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Analytical Chemistry: Techniques and Applications
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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: 20 August 2025 | Viewed by 4809

Special Issue Editors

Prof. Dr. Mario Ferreira Conceição Santos

E-Mail Website
Guest Editor
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

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Published Papers (4 papers)

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Research

15 pages, 1101 KiB  
Article
Analysis of Glucocorticoids as Potential Adulterants in Cosmetic Products: A Dual Approach for Qualitative and Quantitative Evaluation Based on ELISA and HPLC-MS Methods
by Seyedeh Rojin Shariati Pour, Afsaneh Emamiamin, Martina Zangheri, Donato Calabria, Massimo Guardigli, Emanuele Porru, Jessica Fiori and Mara Mirasoli
Appl. Sci. 2025, 15(1), 414; https://doi.org/10.3390/app15010414 - 4 Jan 2025
Viewed by 874
Abstract
The analysis of cosmetic products represents an important field of analytical chemistry, since the demand for new formulations is continuously increasing. Regulations about prohibited/regulated compounds are applied in each country. Among the substances that are banned in cosmetics, corticosteroids represent a potential harm [...] Read more.
The analysis of cosmetic products represents an important field of analytical chemistry, since the demand for new formulations is continuously increasing. Regulations about prohibited/regulated compounds are applied in each country. Among the substances that are banned in cosmetics, corticosteroids represent a potential harm for consumers since the prolonged exposure to these compounds can affect health status. However, corticosteroids can be found in cosmetics as an illegal addition since they are able to alleviate the symptoms of inflammatory skin problems. In this work, two different approaches for detecting corticosteroids as potential adulterants in cosmetic products were compared. First, a reversed-phase HPLC-MS method was optimized and fully validated in order to identify and quantify eight corticosteroids (methylprednisolone, beclomethasone, flunisolide, budesonide, betamethasone 17-valerate, beclomethasone dipropionate, flumethasone, and dexamethasone). This reference method was then compared with an enzyme-linked immunosorbent assay (ELISA). Indeed, immunological techniques allow for rapid, low-cost, and sensitive detection of target analytes even in complex matrices, and they can be performed with simple instrumentation and by non-skilled personnel. The application of these methods on spiked cosmetic products was compared in terms of performance and advantages in order to evaluate the possibility of exploiting a complementary approach for optimizing the time for and costs of the analysis. Full article
(This article belongs to the Special Issue Analytical Chemistry: Techniques and Applications)
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19 pages, 1385 KiB  
Article
Geological Influences on Wine Quality: Analyzing Nebbiolo Grapes from Northern Italy
by Laura Santagostini and Vittoria Guglielmi
Appl. Sci. 2025, 15(1), 258; https://doi.org/10.3390/app15010258 - 30 Dec 2024
Viewed by 491
Abstract
This study investigates the critical relationship between soil characteristics, trace element concentrations in Nebbiolo grapes, and the resulting wine quality, emphasizing the importance of terroir in winemaking. Italy, particularly the regions of Piedmont, Lombardy, and the Aosta Valley, is home to Nebbiolo, a [...] Read more.
This study investigates the critical relationship between soil characteristics, trace element concentrations in Nebbiolo grapes, and the resulting wine quality, emphasizing the importance of terroir in winemaking. Italy, particularly the regions of Piedmont, Lombardy, and the Aosta Valley, is home to Nebbiolo, a prestigious grape variety known for its depth and aging potential in wines like Barolo and Barbaresco. The research focuses on seventeen grape and wine samples, highlighting how soil mineral composition could affect grape composition and wine characteristics. The analysis employed ICP-AES (inductively coupled plasma atomic emission spectrometry) to measure trace elements such as Al, Ba, and Mn, linking their concentrations to the soil’s geological properties. Elements were categorized into three groups based on their origins—natural soil contributions (Al, Ba, Li, Mn, Mo, Sr, Ti), those influenced by production cycles (Ca, Mg, K, Cu, Zn, Fe), and artificial sources (Co, Cr, Ni, V)—asserting that the first group serves as the most reliable indicators for tracing wines back to their vineyard origins. By establishing a chemical fingerprint for Nebbiolo wines, this research aims to enhance their authenticity and market value while providing insights into the intricate interplay between soil, grape varietals, and winemaking practices and contemporary challenges like climate change and evolving market demands. Full article
(This article belongs to the Special Issue Analytical Chemistry: Techniques and Applications)
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11 pages, 780 KiB  
Article
Utilizing Cost-Effective Determination Techniques to Authenticate Cosmetics
by Shaoming Jin, Hongren Qu, Xiao Ning, Shenghui Cui and Jin Cao
Appl. Sci. 2024, 14(8), 3198; https://doi.org/10.3390/app14083198 - 10 Apr 2024
Viewed by 1493
Abstract
(1) Background: The adulteration of cosmetics has become increasingly common, which seriously harms ordinary consumers. The counterfeit cosmetics pointed out in this study mainly refer to imitating genuine products in terms of ingredients and packaging. Ordinary consumers cannot distinguish their authenticity solely based [...] Read more.
(1) Background: The adulteration of cosmetics has become increasingly common, which seriously harms ordinary consumers. The counterfeit cosmetics pointed out in this study mainly refer to imitating genuine products in terms of ingredients and packaging. Ordinary consumers cannot distinguish their authenticity solely based on appearance and daily use. If there is a convenient and low-cost detection method that can expose this phenomenon of adulteration, it will be able to expose adulteration and protect the interests of consumers quickly and conveniently. (2) Methods: MALDI-TOF, GC-MS, and mid-IR were used to develop low-cost and fast methods for identifying the authenticity of cosmetics. Five types of liquid and five types of emulsion cosmetics purchased from container and wholesale markets were analyzed using the three instruments mentioned above, and their spectra and acquired data were carefully compared to determine their authenticity. MALDI-TOF and GC-MS directly tested cosmetic samples, and mid-IR spectroscopy tested the ink on the outer packaging of cosmetics. (3) Results: The data procured by MALDI-TOF can provide a representation of its product attributes; two liquid samples and one paste sample demonstrated inconsistent test outcomes with the corresponding reference samples, suggesting contamination. The results of GC-MS can illustrate the substance count within cosmetic samples; the comparison outcomes of the total ion chromatogram indicate that one paste sample was a counterfeit. The results attained from mid-IR were consonant with those acquired from the MALDI-TOF analysis and GC-MS. (4) Conclusions: These three newly developed techniques can all be effectively utilized for the task of detecting cosmetic adulteration and quality control in the manufacturing process. With regard to user-friendliness and rapidity, both MALDI-TOF and mid-IR outperform GC-MS, demonstrating consistently superior levels of detection. Conversely, GC-MS has unique advantages in identifying emulsion cosmetics containing a high amount of weak polarity and volatile substances. Consequently, these corresponding methods could serve as efficient and cost-effective ways to detect authenticity issues in real-world cosmetic products. Full article
(This article belongs to the Special Issue Analytical Chemistry: Techniques and Applications)
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12 pages, 1900 KiB  
Article
Water-Based Microwave-Assisted Digestion Method for Electrochemical and Chromatographic Determination of Total Fluoride Ions in Toothpaste Samples
by Mbuyamba Divin Mukendi and Nomvano Mketo
Appl. Sci. 2023, 13(24), 13315; https://doi.org/10.3390/app132413315 - 17 Dec 2023
Viewed by 1457
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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