No significant dependence was observed: for 5 compounds, the RT was the same for each of the compounds for an injected volume within the range 0.1 -1 µl. The deviation for successive measurements was not more than 0.01 min. In addition, there is almost no difference whether there was one or multiple different compounds in the solution. Errors of the RI measurement are less than 10 units for almost all compounds. Compounds with RI more than 3500 were not included due to a possible high error in the RI estimation: in this area, peaks of n-alkanes tend to be broad and located closely to each other. The use of RI systems other than those based on n-alkanes can be the scope of further research. The data set containing RT and RI can be downloaded from the Figshare repository .