuum System | Dual-stage rotary vane pump (<50 dB), oil-free pump for source chamber |
| Optional Accessories | High-resolution CCD optical system, RF pulse generator, load-lock transfer chamber, 100-position autosampler, monochromator with triple-grating turret |
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