Dynamic Range in Full-Spectrum Analysis

Did you know that the OMA-300 is able to measure multiple concentration ranges without adjustments to the system’s optics, flow cell, or detector? This feature is possible due to the system utilizing dispersive spectroscopy techniques. Unlike photometers, which measure one point in the spectrum, dispersive systems measure the entire UV absorption spectrum of a chemical species.

The use of the entire spectrum solves the signal clipping problem that can often hamper photometers. Signal clipping occurs when the absorbance of the chemical species exceeds the detection limit of the photometer. When this situation happens with dispersive spectrometers, the analyzer can measure a different region of the spectra that would otherwise be unusable at lower concentrations due to poor signal-to-noise ratio. No adjustment of the optics is required for this to occur.

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