Independent analytical testing. Results apply only to the sample received, for research use only.

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UV-Vis spectroscopy

Seen on identity assessments.

Definition

Measurement of absorbance across ultraviolet and visible wavelengths, giving the shape of a compound’s absorbance rather than a single reading at one wavelength. It is most informative where the analyte has a distinct chromophore, and least where it does not.

Related terms

Chromophore
The part of a molecule that absorbs ultraviolet or visible light.
Reference spectrum
A spectrum recorded from material of known identity, which a sample spectrum is compared against.

About identity confirmation

The spectroscopic techniques an identity conclusion is built from, and what each of them can settle.

Diode-array detectionFTIR-ATRRaman spectroscopyCapillary electrophoresisConfirmatory testing

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