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Hamad AA. The first facile optical density-dependent approach for the analysis of doxorubicin, an oncogenic agent accompanied with the co-prescribed drug; paclitaxel. BMC Chem 2023; 17:59. [PMID: 37328912 DOI: 10.1186/s13065-023-00976-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 05/30/2023] [Indexed: 06/18/2023] Open
Abstract
Doxorubicin (DRB) is an anthracycline oncogenic drug extracted from cultures of Streptomyces peucetius var. caesius. It is frequently recommended as an anti-neoplastic agent for the treatment of diverse malignancies. It exerts its antineoplastic effect either via inhibiting the enzyme topoisomerase II and/or via intercalation to DNA or reactive oxygen species generation. In the present article, the direct, simple, one-pot, somewhat eco-safe, and non-extractive spectrophotometric system was executed to track doxorubicin, a chemotherapeutic remedy, in the presence of paclitaxel, a naturally occurring Taxan antineoplastic radical, through the greenness rated method. DRB's optical density was studied in various mediums and solvents to develop the current approach. An acidic ethanolic solution was found to increase the optical density of the sample significantly. At 480 nm., the most remarkable optical density was obtained. Various experimental factors, including intrinsic media, solvent, pH, and stability time, were investigated and controlled. The current approach achieved linearity within the 0.6-40.0 µg mL-1 range, accompanied by a limit of both detection and quantification (LOD and LOQ) of 0.18 and 0.55 µg mL-1, correspondingly. The approach was validated under the ICH guidelines (Quality Guidelines). The system's greenness and enhancement degree were estimated.
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Affiliation(s)
- Ahmed Abdulhafez Hamad
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Al-Azhar University, Assiut Branch, Assiut, 71524, Egypt.
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2
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Mokhtari A, Barati M, Karimian H, Keyvanfard M. A molecularly imprinted polymerized high internal phase emulsion adsorbent for sensitive chemiluminescence determination of clopidogrel. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 265:120371. [PMID: 34536890 DOI: 10.1016/j.saa.2021.120371] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 08/25/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
A molecularly imprinted polymerized high internal phase emulsion (MIP-polyHIPE) adsorbent was used for selective separating and preconcentrating the anti-plaque drug, clopidogrel. For the first time in this study, chemiluminescence (CL) methods were evaluated for the determination of clopidogrel. The synthesis of adsorbents by the emulsion templating method showed that the sensitivity of the method can be increased up to 42 times. The determination of clopidogrel was evaluated by Ru(phen)32+-Cerium (IV), KMnO4-H2SO4, KMnO4-H2SO4-Na2SO3, and luminol-H2O2 CL systems. According to the results, only the Ru(phen)32+-Cerium (IV) CL system showed a reasonable sensitivity for clopidogrel. Using MIP-polyHIPE adsorbent, the linear range, the limit of detection, and relative standard deviation for clopidogrel in this system were respectively 1.0 × 10-9-8.0 × 10-8 mol L-1, 3.0 × 10-10 mol L-1, and 6.3% (n = 4, 1.0 × 10-8). The proposed method was employed for determining clopidogrel in pharmaceuticals and blood serum samples. The results showed the good sensitivity and accuracy of the proposed method.
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Affiliation(s)
- Ali Mokhtari
- Department of Chemistry, Golestan University, Gorgan, Iran.
| | - Mozhdeh Barati
- Department of Chemistry, Golestan University, Gorgan, Iran
| | - Hossein Karimian
- Department of Chemical Engineering, Golestan University, Aliabad Katool, Iran
| | - Mohsen Keyvanfard
- Department of Chemistry, Majlesi Branch, Islamic Azad University, Majlesi, Iran
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3
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Facile one-pot green solvent synergized fluorescence reaction for determination of doxorubicin in presence of paclitaxel; co-administered drug, application to stability study and analysis in bulk, vial and biological fluids. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.09.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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4
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Application of molecularly imprinted polymers and dual-emission carbon dots hybrid for ratiometric determination of chloramphenicol in milk. Food Chem Toxicol 2020; 146:111806. [PMID: 33039435 DOI: 10.1016/j.fct.2020.111806] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/22/2020] [Accepted: 10/04/2020] [Indexed: 10/23/2022]
Abstract
Chloramphenicol (CLP) is a veterinary antibiotic that has been banned due to its severe side effects but it is still illegally used in animal husbandry. In this work, the fabrication of simple, fast-response and highly selective ratiometric probe for sensitive visual detection of CLP antibiotic at trace levels in both indoor and outdoor is reported. For the construction of the ratiometric fluorescence probe (mMIP@YBCDs), two kinds of different carbon dots with yellow emission (Y/CDs, 560 nm) and blue emission carbon dots (B/CDs, 440 nm) were used as target sensitive and as reference dyes respectively. Besides, molecularly imprinted mesoporous silica was used as a recognized part of the probe. Upon the addition of different concentrations of CLP, the fluorescence of Y/CDs was quenched significantly while the fluorescence intensity of B/CDs stayed constant which was accompanied by gradual fluorescence color change from yellow-to-blue. The ratiometric probe has a linear response in the range of 0.1-3 μgL-1 with a detection limit 0.035 μgL-1. The practicality of the ratiometric method was validated by the quantification of CLP in milk samples.
