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Falahi S, Kubiak A, Voronkina A, Ehrlich H, Joseph Y, Rahimi P. Simultaneous Electrochemical Detection of Dopamine and Tryptophan Using 3D Goethite-Spongin Composites. Biomimetics (Basel) 2024; 9:357. [PMID: 38921236 PMCID: PMC11202307 DOI: 10.3390/biomimetics9060357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 06/03/2024] [Accepted: 06/12/2024] [Indexed: 06/27/2024] Open
Abstract
In this study, a facile approach for simultaneous determination of dopamine (DA) and tryptophan (TRP) using a 3D goethite-spongin-modified carbon paste electrode is reported. The prepared electrode exhibited excellent electrochemical catalytic activity towards DA and TRP oxidation. The electrochemical sensing of the modified electrode was investigated using cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Through differential pulse voltammetry analysis, two well-separated oxidation peaks were observed at 28 and 77 mV, corresponding to the oxidation of DA and TRP at the working electrode, with a large peak separation of up to 490 mV. DA and TRP were determined both individually and simultaneously in their dualistic mixture. As a result, the anodic peak currents and the concentrations of DA and TRP were found to exhibit linearity within the ranges of 4-246 μM for DA and 2 to 150 μM for TRP. The detection limits (S/N = 3) as low as 1.9 μM and 0.37 μM were achieved for DA and TRP, respectively. The proposed sensor was successfully applied to the simultaneous determination of DA and TRP in human urine samples with satisfactory recoveries (101% to 116%).
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Affiliation(s)
- Sedigheh Falahi
- Institute of Nanoscale and Biobased Materials, Faculty of Materials Science and Material Technology, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany; (S.F.); (Y.J.)
| | - Anita Kubiak
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland; (A.K.); (H.E.)
- Center of Advanced Technology, Adam Mickiewicz University, Uniwersytetu Poznanskiego 10, 61-614 Poznan, Poland
| | - Alona Voronkina
- Department of Pharmacy, National Pirogov Memorial Medical University, Vinnytsya, Pyrogov Street 56, 21018 Vinnytsia, Ukraine;
| | - Hermann Ehrlich
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland; (A.K.); (H.E.)
- Faculty of Chemical Technology, Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
| | - Yvonne Joseph
- Institute of Nanoscale and Biobased Materials, Faculty of Materials Science and Material Technology, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany; (S.F.); (Y.J.)
- Freiberg Water Research Center, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany
| | - Parvaneh Rahimi
- Institute of Nanoscale and Biobased Materials, Faculty of Materials Science and Material Technology, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany; (S.F.); (Y.J.)
- Freiberg Water Research Center, Technische Universität Bergakademie Freiberg, 09599 Freiberg, Germany
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Wang Y, Kong H, Chen R, Xu Z, Zhou P, Zhan Y, Huang W, Cheng H, Li L, Feng J. Determination of Aminophylline in Human Serum Using Hydrogel Microspheres for Coupled Surface-Enhanced Raman Spectroscopy (SERS) and Solid-Phase Extraction. APPLIED SPECTROSCOPY 2024; 78:551-560. [PMID: 38389424 DOI: 10.1177/00037028241233016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Aminophylline (AMP) is a bronchodilator. The therapeutic and toxic doses are very close. Therefore, therapeutic drug monitoring (TDM) of AMP is essential in clinical practice. Microgels were synthesized by free radical precipitation polymerization. Silver@poly(N-isopropyl acrylamide) (Ag@PNIPAM) hybrid microgels were obtained by loading silver (Ag) nanoparticles into the three-dimensional network of the microgels by in situ reduction. The microgel is a three-dimensional reticular structure with tunable pore size, large specific surface area, and good biocompatibility, which can be used as a sorbent for solid-phase extraction (SPE) of target molecules in complex matrices and as a surface-enhanced Raman spectroscopy (SERS) substrate. We optimized the conditions affecting SERS enhancement, such as silver nitrate (AgNO3) concentration and SPE time, according to the SERS strategy of Ag@PNIPAM hybrid microgels to achieve label-free TDM for trace AMP in human serum. The results showed good linearity between the logarithmic concentration of AMP and its SERS intensity in the range of 1-1.1 × 102 µg/mL, with a correlation coefficient (R2) of 0.9947 and a low detection limit of 0.61 µg/mL. The assay accuracy was demonstrated by spiking experiments, with recoveries ranging from 93.0 to 101.8%. The method is rapid, sensitive, reproducible, requires simple sample pretreatment, and has good potential for use in clinical treatment drug monitoring.
