8 Terms
Contributors in Spectroscopy
Spectroscopy
spectral subtraction
Chemistry; 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 ...
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 ...
