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Advances in Green Analytical Chemistry
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Advances in Green Analytical Chemistry

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

Deadline for manuscript submissions: 30 June 2025 | Viewed by 5676

Special Issue Editor

Prof. Dr. Yu Yang

E-Mail Website
Guest Editor
Department of Chemistry, East Carolina University, Greenville, NC 27858, USA
Interests: pharmaceutical analysis; green chemistry; analytical chemistry; environmental chemistry; subcritical water oxidation; subcritical water extraction and chromatography; supercritical fluid extraction and chromatography; gas chromatography and liquid chromatography; separation and analysis of species from environmental and herbal matrices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Green analytical chemistry is an emerging field where hazardous organic solvents are either eliminated or minimized in analytical chemistry assays. Therefore, alternative green analytical methods are not only environmentally friendly, but also reduce the costs in regard to both solvent purchasing and waste disposal.

The aim of this Special Issue “Advances in Green Analytical Chemistry” is to focus on the application of sub- and supercritical fluids in a wide range of chemical processes as well as other green analytical technologies such as solid-phase microextraction (SPME). The goal of this type of green chemistry is to eliminate or minimize the use of toxic organic solvents in synthesis, cleaning, extraction, chromatography, environmental remediation, and other chemical processes.

Prof. Dr. Yu Yang
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

  • subcritical water
  • supercritical fluid
  • extraction
  • chromatography
  • organic solvent free
  • ethanol as eluent

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Published Papers (4 papers)

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Research

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10 pages, 2902 KiB  
Article
On-Site Sensitive Colorimetry for Free Cyanide by Using Ion-Pair Solid-Phase Extraction with Sedimentable Dispersed Particulates and Mobile Photography Box
by Nozomi Kohama, Takuya Okazaki, Kazuto Sazawa, Noriko Hata, Hideki Kuramitz and Shigeru Taguchi
Molecules 2024, 29(22), 5371; https://doi.org/10.3390/molecules29225371 - 14 Nov 2024
Viewed by 322
Abstract
We propose a sensitive and simple colorimetric method using dispersed particle extraction for the highly sensitive detection of free cyanide in water samples. The method involves the direct capture of the color-producing compound by dispersed microparticles in a sample vessel containing colorimetric reagents [...] Read more.
We propose a sensitive and simple colorimetric method using dispersed particle extraction for the highly sensitive detection of free cyanide in water samples. The method involves the direct capture of the color-producing compound by dispersed microparticles in a sample vessel containing colorimetric reagents and an adsorbent. The color of the microparticles that have naturally settled to the bottom of the microtube can be directly measured by visual observation or image analysis. A mobile photography box (MPB) suitable for use with a smartphone was developed to ensure reproducibility in the lighting environment during image acquisition. The MPB was then used to develop a highly sensitive analytical method for cyanide. This newly developed method allows direct measurement of the color tone of the target component collected on particles by irradiating light from below and photographing it perpendicularly. The method offers excellent portability, sensitivity, and reproducibility and is less affected by interfering color components. When applied to cyanide analysis, the detection limit reached 0.005 mg/L and measurements could be completed within 10 min, significantly shorter than the conventional absorbance spectrophotometric method, which requires 30 min. Thus, this method achieves highly sensitive cyanide analysis. Full article
(This article belongs to the Special Issue Advances in Green Analytical Chemistry)
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12 pages, 2915 KiB  
Article
A Highly Sensitive and Group-Specific Enzyme-Linked Immunosorbent Assay (ELISA) for the Detection of AFB1 in Agriculture and Aquiculture Products
by Junlin Cao, Ting Wang, Kang Wu, Fengjie Zhou, Yuze Feng, Jianguo Li and Anping Deng
Molecules 2024, 29(10), 2280; https://doi.org/10.3390/molecules29102280 - 12 May 2024
Cited by 2 | Viewed by 1184
Abstract
Aflatoxins (AFs) including AFB1, AFB2, AFG1 and AFG2 are widely found in agriculture products, and AFB1 is considered one of the most toxic and harmful mycotoxins. Herein, a highly sensitive (at the pg mL−1 level) [...] Read more.
Aflatoxins (AFs) including AFB1, AFB2, AFG1 and AFG2 are widely found in agriculture products, and AFB1 is considered one of the most toxic and harmful mycotoxins. Herein, a highly sensitive (at the pg mL−1 level) and group-specific enzyme-linked immunosorbent assay (ELISA) for the detection of AFB1 in agricultural and aquiculture products was developed. The AFB1 derivative containing a carboxylic group was synthesized and covalently linked to bovine serum albumin (BSA). The AFB1-BSA conjugate was used as an immunogen to immunize mice. A high-quality monoclonal antibody (mAb) against AFB1 was produced by hybridoma technology, and the mAb-based ELISA for AFB1 was established. IC50 and limit of detection (LOD) of the ELISA for AFB1 were 90 pg mL−1 and 18 pg mL−1, respectively. The cross-reactivities (CRs) of the assay with AFB2, AFG1, and AFG2 were 23.6%, 42.5%, and 1.9%, respectively, revealing some degree of group specificity. Corn flour, wheat flour, and crab roe samples spiked with different contents of AFB1 were subjected to ELISA procedures. The recoveries and relative standard deviation (RSD) of the ELISA for AFB1 in spiked samples were 78.3–116.6% and 1.49–13.21% (n = 3), respectively. Wheat flour samples spiked with the mixed AF (AFB1, AFB2, AFG1, AFG2) standard solution were measured by ELISA and LC-MS/MS simultaneously. It was demonstrated that the proposed ELISA can be used as a screening method for evaluation of AFs (AFB1, AFB2, AFG1, AFG2) in wheat flour samples. Full article
(This article belongs to the Special Issue Advances in Green Analytical Chemistry)
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7 pages, 1782 KiB  
Communication
Rapid and Visual Detection of Volatile Amines Based on Their Gas–Solid Reaction with Tetrachloro-p-Benzoquinone
by Yue-Xiang Sun, Zi-Jian Yan, Wan-Xia Liu, Xiao-Ming Chen, Man-Hua Ding, Lin-Li Tang and Fei Zeng
Molecules 2024, 29(8), 1818; https://doi.org/10.3390/molecules29081818 - 17 Apr 2024
Viewed by 1164
Abstract
The detection of volatile amines is necessary due to the serious toxicity hazards they pose to human skin, respiratory systems, and nervous systems. However, traditional amines detection methods require bulky equipment, high costs, and complex measurements. Herein, we report a new simple, rapid, [...] Read more.
The detection of volatile amines is necessary due to the serious toxicity hazards they pose to human skin, respiratory systems, and nervous systems. However, traditional amines detection methods require bulky equipment, high costs, and complex measurements. Herein, we report a new simple, rapid, convenient, and visual method for the detection of volatile amines based on the gas–solid reactions of tetrachloro-p-benzoquinone (TCBQ) and volatile amines. The gas–solid reactions of TCBQ with a variety of volatile amines showed a visually distinct color in a time-dependent manner. Moreover, TCBQ can be easily fabricated into simple and flexible rapid test strips for detecting and distinguishing n-propylamine from other volatile amines, including ethylamine, n-butyamine, n-pentamine, n-butyamine and dimethylamine, in less than 3 s without any equipment assistance. Full article
(This article belongs to the Special Issue Advances in Green Analytical Chemistry)
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Review

