Dispersive spectrometers , Single-beam dispersive spectrometers
المؤلف:
Sue Jickells , Adam Negrusz (Editors)
المصدر:
Clarkes Analytical Forensic Toxicology
الجزء والصفحة:
425
2026-11-12
24
Dispersive spectrometers
Single-beam dispersive spectrometers
With a single-beam instrument, the I0 spectrum is measured first with air (or appropriate solvent) as a reference in the light beam. In a separate measurement the It spectrum of the sample is recorded. Computers allow data to be stored and processed automatically. To ensure accuracy and precision, all components in the instrument (light source, detector and electronics) need to be very stable to ensure that I0 does not drift. Nowadays, single-beam dispersive IR spectro meters are likely to be found only in monitoring processes (e.g. environmental pollution).
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