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Rezaei B, Hassani Z, Shahshahanipour M, Ensafi AA, Mohammadnezhad G. Application of modified mesoporous boehmite (γ-AlOOH) with green synthesis carbon quantum dots for a fabrication biosensor to determine trace amounts of doxorubicin. LUMINESCENCE 2018; 33:1377-1386. [DOI: 10.1002/bio.3558] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/06/2018] [Accepted: 09/10/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Behzad Rezaei
- Department of Chemistry; Isfahan University of Technology; Isfahan Iran
| | - Zahra Hassani
- Department of Chemistry; Isfahan University of Technology; Isfahan Iran
| | | | - Ali A. Ensafi
- Department of Chemistry; Isfahan University of Technology; Isfahan Iran
| | - G. Mohammadnezhad
- Department of Chemistry; Isfahan University of Technology; Isfahan Iran
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6
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Attallah OA, Al-Ghobashy MA, Ayoub AT, Tuszynski JA, Nebsen M. Computer-aided design of magnetic molecularly imprinted polymer nanoparticles for solid-phase extraction and determination of levetiracetam in human plasma. RSC Adv 2018; 8:14280-14292. [PMID: 35540735 PMCID: PMC9079875 DOI: 10.1039/c8ra02379d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 04/12/2018] [Indexed: 11/21/2022] Open
Abstract
Analytical methods should be accurate and specific to measure plasma drug concentration. Nevertheless, current sample preparation techniques suffer from limitations, including matrix interference and intensive sample preparation. In this study, a novel technique was proposed for the synthesis of a molecularly imprinted polymer (MIP) on magnetic Fe3O4 nanoparticles (NPs) with uniform core–shell structure. The Fe3O4@MIPs NPs were then applied to separate and enrich an antiepileptic drug, levetiracetam, from human plasma. A computational approach was developed to screen the functional monomers and polymerization solvents to provide a suitable design for the synthesized MIP. Different analysis techniques and re-binding experiments were performed to characterize the Fe3O4@MIP NPs, as well as to identify optimal conditions for the extraction process. Adsorption isotherms were best fitted to the Langmuir model and adsorption kinetics were modeled with pseudo-second-order kinetics. The Fe3O4@MIP NPs showed reasonable adsorption capacity and improved imprinting efficiency. A validated colorimetric assay was introduced as a comparable method to a validated HPLC assay for the quantitation of levetiracetam in plasma in the range of 10–80 μg mL−1 after extraction. The results from the HPLC and colorimetric assays showed good precision (between 1.08% and 9.87%) and recoveries (between 94% and 106%) using the Fe3O4@MIP NPs. The limit of detection and limit of quantification were estimated to be 2.58 μg mL−1 and 7.81 μg mL−1, respectively for HPLC assay and 2.32 μg mL−1 and 7.02 μg mL−1, respectively for colorimetric assay. It is believed that synthesized Fe3O4@MIP NPs as a sample clean-up technique combined with the proposed assays can be used for determination of levetiracetam in plasma. A novel molecularly imprinted polymer on Fe3O4 nanoparticles was applied to extract antiepileptic drug; levetiracetam from plasma for TDM purposes.![]()
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Affiliation(s)
| | | | - Ahmed Taha Ayoub
- Pharmaceutical Chemistry Department
- Heliopolis University
- El-Salam
- Egypt
| | | | - Marianne Nebsen
- Analytical Chemistry Department
- Faculty of Pharmacy
- Cairo University
- Cairo 11562
- Egypt
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Timofeeva II, Vakh CS, Bulatov AV, Worsfold PJ. Flow analysis with chemiluminescence detection: Recent advances and applications. Talanta 2017; 179:246-270. [PMID: 29310229 DOI: 10.1016/j.talanta.2017.11.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/03/2017] [Accepted: 11/04/2017] [Indexed: 10/18/2022]
Abstract
This article highlights the most important developments in flow analysis with chemiluminescence (CL) detection, describing different flow systems that are compatible with CL detection, detector designs, commonly applied CL reactions and approaches to sample treatment. Recent applications of flow analysis with CL detection (focusing on outputs published since 2010) are also presented. Applications are classified by sample matrix, covering foods and beverages, environmental matrices, pharmaceuticals and biological fluids. Comprehensive tables are provided for each area, listing the specific sample matrix, CL reaction used, linear range, limit of detection and sample treatment for each analyte. Finally, recent and emerging trends in the field are also discussed.
