Analytical Chemistry: Techniques and Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 808

Special Issue Editors

Department of Chemistry and Physics, Federal University of Espírito Santo, Vitoria-Gasteiz, Brazil
Interests: HPLC; LC/MS; NMR; natural product; bioactive compounds; bioassays; analytical method validation; phytochemistry; chemical ecology; CG/MS; metabolomics; toxicity; phytotherapic; organic chemistry
Prof. Dr. Sergio Ambrosio
E-Mail Website
Guest Editor
Nucleus of Research in Sciences and Technology, University of Franca, Franca 14404-600, SP, Brazil
Interests: isolation; structural clarification; analytical studies; biological tests and biotransformation of bioactive plant secondary metabolites

Special Issue Information

Dear Colleagues,

This Special Issue aims to disseminate articles for the rapid publication of original research papers, articles, and reviews on research developments in all areas of analytical chemistry, such as electroanalytical, spectroscopic analysis, and mass spectrometry. Articles considered for publication should focus on instrumentation development, improvements and applications, new sensors and applications in analyzing and quantifying active principles from different matrices, as well as the validation and development of analytical methods and methodologies. Thus, articles on analytical chemistry applied to similar areas of science, such as organic chemistry, geosciences, biological sciences, nanotechnology, engineering, and environmental sciences, will be considered.

Prof. Dr. Mario Ferreira Conceição Santos
Prof. Dr. Sergio Ambrosio
Guest Editors

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. Applied Sciences 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 2400 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

  • analytical chemistry
  • method development
  • instrumentation
  • validation
  • organic matrices

Published Papers (1 paper)

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Research

12 pages, 1900 KiB  
Article
Water-Based Microwave-Assisted Digestion Method for Electrochemical and Chromatographic Determination of Total Fluoride Ions in Toothpaste Samples
Appl. Sci. 2023, 13(24), 13315; https://doi.org/10.3390/app132413315 - 17 Dec 2023
Viewed by 662
Abstract
Fluoride ions are the major constituents of dental products because they prevent cavities through bacterial growth inhibition. However, excessive consumption of fluoride ions results in fluorosis, thereby causing tooth staining and roughness. Therefore, there is a crucial need to develop rapid and effective [...] Read more.
Fluoride ions are the major constituents of dental products because they prevent cavities through bacterial growth inhibition. However, excessive consumption of fluoride ions results in fluorosis, thereby causing tooth staining and roughness. Therefore, there is a crucial need to develop rapid and effective methods for monitoring fluoride levels in dental products. The current study describes a greener water-based microwave-assisted digestion (WB-MAD) prior to fluoride-ion-selective electrode (F-ISE) measurement for the determination of fluoride ions in various toothpaste products. The optimum conditions of the developed WB-MAD method were 180 °C digestion temperature, 60 min digestion time, 0.05 g toothpaste amount and 10 mL distilled water. Under the optimum conditions, the method detection limit (MDL) of 0.00302 µg/kg and the method quantification limit (MQL) of 0.01007 µg/kg obtained were favorably comparable with the literature reports. The proposed WB-MAD method was both accurate (99.2 to 101%) and precise (≤0.75%) for the quantitative determination of F in toothpaste samples using F-ISE. Furthermore, the newly developed WB-MAD method showed better accuracy (97–100%) than the traditional microwave-assisted acid digestion methods (71–92%). It is worth indicating that since water was used as the only digestion reagent, it was possible to validate the F-ISE results with ion chromatography (IC). The percentage recoveries obtained from IC (91–104%) and F-ISE (93–100%) were statistically insignificant. In view of the validation data, the proposed WB-MAD method can be considered as an alternative to the conventional microwave-assisted acid digestion (MAAD) methods for the determination of F in toothpaste samples containing sodium monofluorophosphate. Full article
(This article belongs to the Special Issue Analytical Chemistry: Techniques and Applications)
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