Fig. 2 shows the molecular-weight-dis- tribution of the hydrocarbons. It is shown that the highest intensities for F are obtained at 10 DBE and 12 DBE, whereas the most intense peaks in P are at 18 DBE and 20 DBE. In gen- eral, ions with up to 50 DBE could be detected in both samples. The low fragmentation is caused by the stability of polycyclic aromatic hydrocarbons due to their delocalized π-elec- trons and the resulting stabilization of the charge. In contrast, alkyl side chains tend to fragment. The resulting fragment ions always have 0.5 DBE due to the absence of rings or double bonds and the typical elimination of one hydrogen. The low intensity of these ions to- gether with the strong orientation of the re- maining ions along a diagonal in the isoabun- dance plots suggests a very low degree of al- kylation for both samples (Fig. 2). For the investigation of different het- eroatomic species, all detected ions were as- signed to a substance class based on their exact masses. The elemental composition of the sam- ples can then be calculated based on these re- sults. Fig. 3. Comparison of elemental compositions of both CTP-binders. The light grey bars repre- sent the results of elemental analyses, whereas the dark grey bars represent calculated ele- mental composition using DIP-HRMS data. Er- ror bars represent the standard deviation through triple determination. A comparison with the elemental anal- yses is shown in Fig. 3. The results of these two analyses agree very well. In both cases, carbon and hydrogen represent the largest mass frac- tion. In addition, the amount of oxygen and ni- trogen is greater in P than in F, while the amount of sulphur is slightly lower. The vari- ance in the absolute values can be explained by the limitations of the DIP analysis. While in el- emental analysis the entire sample is examined, in mass spectrometry the transfer of the com- ponents into the gas phase is a necessary crite- rion. Therefore, very high molecular weight compounds are underrepresented in this method. Nevertheless, DIP analysis offers a re- liable possibility for the investigation of the semi-volatile fraction. The amount of different compound classes is even more interesting than the ele- mental composition of the samples (Fig. 4). In both samples the compound classes N, S, O, NO and NS are the most abundant ones along with the class of hydrocarbons. It can be ob- served that all heteroatomic compound classes, except for S and SO, have a higher relative abundance in P than in F. Fig. 4. Normalized abundances of all assigned compound classes with a minimum of one het- eroatom detected by DIP-HRMS measure- ments. The two samples can already be distin- guished from each other by their different rela- tive abundances of substance classes. However, more significant differences are revealed by