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Affiliation(s)
- Ying Wang
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
| | - Hongxing Kong
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
| | - Ruijue Chen
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
| | - Ziwei Xu
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
| | - Pei Zhou
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
| | - Yaqin Zhan
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
| | - Wenyi Huang
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
- Province and Ministry Co-Sponsored Collaborative Innovation Center of Sugarcane and Sugar Industry, Nanning, Guangxi, China
| | - Hao Cheng
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
- Province and Ministry Co-Sponsored Collaborative Innovation Center of Sugarcane and Sugar Industry, Nanning, Guangxi, China
| | - Lijun Li
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
- Province and Ministry Co-Sponsored Collaborative Innovation Center of Sugarcane and Sugar Industry, Nanning, Guangxi, China
| | - Jun Feng
- Guangxi Key Laboratory of Green Processing of Sugar Resources, Faculty of Medicine/College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou City, Guangxi, China
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Abdelhamid NS, Abdelaleem EA, Lashien A, Amin MM, Tohamy SI. The improvement of routine drug quality control analysis of some antihypertensive drugs using high-performance thin-layer chromatography densitometry method with greenness profile evaluation. J Sep Sci 2024; 47:e2300608. [PMID: 38066390 DOI: 10.1002/jssc.202300608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/20/2023] [Accepted: 11/24/2023] [Indexed: 01/19/2024]
Abstract
The common antihypertensive drugs are B-blockers and diuretics. For the determination of beta-blocker medicines (bisoprolol fumarate and carvedilol) and diuretic drug (Furosemide), new and accurate chromatographic method has been developed. The separation was achieved using a developing system that includes chloroform:methanol:ethyl acetate:ammonia (6:2:2:0.2 by volume) as a mobile phase and the bands were detected at 240 nm. The concentration ranges were 5-25, 1-7, and 1-3.5 μg/band for bisoprolol fumarate, carvedilol, and furosemide, respectively. This chromatographic approach is the first methodology for simultaneously determining bisoprolol fumarate, carvedilol, and furosemide in their pure forms and in their pharmaceutical dosage forms. The advantages of using known analytical procedures are their simplicity, speed, cost effectiveness, lack of laboriousness, and ability to save time as the three tablets are determined in one step and can be used for routine analysis of the investigated combinations in quality control laboratories. According to International Conference of Harmonization guidelines, the established procedures have been validated, and the results were statistically compared to those obtained by the reported reversed-phase-high-performance liquid chromatography methods using Student's t-test and F-test, with no significant difference between them, indicating that the proposed methods can be used for routine drug quality control analysis.