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Affiliation(s)
- Irina I Timofeeva
- Department of Analytical Chemistry, Institute of Chemistry, Saint-Petersburg University, St.Petersburg State University, SPbSU, SPbU, 7/9 Universitetskayanab., St. Petersburg 199034, Russia.
| | - Christina S Vakh
- Department of Analytical Chemistry, Institute of Chemistry, Saint-Petersburg University, St.Petersburg State University, SPbSU, SPbU, 7/9 Universitetskayanab., St. Petersburg 199034, Russia
| | - Andrey V Bulatov
- Department of Analytical Chemistry, Institute of Chemistry, Saint-Petersburg University, St.Petersburg State University, SPbSU, SPbU, 7/9 Universitetskayanab., St. Petersburg 199034, Russia
| | - Paul J Worsfold
- School of Geography, Earth and Environmental Sciences and Biogeochemistry Research Centre, Plymouth University, Plymouth, Devon PL4 8AA, UK
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8
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Jeshycka S, Han HY, Lee HJ. Voltammetric Understanding of Ionizable Doxorubicin Transfer Reactions across Liquid/liquid Interfaces and Sensor Development. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.05.096] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Paziewska−Nowak A, Jankowska−Śliwińska J, Dawgul M, Pijanowska DG. Selective Electrochemical Detection of Pirarubicin by Means of DNA-modified Graphite Biosensor. ELECTROANAL 2017. [DOI: 10.1002/elan.201700067] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Agnieszka Paziewska−Nowak
- Nalecz Institute of Biocybernetics and Biomedical Engineering; PAS; Trojdena St. 4 02-109 Warsaw Poland
| | | | - Marek Dawgul
- Nalecz Institute of Biocybernetics and Biomedical Engineering; PAS; Trojdena St. 4 02-109 Warsaw Poland
| | - Dorota G. Pijanowska
- Nalecz Institute of Biocybernetics and Biomedical Engineering; PAS; Trojdena St. 4 02-109 Warsaw Poland
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10
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Amjadi M, Jalili R. Molecularly imprinted polymer-capped nitrogen-doped graphene quantum dots as a novel chemiluminescence sensor for selective and sensitive determination of doxorubicin. RSC Adv 2016. [DOI: 10.1039/c6ra18184h] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Molecularly imprinted polymer-capped nitrogen-doped graphene quantum dots (MIP@NGQDs) were prepared via a simple sol–gel process and used for chemiluminescence detection of doxorubicin.
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Affiliation(s)
- Mohammad Amjadi
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz 5166616471
- Iran
| | - Roghayeh Jalili
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz 5166616471
- Iran
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11
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Wang Y, Duan H, Li L, Wang X, Li J, Bu Y, Luo C. A chemiluminescence sensor for determination of lysozyme using magnetic graphene oxide multi-walled carbon nanotube surface molecularly imprinted polymers. RSC Adv 2016. [DOI: 10.1039/c5ra20845a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this paper, a new chemiluminescence sensor possessing high selectivity and sensitivity was established for determination of lysozyme using magnetic graphene oxide–multi-walled carbon nanotube surface molecularly imprinted polymer.
