Abstract: A survey of the principles of sequential (SIA)- and flow injection analysis (FIA) systems with FTIR spectroscopic detection is presented to introduce these hyphenations as powerful techniques for performing chemical anal. in aqueous solution The strength of FIA/SIA-FTIR systems lies in the possibility to perform highly reproducible and automated sample manipulations such as sample clean-up and/or chemical reactions prior to spectrum acquisition. It is shown that the hyphenation of FIA/SIA systems with an FTIR spectrometer enhances the problem solving capabilities of the FTIR spectrometer as also parameters which can not be measured directly (e.g. enzyme activities) can be determined On the other hand application of FTIR spectroscopic detection in FIA or SIA is also of advantage as it allows to shorten conventional anal. procedures (e.g. sucrose or phosphate anal.) or to establish and apply a multivariate calibration model for simultaneous determinations (e.g. glucose, fructose and sucrose anal.). In addition to these examples two recent instrumental developments in miniaturized FIA/SIA-FTIR systems, a µ-Flow through cell based on IR fiber optics and a micromachined SI-enzyme reactor are presented in this paper.