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Affiliation(s)
- Nessreen S Abdelhamid
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Eglal A Abdelaleem
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Adel Lashien
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Nahda University, Sharq El Nile, Beni-Suef, Egypt
| | - Mahmoud M Amin
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Nahda University, Sharq El Nile, Beni-Suef, Egypt
| | - Salwa I Tohamy
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
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Parshina A, Yelnikova A, Safronova E, Kolganova T, Bobreshova O, Yaroslavtsev A. Potentiometric Sensor Arrays Based on Hybrid PFSA/CNTs Membranes for the Analysis of UV-Degraded Drugs. Polymers (Basel) 2023; 15:2682. [PMID: 37376327 DOI: 10.3390/polym15122682] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/10/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
The degradation of drugs is a substantial problem since it affects the safety and effectiveness of pharmaceutical products, as well as their influence on the environment. A novel system of three potentiometric cross-sensitive sensors (using the Donnan potential (DP) as an analytical signal) and a reference electrode was developed for the analysis of UV-degraded sulfacetamide drugs. The membranes for DP-sensors were prepared by a casting procedure from a dispersion of perfluorosulfonic acid (PFSA) polymer, containing carbon nanotubes (CNTs), whose surface was preliminarily modified with carboxyl, sulfonic acid, or (3-aminopropyl)trimethoxysilanol groups. A correlation between the sorption and transport properties of the hybrid membranes and cross-sensitivity of the DP-sensor to sulfacetamide, its degradation product, and inorganic ions was revealed. The analysis of the UV-degraded sulfacetamide drugs using the multisensory system based on hybrid membranes with optimized properties did not require a pre-separation of the components. The limits of detection of sulfacetamide, sulfanilamide, and sodium were 1.8 × 10-7, 5.8 × 10-7, and 1.8 × 10-7 M. The relative errors of the determination of the components of the UV-degraded sulfacetamide drugs were 2-3% (at 6-8% relative standard deviation). PFSA/CNT hybrid materials provided the stable work of the sensors for at least one year.
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Affiliation(s)
- Anna Parshina
- Department of Analytical Chemistry, Voronezh State University, 394018 Voronezh, Russia
| | - Anastasia Yelnikova
- Department of Analytical Chemistry, Voronezh State University, 394018 Voronezh, Russia
| | - Ekaterina Safronova
- Kurnakov Institute of General and Inorganic Chemistry RAS, 119991 Moscow, Russia
| | - Tatyana Kolganova
- Department of Analytical Chemistry, Voronezh State University, 394018 Voronezh, Russia
| | - Olga Bobreshova
- Department of Analytical Chemistry, Voronezh State University, 394018 Voronezh, Russia
| | - Andrey Yaroslavtsev
- Kurnakov Institute of General and Inorganic Chemistry RAS, 119991 Moscow, Russia
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Liu YJ, Bian Y, Zhang Y, Zhang YX, Ren A, Lin SH, Feng XS, Zhang XY. Diuretics in Different Samples: Update on the Pretreatment and Analysis Techniques. Crit Rev Anal Chem 2023:1-33. [PMID: 37130012 DOI: 10.1080/10408347.2023.2202260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Diuretics are drugs that promote the excretion of water and electrolytes in the body and produce diuretic effects. Clinically, they are often used in the treatment of edema caused by various reasons and hypertension. In sports, diuretics are banned by the World Anti-Doping Agency (WADA). Therefore, in order to monitor blood drug concentration, identify drug quality and maintain the fairness of sports competition, accurate, rapid, highly selective and sensitive detection methods are essential. This review provides a comprehensive summary of the pretreatment and detection of diuretics in various samples since 2015. Commonly used techniques to extract diuretics include liquid-liquid extraction, liquid-phase microextraction, solid-phase extraction, solid-phase microextraction, among others. Determination methods include methods based on liquid chromatography, fluorescent spectroscopy, electrochemical sensor method, capillary electrophoresis and so on. The advantages and disadvantages of various pretreatment and analytical techniques are elaborated. In addition, future development prospects of these techniques are discussed.
