Since its introduction in 1975, flow injection analysis [1]
(FIA) has been a powerful technique in analytical chemistry.
First considered as an appropriate tool to replace segmented
flow analysis [2] for automation of chemical analysis, the
FIA concept has allowed implementation of procedures that
used to be difficult or even not feasible by conventional approaches.
These features were provided by the strict control
of reaction conditions in both space and time, enabling assays
of constituents based on transient components or the use of
detection principles relying on transient effects such as chemi
and bioluminescence