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Molecules
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Past, Present, and Future of Green Analytical Chemistry
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Past, Present, and Future of Green Analytical Chemistry

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Analytical Chemistry".

Deadline for manuscript submissions: closed (30 July 2022) | Viewed by 1937

Special Issue Editor

Prof. Dr. Victor David

E-Mail Website
Guest Editor
Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, Bucharest, Romania
Interests: separation science (theory and applications in various scientific domains)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Humankind, particularly all natural sciences branches, is more than ever aware and concerned regarding the environment and health, with the scientific debate of this problem present in many literature publications focused on this topic. Therefore, the question arises whether the analytical laboratories are part of this adverse effect on the environment, or if analytical chemistry can even partially solve the negative impact of chemicals and reagents typically recommended for solving a certain analytical problem. The frequent use of organic solvents, for example, in different analytical procedures such as a part of the analysis known as sample preparation, introduces the discussion regarding their wasted amount and impact on the environment. A desired solution by analysts is to replace solvents having a toxic interaction with others, having a greener effect on the environment, or the development of analytical technologies that avoid common solvents, such as, for instance, the implementation of superheated water chromatography, which is considered to be a green technology compared to the others in use. Another option is to find strategies for a reduction in the consumption or  dissipation in the environment of irreplaceable solvents and reagents in laboratories by means of optimization procedures and eliminating unnecessary experiments. Other than more or less harmful solvents, there are many other substances manipulated in analytical laboratories or being used as reagents and additives in different experimental procedures that could potentially increase the risk of adverse effects on the environment, with some implementation possibilities of “green chemistry” rules to analytical laboratories already having been reported by the literature, although this trend keeps accelerating and more interest is being dedicated to this sensible field of research. Additionally, in recent decades, the literature has recommended different green metric approaches that could be used to evaluate the environmental effects of analytical procedures. Therefore, it is the aim of this Special Issue of Molecules to provide some contributions to this topic, by discussing the actual problems and possible solutions in research papers or reviews by chemists and their collaborators involved in environmental aspects and related domains.

Prof. Dr. Victor David
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • green analytical chemistry
  • environment/ecology
  • green solvents
  • solvent optimization
  • green scale
  • green metrics
  • green characterization
  • solvent waste
  • instrumental miniaturization
  • solventless analytical techniques
  • solvent removal
  • solvent consumption
  • health effects
  • toxicology
  • ecological characteristics

Published Papers (1 paper)

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Research

13 pages, 2332 KiB  
Article
Use of a Hydrophobic Azo Dye for the Centrifuge-Less Cloud Point Extraction–Spectrophotometric Determination of Cobalt
by Kiril Blazhev Gavazov, Petya V. Racheva, Nikolina P. Milcheva, Vidka V. Divarova, Denitsa Dimitrova Kiradzhiyska, Fatma Genç and Antoaneta D. Saravanska
Molecules 2022, 27(15), 4725; https://doi.org/10.3390/molecules27154725 - 24 Jul 2022
Cited by 8 | Viewed by 1474
Abstract
The hydrophobic azo dye 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H2L) was studied as part of a system for the centrifuge-less cloud point extraction (CL-CPE) and spectrophotometric determination of traces of cobalt. The extracted 1:2 (Co:HTAR) complex, [CoIII(HL−)(L2−)]0 [...] Read more.
The hydrophobic azo dye 6-hexyl-4-(2-thiazolylazo)resorcinol (HTAR, H2L) was studied as part of a system for the centrifuge-less cloud point extraction (CL-CPE) and spectrophotometric determination of traces of cobalt. The extracted 1:2 (Co:HTAR) complex, [CoIII(HL−)(L2−)]0, shows an absorption maximum at 553 nm and contains HTAR in two different acid–base forms. Optimum conditions for its formation and CL-CPE were found as follows: 1 × 10−5 mol L−1 of HTAR, 1.64% of Triton X-114, pH of 7.8, incubation time of 20 min at ca. 50 °C, and cooling time of 30 min at ca. −20 °C. The linear range, limit of detection, and apparent molar absorptivity coefficient were 5.4–189 ng mL−1, 1.64 ng mL−1, and 2.63 × 105 L mol−1 cm−1, respectively. The developed procedure does not use any organic solvents and can be described as simple, cheap, sensitive, convenient, and environmentally friendly. It was successfully applied to the analysis of artificial mixtures and real samples, such as steel, dental alloy, rainwater, ampoules of vitamin B12, and saline solution for intravenous infusion. Full article
(This article belongs to the Special Issue Past, Present, and Future of Green Analytical Chemistry)
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