IPC Subgroup
G01N 21/31 Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
Introduced: January 1980
Last revised: January 2006
Full Title
Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Systems in which incident light is modified in accordance with the properties of the material investigated > Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands > Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
3 direct subcodes
Child Classifications
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- G01N 21/33 using ultraviolet light
- G01N 21/35 using infrared light
- G01N 21/39 using tunable lasers