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Li H, Reinhart B, Moller S, Herndon E. Effects of C/Mn Ratios on the Sorption and Oxidative Degradation of Small Organic Molecules on Mn-Oxides. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:741-750. [PMID: 36535081 DOI: 10.1021/acs.est.2c03633] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Manganese (Mn) oxides have a high surface area and redox potential that facilitate sorption and/or oxidation of organic carbon (OC), but their role in regulating soil C storage is relatively unexplored. Small OC compounds with distinct structures were reacted with Mn(III/IV)-oxides to investigate the effects of OC/Mn molar ratios on Mn-OC interaction mechanisms. Dissolved and solid-phase OC and Mn were measured to quantify the OC sorption to and/or the redox reaction with Mn-oxides. Mineral transformation was evaluated using X-ray diffraction and X-ray absorption spectroscopy. Higher OC/Mn ratios resulted in higher sorption and/or redox transformation; however, interaction mechanisms differed at low or high OC/Mn ratios for some OC. Citrate, pyruvate, ascorbate, and catechol induced Mn-oxide dissolution. The average oxidation state of Mn in the solid phase did not change during the reaction with citrate, suggesting ligand-promoted mineral dissolution, but decreased significantly during reactions with the other compounds, suggesting reductive dissolution mechanisms. Phthalate primarily sorbed on Mn-oxides with no detectable formation of redox products. Mn-OC interactions led primarily to C loss through OC oxidation into inorganic C, except phthalate, which was predominantly immobilized in the solid phase. Together, these results provided detailed fundamental insights into reactions happening at organo-mineral interfaces in soils.
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Affiliation(s)
- Hui Li
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, North Carolina27695, United States
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee37831, United States
| | - Benjamin Reinhart
- X-ray Science Division, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Spencer Moller
- Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware19716, United States
| | - Elizabeth Herndon
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee37831, United States
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2
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Smartphone-assisted Colorimetric Sensor based on Nanozyme for On-Site Glucose Monitoring. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Firdaus ML, Saputra E, Ginting SM, Wyantuti S, Eddy DR, Rahmidar L, Yuliarto B. Smartphone-based digital image colorimetry for non-enzymatic detection of glucose using gold nanoparticles. SENSING AND BIO-SENSING RESEARCH 2022. [DOI: 10.1016/j.sbsr.2022.100472] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Almalki AH, Naguib IA, Alshehri FS, Alghamdi BS, Alsaab HO, Althobaiti YS, Alshehri S, Abdallah FF. Application of Three Ecological Assessment Tools in Examining Chromatographic Methods for the Green Analysis of a Mixture of Dopamine, Serotonin, Glutamate and GABA: A Comparative Study. Molecules 2021; 26:5436. [PMID: 34576907 PMCID: PMC8467375 DOI: 10.3390/molecules26185436] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 07/13/2021] [Accepted: 07/16/2021] [Indexed: 12/28/2022] Open
Abstract
The assessment of greenness of analytical protocols is of great importance now to preserve the environment. Some studies have analyzed either only the neurotransmitters, dopamine, serotonin, glutamate, and gamma-aminobutyric acid (GABA), together or with other neurotransmitters and biomarkers. However, these methods have not been investigated for their greenness and were not compared with each other to find the optimum one. Therefore, this study aims to compare seven published chromatographic methods that analyzed the four neurotransmitters and their mixtures using the National Environmental Method Index, Analytical Eco-Scale Assessment (ESA), and Green Analytical Procedure Index (GAPI). As these methods cover both qualitative and quantitative aspects, they offer better transparency. Overall, GAPI showed maximum greenness throughout the analysis. Method 6 was proven to be the method of choice for analyzing the mixture, owing to its greenness, according to NEMI, ESA, and GAPI. Additionally, method 6 has a wide scope of application (13 components can be analyzed), high sensitivity (low LOQ values), and fast analysis (low retention times, especially for glutamate and GABA).
