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Smajdor J, Paczosa-Bator B, Piech R. Advances on Hormones and Steroids Determination: A Review of Voltammetric Methods since 2000. MEMBRANES 2022; 12:1225. [PMID: 36557132 PMCID: PMC9782681 DOI: 10.3390/membranes12121225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
This article presents advances in the electrochemical determination of hormones and steroids since 2000. A wide spectrum of techniques and working electrodes have been involved in the reported measurements in order to obtain the lowest possible limits of detection. The voltammetric and polarographic techniques, due to their sensitivity and easiness, could be used as alternatives to other, more complicated, analytical assays. Still, growing interest in designing a new construction of the working electrodes enables us to prepare new measurement procedures and obtain lower limits of detection. A brief description of the measured compounds has been presented, along with a comparison of the obtained results.
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Functional Nanomaterials Based Opto-Electrochemical Sensors for the Detection of Gonadal Steroid Hormones. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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3
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Huml L, Tauchen J, Rimpelová S, Holubová B, Lapčík O, Jurášek M. Advances in the Determination of Anabolic-Androgenic Steroids: From Standard Practices to Tailor-Designed Multidisciplinary Approaches. SENSORS (BASEL, SWITZERLAND) 2021; 22:4. [PMID: 35009549 PMCID: PMC8747103 DOI: 10.3390/s22010004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/06/2021] [Accepted: 12/14/2021] [Indexed: 12/12/2022]
Abstract
Anabolic-androgenic steroids (AASs), a group of compounds frequently misused by athletes and, unfortunately, also by the general population, have lately attracted global attention; thus, significant demands for more precise, facile, and rapid AAS detection have arisen. The standard methods ordinarily used for AAS determination include liquid and gas chromatography coupled with mass spectrometry. However, good knowledge of steroid metabolism, pretreatment of samples (such as derivatization), and well-trained operators of the instruments are required, making this procedure expensive, complicated, and not routinely applicable. In the drive to meet current AAS detection demands, the scientific focus has shifted to developing novel, tailor-made approaches leading to time- and cost-effective, routine, and field-portable methods for AAS determination in various matrices, such as biological fluids, food supplements, meat, water, or other environmental components. Therefore, herein, we present a comprehensive review article covering recent advances in AAS determination, with a strong emphasis on the increasingly important role of chemically designed artificial sensors, biosensors, and antibody- and fluorescence-based methods.
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Affiliation(s)
- Lukáš Huml
- Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, 16628 Prague, Czech Republic; (O.L.); (M.J.)
| | - Jan Tauchen
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, 16500 Prague, Czech Republic;
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, 16628 Prague, Czech Republic;
| | - Barbora Holubová
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, 16628 Prague, Czech Republic;
| | - Oldřich Lapčík
- Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, 16628 Prague, Czech Republic; (O.L.); (M.J.)
| | - Michal Jurášek
- Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, 16628 Prague, Czech Republic; (O.L.); (M.J.)
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Kaya SI, Yıldırım S, Cetinkaya A, Erkmen C, Uslu B, Ozkan SA. Nanomaterial-based electroanalytical sensors for the selected prohibited anabolic agents, hormones and metabolic modulators and their sensitive assays. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Sanli S, Moulahoum H, Ghorbanizamani F, Gumus ZP, Timur S. On‐Site Testosterone Biosensing for Doping Detection: Electrochemical Immunosensing via Functionalized Magnetic Nanoparticles and Screen‐Printed Electrodes. ChemistrySelect 2020. [DOI: 10.1002/slct.202004204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Serdar Sanli
- Department of Biochemistry Faculty of Science Ege University 35100- Bornova/Izmir Turkey
| | - Hichem Moulahoum
- Department of Biochemistry Faculty of Science Ege University 35100- Bornova/Izmir Turkey
| | - Faezeh Ghorbanizamani
- Department of Biochemistry Faculty of Science Ege University 35100- Bornova/Izmir Turkey
| | - Zinar Pinar Gumus
