The post reaction polymeric tubing was analyzed by confocal Raman microscopy for chemical changes due to the exposition to catalyst material under the harsh conditions of the chemical reaction. The regions of interest were selected to include some visible features that are observed after the catalytic reaction i.e., deposits, fiber fragments and embossings (Figure and). The Raman image is created as a twodimensional information leading to pixels of ca. 2 µm edge length, with specific information about the composition. It is important to note that the Raman images were mapped in three planes (top, vertical and horizontal) respectively for all samples and regions analyzed.