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Affiliation(s)
- Atiah H. Almalki
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (H.O.A.); (Y.S.A.)
| | - Ibrahim A. Naguib
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Fahad S. Alshehri
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia;
| | - Badrah S. Alghamdi
- Neuroscience Unit, Department of Physiology, Faculty of Medicine, King Abdulaziz University, Jeddah 22252, Saudi Arabia;
- Pre-Clinical Research Unit, King Fahad Medical Research Center, King Abdulaziz University, Jeddah 22252, Saudi Arabia
| | - Hashem O. Alsaab
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (H.O.A.); (Y.S.A.)
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Yusuf S. Althobaiti
- Addiction and Neuroscience Research Unit, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia; (H.O.A.); (Y.S.A.)
- Department of Pharmacology and Toxicology, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Sameer Alshehri
- Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Fatma F. Abdallah
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62514, Egypt;
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Kopiec G, Starzec K, Kochana J, Kinnunen-Skidmore TP, Schuhmann W, Campbell WH, Ruff A, Plumeré N. Bioelectrocatalytic and electrochemical cascade for phosphate sensing with up to 6 electrons per analyte molecule. Biosens Bioelectron 2018; 117:501-507. [PMID: 29982120 DOI: 10.1016/j.bios.2018.06.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 06/09/2018] [Accepted: 06/24/2018] [Indexed: 01/08/2023]
Abstract
Despite the availability of numerous electroanalytical methods for phosphate quantification, practical implementation in point-of-use sensing remains virtually nonexistent because of interferences from sample matrices or from atmospheric O2. In this work, phosphate determination is achieved by the purine nucleoside phosphorylase (PNP) catalyzed reaction of inosine and phosphate to produce hypoxanthine which is subsequently oxidized by xanthine oxidase (XOx), first to xanthine and then to uric acid. Both PNP and XOx are integrated in a redox active Os-complex modified polymer, which not only acts as supporting matrix for the bienzymatic system but also shuttles electrons from the hypoxanthine oxidation reaction to the electrode. The bienzymatic cascade in this second generation phosphate biosensor selectively delivers four electrons for each phosphate molecule present. We introduced an additional electrochemical process involving uric acid oxidation at the underlying electrode. This further enhances the anodic current (signal amplification) by two additional electrons per analyte molecule which mitigates the influence of electrochemical interferences from the sample matrix. Moreover, while the XOx catalyzed reaction is sensitive to O2, the uric acid production and therefore the delivery of electrons through the subsequent electrochemical process are independent of the presence of O2. Consequently, the electrochemical process counterbalances the O2 interferences, especially at low phosphate concentrations. Importantly, the electrochemical uric acid oxidation specifically reports on phosphate concentration since it originates from the product of the bienzymatic reactions. These advantageous properties make this bioelectrochemical-electrochemical cascade particularly promising for point-of-use phosphate measurements.
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Affiliation(s)
- Gabriel Kopiec
- Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Karolina Starzec
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, 30-060 Krakow, Poland
| | - Jolanta Kochana
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, 30-060 Krakow, Poland
| | | | - Wolfgang Schuhmann
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Wilbur H Campbell
- The Nitrate Elimination Co., Inc. (NECi), Lake Linden, MI 49945, United States
| | - Adrian Ruff
- Analytical Chemistry - Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany.
| | - Nicolas Plumeré
- Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, D-44780 Bochum, Germany.
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Korany MA, Mahgoub H, Haggag RS, Ragab MAA, Elmallah OA. Green chemistry: Analytical and chromatography. J LIQ CHROMATOGR R T 2017. [DOI: 10.1080/10826076.2017.1373672] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Mohamed A. Korany
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Alexandria, El-Messalah, Alexandria, Egypt
| | - Hoda Mahgoub
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Alexandria, El-Messalah, Alexandria, Egypt
| | - Rim S. Haggag
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Alexandria, El-Messalah, Alexandria, Egypt
- Department of Analytical and Pharmaceutical Chemistry, Faculty of Pharmacy and Drug Manufacturing, Pharos University in Alexandria, Somouha, Alexandria, Egypt
| | - Marwa A. A. Ragab
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, University of Alexandria, El-Messalah, Alexandria, Egypt
| | - Osama A. Elmallah
- SPIMACO MISR for Pharmaceutical Industries, Borg El-Arab, Alexandria, Egypt
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