Recently, the development of analytical methods for the determination and/or preconcentration of pollutants species, such as metal and organometallics species from environmental, biological, and food matrices using different sample preparation procedures, has attracted great attention in analytical chemistry and still is a major challenge for researchers. Furthermore, some metals such as arsenic, chromium, selenium, and antimony, present different toxicity, bioavailability, mobility, and other critical properties depending on their species present in the sample medium rather than their total concentrations. Thus, to understand the behavior of some metals in a given system, it is important to identify and quantify this species that make up its total concentration. In this sense, the elemental speciation is currently a very important form to enlarge the perspective for environmental, biological, food, and medicinal applications.

Thinking about that, the present special issue aims to encourage/publish original research articles and review articles devoted to analytical methods based on the green chemistry concept due to its relative simplicity, environmentally safe, selectivity, and sensitivity approach allowing being used in different spectrometric and electroanalytical techniques.

Potential topics include but are not limited to the following:

• Synthesis and characterization of new adsorbents designated as Advanced Functional Materials for alternative methods of extraction/preconcentration
• Novel extraction/preconcentration methods for metals analysis and speciation using spectrometric and electroanalytical techniques
• Development of sensitive and selective sensors being of low cost for metals and organometallic species determination
• Methods of samples preparation efficiency (low cost and time analysis) for environmental samples and biological and food samples