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Affiliation(s)
- Ya-Jie Liu
- School of Pharmacy, China Medical University, Shenyang, China
| | - Yu Bian
- School of Pharmacy, China Medical University, Shenyang, China
| | - Yuan Zhang
- School of Pharmacy, China Medical University, Shenyang, China
| | - Yi-Xin Zhang
- School of Pharmacy, China Medical University, Shenyang, China
| | - Ai Ren
- School of Pharmacy, China Medical University, Shenyang, China
| | - Shu-Han Lin
- School of Food Science and Engineering, Dalian Ocean University, Dalian, China
| | - Xue-Song Feng
- School of Pharmacy, China Medical University, Shenyang, China
| | - Xin-Yuan Zhang
- School of Forensic Medicine, China Medical University, Shenyang, China
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Zhao X, Zhang L, Chu Z, Wang Q, Cao Y, Cao J, Li J, Lei W, Zhang B, Si W. Fe–Decorated Nitrogen–Doped Carbon Nanospheres as an Electrochemical Sensing Platform for the Detection of Acetaminophen. Molecules 2023; 28:molecules28073006. [PMID: 37049770 PMCID: PMC10095704 DOI: 10.3390/molecules28073006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 03/30/2023] Open
Abstract
In this work, Fe–decorated nitrogen–doped carbon nanospheres are prepared for electrochemical monitoring of acetaminophen. Via a direct pyrolysis of the melamine–formaldehyde resin spheres, the well–distributed Fe–NC spheres were obtained. The as–prepared Fe–NC possesses enhanced catalysis towards the redox of acetaminophen for abundant active sites and high–speed charge transfer. The effect of loading Fe species on the electrochemical sensing of acetaminophen is investigated in detail. The synergistic effect of nitrogen doping along with the above–mentioned properties is taken advantage of in the fabrication of electrochemical sensors for the acetaminophen determination. Based on the calibration plot, the limits of detection (LOD) were calculated to be 0.026 μM with a linear range from 0–100 μM. Additionally satisfactory repeatability, stability, and selectivity are obtained.
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Affiliation(s)
- Xiangchuan Zhao
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
- Institute of Advanced Materials, Shandong Institutes of Industrial Technology, Jinan 250000, China
| | - Liping Zhang
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
| | - Zhaoyun Chu
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
| | - Qing Wang
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
| | - Yue Cao
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
| | - Jun Cao
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
| | - Jiao Li
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
| | - Wu Lei
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Xiaolingwei 200th, Nanjing 210094, China
| | - Boming Zhang
- Institute of Advanced Materials, Shandong Institutes of Industrial Technology, Jinan 250000, China
| | - Weimeng Si
- School of Materials Science and Engineering, Shandong University of Technology, Xincunxi Road 266th, Zibo 255000, China
- Correspondence:
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7
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Abo Zaid MH, El-Enany N, Mostafa AE, Hadad GM, Belal F. Use of green fluorescent nano-sensors for the determination of furosemide in biological samples and pharmaceutical preparations. BMC Chem 2023; 17:25. [PMID: 36964587 PMCID: PMC10039510 DOI: 10.1186/s13065-023-00937-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 03/13/2023] [Indexed: 03/26/2023] Open
Abstract
BACKGROUND Carbon quantum dots (CQDs) are new class of carbon nanoparticles. Recently, they have been widely used as fluorescent probes due to their easy accessibility, optical properties and chemical inertness. Many available precursors are used in the synthesis of carbon quantum dots. The electrical and optical properties of CQDs could be enhanced by doping hetero atoms such as nitrogen or sulfur into their structure. OBJECTIVE The current work presents the synthesis and characterization of water-soluble nitrogen doped carbon quantum dots (N-CQDs) and their use as fluorescent nano-sensors for the spectrofluorimetric determination of furosemide in its pharmaceutical preparations and spiked human plasma. METHODS A domestic microwave was used to prepare the N-CQDs by heating a solution of sucrose and urea till complete charring (about ten minutes). The produced N-CQDs exhibit a strong emission band at 376 nm after excitation at 216 nm. Furosemide caused a quantitative quenching in the fluorescence intensity of the produced N-CQDs. RESULTS The proposed method was validated according to ICH Guidelines. The method was found to be linear over the range of 0.1-1.0 µg/mL with LOQ of 0.087 µg/ml. CONCLUSION Ecofriendly nano fluorescent sensors (N-CQDs) were successfully synthesized. The size of N-CQDs was distributed in the range of 6.63 nm to 10.23 nm with an average of 8.2 nm. The produced N-CQDs were used as fluorescent probes for the estimation of furosemide in its pharmaceutical preparations as well as spiked human plasma samples.
