Abstract:

In recent years, significant efforts have been devoted to developing simple and effective analytical methodologies aligned with the principles of Green Analytical Chemistry. These approaches aim to minimize reagent consumption, reduce waste generation, and simplify analytical workflows while maintaining high analytical performance. However, the dissemination and teaching of such innovative methodologies remain a challenge, especially when practical laboratory demonstrations are limited by time, resources, or accessibility.

In this context, the present educational project focuses on developing two videos designed to introduce the scientific and academic community to sustainable strategies for sample preparation in elemental analysis. The first video covers the use of liquid-phase microextraction for the preconcentration of inorganic species in liquid samples. The second video illustrates the preparation of suspensions as an alternative strategy for the direct analysis of solid samples. Both approaches represent simple, efficient, and environmentally friendly alternatives to traditional sample treatment procedures such as liquid–liquid extraction or acid digestion, which are generally more complex, time-consuming, and less sustainable. For both analytical strategies, Total Reflection X-ray Fluorescence (TXRF) is employed as the detection technique. TXRF offers several advantages compared with other spectroscopic techniques commonly used in elemental analysis, such as inductively coupled plasma mass spectrometry. These advantages include reduced consumption of reagents and consumables, simplified sample preparation, and lower energy requirements, making TXRF particularly attractive within the framework of green analytical methodologies.

Through visual explanations and step-by-step demonstrations, the videos seek to facilitate the understanding of the target analytical methodologies. This project is part of a broader initiative promoted by the Sample Preparation Study Group and Network of the Analytical Chemistry Division of the European Chemical Society, which aims to develop innovative educational resources focused on sample preparation training. The materials generated within this initiative are intended for researchers, educators, and students worldwide and will be made freely accessible in order to disseminate knowledge and enhance practical skills related to sample preparation across the scientific community (https://www.sampleprep.tuc.gr/en/activities/educational-material, https://go.uv.es/I0Onmjj). In addition, the proposed videos are expected to serve as valuable teaching resources for various academic levels, from high school to higher education.

Keywords:

Educational videos, GAC, laboratory demonstrations, teaching resources.