Method of spectroscopic analysis of residue in bottom of used containers or bottles

摘要

The method involves irradiating the base of the bottle with several rays (12-14), which pass through the base region at different angles. The angles of the rays are such that at least one recess (22-25) is penetrated by a beam, independently of the azimuthal position of the bottle. The composition of the residue substance can then be determined by a spectrometer (35). An Independent claim is included for a device for carrying out the method.