LIBS Info: Element Analysis
|Detector:||SciAps Z-500 LIBZ analyzer|
|From the Spectroscopy Online website:
The Z-500 utilizes a 5 mJ, 10 Hz, pulsed laser that operates at an eye-safe wavelength of 1532 nm. It possesses a proprietary spectrometer that spans a wavelength range of 185–680 nm, with 0.1 nm (FWHM) resolution. The laser is focused down to approximately a 50 µm spot to produce a bright plasma at the sample surface. The focusing lens and collection optics are mounted on a 3D stage under processor control. This allows the laser to be rastered around the sample, to collect spectra from multiple locations, which the analyzer averages to account for sample non-homogeneity, and for automated focal length adjustments. The spectrometer is gated to reject the large amount of background radiation emitted in the early stage of the plasma, largely due to Bremsstrahlung radiation. The region around the plasma is (optionally) argon-purged with an on-board argon canister stored in the analyzer handle. The argon purge, combined with spectrometer gating improves the limits of detection by a factor of 5×–20× (element dependent) due to both increased signal from the inert gas environment, and greatly reduced background from the spectrometer gating.
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