A free and Open Source software, Chemotion ELN was used as a reference ELN. The chosen ELN was developed for chemists and therefore offers the extensive functionality for research in the subject, of which we found the following feature particularly of our interest: the ability to plan chemical experiments, then performing related calculations and finally recording of information that deals with the amounts of chemicals used in chemical reactions. A specific function of the Chemotion ELN that is promising for transparent and reproducible work is the option to store two values for the amount of a chemical that is used in a reaction. The first value refers to a ´planned amount´ while the second one to the ´real amount´ reflecting the reality of chemistry where the amount that is planned for a reaction can sometimes not be weighed as precisely as necessary.