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Affiliation(s)
- Yanhui Wang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Huimin Duan
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Leilei Li
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Xiaojiao Wang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Jianbo Li
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Yanan Bu
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Chuannan Luo
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan)
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
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12
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Duan H, Li L, Wang X, Wang Y, Li J, Luo C. A sensitive and selective chemiluminescence sensor for the determination of dopamine based on silanized magnetic graphene oxide-molecularly imprinted polymer. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 139:374-9. [PMID: 25574658 DOI: 10.1016/j.saa.2014.12.051] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 10/29/2014] [Accepted: 12/12/2014] [Indexed: 05/24/2023]
Abstract
Based on silanized magnetic graphene oxide-molecularly imprinted polymer (Si-MG-MIP), a sensitive and selective chemiluminescence sensor for dopamine measurement was developed. Si-MG-MIP, in which silanes was introduced to improve the mass transfer, graphene oxide was employed to improve absorption capacity, Fe3O4 nanoparticles were applied for separation easily and molecularly imprinted polymer was used to improve selectivity, demonstrated the advantages of the sensor. All the composites were confirmed by SEM, TEM, XRD and FTIR. Under the optimal conditions of chemiluminescence, dopamine could be assayed in the range of 8.0-200.0 ng/mL with a correlation coefficient of linear regression of 0.9970. The detection limit was 1.5 ng/mL (3δ) and the precision for 11 replicate detections of 80.0 ng/mL dopamine was 3.4% (RSD). When the sensor was applied in determining dopamine in actual samples, recovery ranged from 94% to 110%, which revealed that the results were satisfactory.
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Affiliation(s)
- Huimin Duan
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Leilei Li
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Xiaojiao Wang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yanhui Wang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Jianbo Li
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Chuannan Luo
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong (University of Jinan), School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
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Wang SR, Wang S. Ionic liquid-based hollow fiber-supported liquid-phase microextraction enhanced electrically for the determination of neutral red. J Food Drug Anal 2014; 22:418-424. [PMID: 28911455 PMCID: PMC9355005 DOI: 10.1016/j.jfda.2014.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 03/27/2014] [Accepted: 03/28/2014] [Indexed: 11/20/2022] Open
Abstract
A method of ionic liquid-based hollow fiber liquid-phase microextraction enhanced electrically was successfully developed and applied to the extraction and determination of neutral red (NR) dye, which was selected as the model analyte. A room temperature ionic liquid, 1-octyl-3-methylimidazolium hexafluorophosphate ([C8mim][PF6]), was placed in the pores of a polytetrafluoethylene hollow fiber, which acts as a liquid membrane and the acceptor solution. The extraction parameters affecting the enrichment factor of NR, such as pH, extraction time, elution time, stirring rate, and the voltage were optimized. In addition, UV–Visible (UV–Vis) or electrochemiluminescence spectra were also determined. The extraction rate and capacity of NR could be improved significantly by cathodic polarization. Under the optimized extraction conditions (organic liquid microextraction phase [C8mim][PF6], pH 7, stirring rate 300 rpm, extraction time 20 minutes, ultrasonic-assisted elution time 3 minutes, voltage −70 V), the detection limit of 0.38 μg/L and linear correlation coefficient of r > 0.99 were obtained. The established method was successfully applied to the analysis of three soft drink samples, which were spiked with NR standards at the concentrations of 0.1, 1.0, and 5.0 mg/L, and satisfactory results were obtained.
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Affiliation(s)
- Shi-Ru Wang
- Faculty of Materials Science and Chemical Engineering, State Key Laboratory Base of Novel Functional Materials and Preparation Science, Ningbo University, Ningbo 315211, China
| | - Sui Wang
- Faculty of Materials Science and Chemical Engineering, State Key Laboratory Base of Novel Functional Materials and Preparation Science, Ningbo University, Ningbo 315211, China.
