inside a container, e.g. in an ampoule (G01N21/53 takes precedence)

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 > Scattering, i.e. diffuse reflection > within a body or fluid > inside a container, e.g. in an ampoule

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Systems in which incident light is modified in accordance with the properties of the material investigated (where the material investigated is optically excited causing a change in wavelength of the incident light G01N21/63) > Scattering, i.e. diffuse reflection (G01N21/25, G01N21/41 take precedence ) > within a body or fluid > inside a container, e.g. in an ampoule (G01N21/53 takes precedence)