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Affiliation(s)
- Mona H Abo Zaid
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa, 35712, Egypt.
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia, 41522, Egypt.
| | - Nahed El-Enany
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, New Mansoura University, New Mansoura, 7723730, Egypt
| | - Aziza E Mostafa
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia, 41522, Egypt
| | - Ghada M Hadad
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia, 41522, Egypt
| | - Fathalla Belal
- Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
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Zorina M, Dotsenko VV, Nesterenko PN, Temerdashev A, Dmitrieva E, Feng YQ, Atapattu SN. Phthalylglycyl Chloride as a Derivatization Agent for UHPLC-MS/MS Determination of Adrenaline, Dopamine and Octopamine in Urine. Molecules 2023; 28:molecules28072900. [PMID: 37049663 PMCID: PMC10095875 DOI: 10.3390/molecules28072900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/16/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
Dopamine, adrenaline and octopamine are small polar molecules that play a vital role in regulatory systems. In this paper, phthalylglycyl chloride was proposed as a derivatization agent for octopamine, adrenaline and dopamine determination in urine for the first time. The derivatization procedure facilitated the use of reversed-phase liquid chromatography with positive electrospray ionization-high-resolution mass spectrometry. An LC-HRMS method was developed that provided quantification limits of 5 ng/mL and detection limits of 1.5 ng/mL for all analytes. The 95-97% yield of derivates was observed after a 10 min derivatization with phthalylglycyl chloride at pH 6.5 and 30 °C. The proposed method was successfully applied to the analysis of human urine samples. The obtained results were compared with those of conventional derivatization procedures with 9-fluorenyl-methoxycarbonyl chloride and dansyl chloride.
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Affiliation(s)
- Maria Zorina
- Analytical Chemistry Department, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Victor V Dotsenko
- Analytical Chemistry Department, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
- Department of Organic and Analytical Chemistry, North-Caucasus Federal University, 1 Pushkina St., 355000 Stavropol, Russia
| | - Pavel N Nesterenko
- M.V. Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia
| | - Azamat Temerdashev
- Analytical Chemistry Department, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Ekaterina Dmitrieva
- Analytical Chemistry Department, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, Russia
| | - Yu-Qi Feng
- Department of Chemistry, Wuhan University, Wuhan 430072, China
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Ultrasensitive and Simple Dopamine Electrochemical Sensor Based on the Synergistic Effect of Cu-TCPP Frameworks and Graphene Nanosheets. Molecules 2023; 28:molecules28062687. [PMID: 36985659 PMCID: PMC10051941 DOI: 10.3390/molecules28062687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/09/2023] [Accepted: 03/13/2023] [Indexed: 03/19/2023] Open
Abstract
Dopamine (DA) is an important neurotransmitter. Abnormal concentration of DA can result in many neurological diseases. Developing reliable determination methods for DA is of great significance for the diagnosis and monitoring of neurological diseases. Here, a novel and simple electrochemical sensing platform for quantitative analysis of DA was constructed based on the Cu-TCPP/graphene composite (TCPP: Tetrakis(4-carboxyphenyl)porphyrin). Cu-TCPP frameworks were selected in consideration of their good electrochemical sensing potential. The graphene nanosheets with excellent conductivity were then added to further improve the sensing efficiency and stability of Cu-TCPP frameworks. The electrochemical properties of the Cu-TCPP/graphene composite were characterized, showing its large electrode active area, fast electron transfer, and good sensing performance toward DA. The signal enhancement mechanism of DA was explored. Strong accumulation ability and high electrocatalytic rate were observed on the surface of Cu-TCPP/graphene-modified glassy carbon electrode (Cu-TCPP/graphene/GCE). Based on the synergistic sensitization effect, an ultrasensitive and simple DA electrochemical sensor was developed. The linear range is 0.02–100 and 100–1000 µM, and the detection limit is 3.6 nM for the first linear range. It was also successfully used in detecting DA in serum samples, and a satisfactory recovery was obtained.