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Formulation and evaluation of controlled-release of telmisartan microspheres: In vitro/in vivo study. J Food Drug Anal 2014; 22:542-548. [PMID: 28911472 PMCID: PMC9354994 DOI: 10.1016/j.jfda.2014.05.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 05/02/2014] [Accepted: 05/12/2014] [Indexed: 11/23/2022] Open
Abstract
The aim of this work was to design a controlled-release drug-delivery system for the angiotensin-II receptor antagonist drug telmisartan. Telmisartan was encapsulated with different EUDRAGIT polymers by an emulsion solvent evaporation technique and the physicochemical properties of the formulations were characterized. Using a solvent evaporation method, white spherical microspheres with particle sizes of 629.9–792.1 μm were produced. The in vitro drug release was studied in three different pH media (pH 1.2 for 2 hours, pH 6.8 for 4 hours, and pH 7.4 for 18 hours). The formulations were then evaluated for their pharmacokinetic parameters. The entrapment efficiency of these microspheres was between 58.6% and 90.56%. The obtained microspheres showed good flow properties, which were evaluated in terms of angle of repose (15.29–26.32), bulk and tapped densities (0.37–0.53 and 0.43–0.64, respectively), Carr indices and Hausner ratio (12.94–19.14% and 1.14–1.23, respectively). No drug release was observed in the simulated gastric medium up to 2 hours; however, a change in pH from 1.2 to 6.8 increased the drug release. At pH 7.4, formulations with EUDRAGIT RS 100 showed a steady drug release. The microsphere formulation TMRS-3 (i.e., microspheres containing 2-mg telmisartan) gave the highest Cmax value (6.8641 μg/mL) at 6 hours, which was three times higher than Cmax for telmisartan oral suspension (TOS). Correspondingly, the area under the curve for TMRS-3 was 8.5 times higher than TOS. Particle size and drug release depended on the nature and content of polymer used. The drug release mechanism of the TMRS-3 formulation can be explained using the Higuchi model. The controlled release of drug from TMRS-3 also provides for higher plasma drug content and improved bioavailability.
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15
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Zhang G, Tang Y, Shang J, Wang Z, Yu H, Du W, Fu Q. Flow-injection chemiluminescence method to detect a β2 adrenergic agonist. LUMINESCENCE 2014; 30:102-9. [PMID: 24830367 DOI: 10.1002/bio.2698] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/27/2014] [Accepted: 04/03/2014] [Indexed: 11/09/2022]
Abstract
A new method for the detection of β2 adrenergic agonists was developed based on the chemiluminescence (CL) reaction of β2 adrenergic agonist with potassium ferricyanide-luminol CL. The effect of β2 adrenergic agonists including isoprenaline hydrochloride, salbutamol sulfate, terbutaline sulfate and ractopamine on the CL intensity of potassium ferricyanide-luminol was discovered. Detection of the β2 adrenergic agonist was carried out in a flow system. Using uniform design experimentation, the influence factors of CL were optimized. The optimal experimental conditions were 1 mmol/L of potassium ferricyanide, 10 µmol/L of luminol, 1.2 mmol/L of sodium hydroxide, a flow speed of 2.6 mL/min and a distance of 1.2 cm from 'Y2 ' to the flow cell. The linear ranges and limit of detection were 10-100 and 5 ng/mL for isoprenaline hydrochloride, 20-100 and 5 ng/mL for salbutamol sulfate, 8-200 and 1 ng/mL for terbutaline sulfate, 20-100 and 4 ng/mL for ractopamine, respectively. The proposed method allowed 200 injections/h with excellent repeatability and precision. It was successfully applied to the determination of three β2 adrenergic agonists in commercial pharmaceutical formulations with recoveries in the range of 96.8-98.5%. The possible CL reaction mechanism of potassium ferricyanide-luminol-β2 adrenergic agonist was discussed from the UV/vis spectra.
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Affiliation(s)
- Guangbin Zhang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China; Institute of Analytical Science, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China
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Maltas E. Binding interactions of niclosamide with serum proteins. J Food Drug Anal 2014; 22:549-555. [PMID: 28911473 PMCID: PMC7129377 DOI: 10.1016/j.jfda.2014.03.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 03/27/2014] [Accepted: 03/28/2014] [Indexed: 11/29/2022] Open
Abstract
A study of the binding of niclosamide (NC) to serum proteins such as human serum albumin, hemoglobin, and globulin was carried out using fluorescence and UV-visible spectroscopy. Interactions between NC and these proteins were estimated by Stern-Volmer and van't Hoff equations. The binding constants and the thermodynamic parameters, ΔH, ΔS, and ΔG at different temperatures were also determined by using these equations. Data showed that NC may exhibit a static quenching mechanism with all proteins. The thermodynamic parameters were calculated. Data showed that van der Waals interactions and hydrogen bonds are the main forces for human serum albumin and hemoglobin. Globulin, however, bound to NC via hydrophobic interaction. The spectral changes of synchronous fluorescence suggested that both the microenvironment of NC and the conformation of the proteins changed in relation to their concentrations during NC's binding.
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Affiliation(s)
- Esra Maltas
- Selcuk University, Faculty of Science, Department of Chemistry, Konya 42031, Selcuklu, Turkey.
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