4. Applications
Optical emission spectrometry (OES) in the visible and ultraviolet ranges has a very broad field of application, both in terms of the elements that can be analyzed and the variety of metallic matrices involved. Elements analyzable by OES represent 80% of the periodic table. Halogens with excitation and ionization energies above 15 eV are not measured. Other elements, such as arsenic and tellurium, have very moderate detection limits (50 to 100 ppm). Analysis of N 2 and O 2 gases requires extensive vacuums and high-performance optics. At 149.2 nm, atomic nitrogen is dosable above 20 ppm on some instruments. Oxygen becomes accessible at 130.3 nm at higher levels (from 20 to 30 ppm).
The high sensitivity of spark-source SEO limits the range of measurable concentrations for...
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Applications
Conclusion
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Cost of equipment
Depending on the laboratory's analytical needs, the cost of purchasing a spectrometer can vary considerably, as the purchase price depends on the number of analytical lines. It is therefore preferable to set a price range for a spectrometer equipped with 20 fixed channels and a single spark excitation source. So-called low-end equipment with a limited number of 20 or so elements ranges from 45 to 75 kE, while the upper...
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