Abstract:

In recent years, practical academic training has become an essential tool for university education since it is based on the application of the concepts previously acquired during theoretical sessions to solve problems of real situations. In this sense, practical lessons help the students to acquire new knowledges and to develop skills and competencies needed to play a professional role.

The technological breakthrough that has taken place in the last decade, as well as the increasing demand of students for the use of new interactive materials, have led to the development of different teaching strategies based on the application of multimedia resources in experimental sciences. Taking this aspect into account, multimedia videos constitute an important tool to improve the comprehension of theoretical concepts previously acquired in master classes and encourage the students applying them in realistic scenarios at the laboratory.

In this work, a complementary pedagogical approach has been developed based on the design of several interactive videos to introduce students of Chemistry Degree into the field of miniaturised extraction techniques following the current trends in Analytical Chemistry. These techniques represent an environmentally friendly alternative to conventional procedures due to their efficiency, simplicity and less time-consumption, as well as lower use of toxic solvents and sample amounts. For this purpose, different multimedia videos describing theoretical aspects and operational modes of some extraction procedures, including hollow-fiber liquid-phase microextraction, dispersive liquid-liquid microextraction and magnetic-dispersive solid-phase extraction have been performed. In addition, the proposed approach offers to the students the possibility of making reasonable decisions about selecting the most suitable extraction technique to determine specific groups of compounds in real samples of interest.

Keywords:

Videos, miniaturised extraction techniques, Analytical Chemistry.