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23 pages, 1480 KiB  
Review
A Review: Subcritical Water Extraction of Organic Pollutants from Environmental Matrices
by Erdal Yabalak, Mohammad Tahir Aminzai, Ahmet Murat Gizir and Yu Yang
Molecules 2024, 29(1), 258; https://doi.org/10.3390/molecules29010258 - 3 Jan 2024
Cited by 7 | Viewed by 2610
Abstract
Most organic pollutants are serious environmental concerns globally due to their resistance to biological, chemical, and photolytic degradation. The vast array of uses of organic compounds in daily life causes a massive annual release of these substances into the air, water, and soil. [...] Read more.
Most organic pollutants are serious environmental concerns globally due to their resistance to biological, chemical, and photolytic degradation. The vast array of uses of organic compounds in daily life causes a massive annual release of these substances into the air, water, and soil. Typical examples of these substances include pesticides, polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs). Since they are persistent and hazardous in the environment, as well as bio-accumulative, sensitive and efficient extraction and detection techniques are required to estimate the level of pollution and assess the ecological consequences. A wide variety of extraction methods, including pressurized liquid extraction, microwave-assisted extraction, supercritical fluid extraction, and subcritical water extraction, have been recently used for the extraction of organic pollutants from the environment. However, subcritical water has proven to be the most effective approach for the extraction of a wide range of organic pollutants from the environment. In this review article, we provide a brief overview of the subcritical water extraction technique and its application to the extraction of PAHs, PCBs, pesticides, pharmaceuticals, and others form environmental matrices. Furthermore, we briefly discuss the influence of key extraction parameters, such as extraction time, pressure, and temperature, on extraction efficiency and recovery. Full article
(This article belongs to the Special Issue Advances in Green Analytical Chemistry)
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