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

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FTIR-ATR

Seen on identity assessments.

Definition

Fourier-transform infrared spectroscopy with attenuated total reflectance. Infrared light passed through a crystal in contact with the sample is absorbed at frequencies characteristic of the bonds present, giving a pattern that can be matched against a reference spectrum with essentially no sample preparation.

Related terms

Reference spectrum
A spectrum recorded from material of known identity, which a sample spectrum is compared against.
Raman spectroscopy
Measurement of the small frequency shifts in light scattered by a sample, which report on the same molecular vibrations infrared absorption does but under different selection rules.

About identity confirmation

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

Diode-array detectionCapillary electrophoresisUV-Vis spectroscopyConfirmatory testing

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