Spectroscopy

Spectroscopy

Contributors in Spectroscopy

Spectroscopy

A spectral manipulation technique where the absorbances of a reference spectrum are subtracted from the absorbances of a sample spectrum. The idea is to remove the bands due to the reference material ...

wavelength

Chemistry; Spectroscopy

Distance between adjacent crests or troughs of a light wave.

transmission sampling

Chemistry; Spectroscopy

A sampling method where the infrared beam passes through the sample before it is detected. Samples are typically diluted or flattened to adjust the absorbance values to a measurable range.

smoothing

Chemistry; Spectroscopy

A spectral manipulation technique used to reduce the amount of noise in a spectrum. It works by calculating the average absorbance (or transmittance) of a group of data points called the “smoothing ...

single beam spectrum

Chemistry; Spectroscopy

The spectrum that is obtained after Fourier transforming an interferogram. Single beam spectra contain features due to the instrument, the environment, and the sample.

sidelobes

Chemistry; Spectroscopy

Spectral features that appear to the sides of an absorbance band as undulations in the baseline. Sidelobes are caused by having to truncate an interferogram, as a result of finite scan distance, and ...

resolution

Chemistry; Spectroscopy

A measure of how well an IR spectrometer can distinguish spectral features that are close together. For instance, if two features are 4 cm-1 apart and can be discerned easily, the spectrum is said to ...