Process and device for recognition of a medium fraction, in particular in motor fuel

摘要

The invention relates to a process and a device for recognition and in particular quantification of a medium fraction in a translucent solution, in particular in a motor fuel. According to the invention, a process is proposed for recognition of the concentration of a fluorescent substance, in particular a marker, in a fluid to be examined in which a sample has been introduced into an examination space, in connection with an exposure step the examination space is trans-illuminated by a beam of light such that in the examination space one fluid segment interspersed by a beam of light and one fluid segment not interspersed by a beam of light are formed.