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The Application of Dopamine Combined with Intravenous Furosemide Infusion Therapy Has an Apparent Clinical Effect in Treating Patients with Heart Failure. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:1055160. [PMID: 36034940 PMCID: PMC9410776 DOI: 10.1155/2022/1055160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 07/24/2022] [Accepted: 07/26/2022] [Indexed: 11/17/2022]
Abstract
Objective To observe the efficacy and safety of dopamine plus furosemide in treating patients with heart failure. Methods This research included 150 patients with heart failure who were diagnosed and treated at our hospital between March 2018 and November 2020. The patients were randomly assigned to a study group or a reference group according to the data of admission (the cut-off date was June 2019). Patients in the reference group were given furosemide, whereas those in the study group were given dopamine plus furosemide intravenous pumping. Outcome measures included clinical effectiveness, heart function changes, and adverse responses. Results Dopamine plus furosemide resulted in higher treatment efficiency (96.00%) versus furosemide (74.67%) study group (P < 0.05). Before therapy, there was no significant change in the scores of cardiac function indices between the two groups (P > 0.05). The cardiac function of the two groups of patients was improved after treatment, and the left ventricular ejection fraction (LVEF) of the study group (44.85 ± 4.12) was higher than that of the reference group (38.45 ± 4.36), and the left ventricular end-systolic diameter (LVESD), left ventricular end-diastolic diameter (LVESD), and plasma N-terminal pro-B-type natriuretic peptide (NT-proBNP) (43.17 ± 3.98, 51.32 ± 4.25, 3045.56 ± 365.48) were lower than the reference group (47.56 ± 4.65, 56.28 ± 4.85, 4856.48 ± 395.46) (P < 0.05). There was no significant difference in the total incidence of adverse reactions between the two groups (P > 0.05). Conclusion Dopamine plus intravenous furosemide infusion treatment has an obvious therapeutic benefit in treating patients with heart failure and dramatically enhances cardiac function without noteworthy adverse responses. It demonstrated great potential for clinical promotion.
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A Fast and Validated HPLC Method for the Simultaneous Analysis of Five 5-HT 3 Receptor Antagonists via the Quantitative Analysis of Multicomponents by a Single Marker. Int J Anal Chem 2021; 2021:5533646. [PMID: 34257662 PMCID: PMC8257339 DOI: 10.1155/2021/5533646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/27/2021] [Accepted: 06/01/2021] [Indexed: 11/26/2022] Open
Abstract
In this study, a new strategy for the simultaneous quantization of five serotonin 5-hydroxytryptamine receptor antagonists—ondansetron, azasetron, ramosetron, granisetron, and tropisetron—either in infusion samples or in injection dosage form was first established based on high-performance liquid chromatography combined with a quantitative analysis of multiple components by a single marker. The quantitative analysis of multicomponents by a single marker method was conducted with ondansetron as an internal reference substance and performed using relative retention time and ultraviolet spectral similarity as the double indicator. The quantitative analysis of the 5-HT3 receptor antagonists was calculated and investigated based on the relative correction factors. Chromatographic separation was achieved using a C18 column (150 mm × 4.6 mm, 5.0 μm), and the mobile phase was composed of acetonitrile-0.05 mol·L−1 potassium dihydrogen phosphate (pH 4.0) (25 : 75) at a flow rate of 1.0 mL·min−1 and detection wavelengths of 307 nm (ondansetron, azasetron, ramosetron), 302 nm (granisetron), and 285 nm (tropisetron). In addition, the accuracy of the quantitative analysis of multicomponents by a single marker method was compared with an external standard method, and no significant difference was observed between the two methods. The established method is rapid, is easy, and does not require many reference substances, and it can been successfully applied as part of the quality control of the five 5-HT3 receptor antagonists in their injection dosage form and infusion sample drugs in hospitals.
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