- Central Research Test and Analysis Laboratory Application and Research Center Ege University 35100- Bornova/Izmir Turkey
| | - Suna Timur
- Department of Biochemistry Faculty of Science Ege University 35100- Bornova/Izmir Turkey
- Central Research Test and Analysis Laboratory Application and Research Center Ege University 35100- Bornova/Izmir Turkey
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Bulut U, Sanli S, Cevher SC, Cirpan A, Donmez S, Timur S. A biosensor platform based on amine functionalized conjugated benzenediamine‐benzodithiophene polymer for testosterone analysis. J Appl Polym Sci 2020. [DOI: 10.1002/app.49332] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Umut Bulut
- Faculty of Pharmacy, Analytical Chemistry DepartmentAcıbadem Mehmet Ali Aydinlar University İstanbul Turkey
| | - Serdar Sanli
- Faculty of Science, Biochemistry DepartmentEge University Izmir Turkey
| | - Sevki Can Cevher
- Chemistry DepartmentMiddle East Technical University Ankara Turkey
| | - Ali Cirpan
- Chemistry DepartmentMiddle East Technical University Ankara Turkey
| | - Sude Donmez
- Faculty of Science, Biochemistry DepartmentEge University Izmir Turkey
| | - Suna Timur
- Faculty of Science, Biochemistry DepartmentEge University Izmir Turkey
- Central Research Test and Analysis Laboratory Application and Research CenterEge University Izmir Turkey
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Mikuła E, Silva CE, Kopera E, Zdanowski K, Radecki J, Radecka H. Highly sensitive electrochemical biosensor based on redox - active monolayer for detection of anti-hemagglutinin antibodies against swine-origin influenza virus H1N1 in sera of vaccinated mice. BMC Vet Res 2018; 14:328. [PMID: 30400888 PMCID: PMC6218974 DOI: 10.1186/s12917-018-1668-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 10/23/2018] [Indexed: 12/18/2022] Open
Abstract
Background In this work, we report an electrochemical biosensor for the detection of anti-hemagglutinin antibodies against the swine virus H1N1 present in mice sera immunized with mixture of His6-H1 HA in monomeric and oligomeric form. The oriented immobilization of the recombinant His-tagged hemagglutinin (His6-H1 HA) consists of: (i) formation of a mixed layer of 4-mercaptobutanol (MBT) and the thiol derivative of dipyrromethene (DPM); (ii) complexation of Cu (II) by DPM; (iii) immobilization of His6-H1 HA via coordination bonds between Cu (II) sites from DPM–Cu (II) complex and imidazole nitrogen atoms of a histidine tag; (iv) filling free spaces with bovine serum albumin. The interactions between recombinant His6- H1 HA covalently attached to the electrode surface and the anti-hemagglutinin H1 antibodies present in mice sera were explored with Osteryoung square-wave voltammetry. Results This analytical device was able to detect the antibodies present in vaccinated mice sera diluted from 1 × 109 to 1 × 108 fold. Conclusions The unprecedented sensitivity of described biosensor is much better than widely use ELISA test and other analytical methods for determination of antibodies against the influenza A viruses. It has been proved that redox active DPM-Cu (II) monolayer is a universal platform suitable for stable and oriented immobilization of any His-tagged sensing elements. Thus, this universal layer could be a base of numerous analytical devices suitable for detection of antibodies against different viruses.
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Affiliation(s)
- Edyta Mikuła
- Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland
| | - Cristiane Erdmann Silva
- Universidade Estadual de Ponta Grossa - UEPG, Setor de Ciências Exatas e da Terra, Departamento de Química, Av. Carlos Cavalcanti, 4748, CEP 84030-900, Ponta Grossa/ PR, Brazil
| | - Edyta Kopera
- Institute of Biochemistry and Biophysics of Polish Academy of Sciences, Pawińskiego 5a, 02-106, Warsaw, Poland.,Research and Development Center, Olimp Laboratories, Pustynia, Dębica, Poland
| | - Konrad Zdanowski
- Institute of Biochemistry and Biophysics of Polish Academy of Sciences, Pawińskiego 5a, 02-106, Warsaw, Poland.,Institute of Chemistry, University of Natural Sciences and Humanities, 3 Maja 54, 08-110, Siedlce, Poland
| | - Jerzy Radecki
- Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland
| | - Hanna Radecka
- Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland.
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Brainina K, Stozhko N, Bukharinova M, Vikulova E. Nanomaterials: Electrochemical Properties and Application in Sensors. PHYSICAL SCIENCES REVIEWS 2018. [DOI: 10.1515/psr-2018-8050] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The unique properties of nanoparticles make them an extremely valuable modifying material, being used in electrochemical sensors. The features of nanoparticles affect the kinetics and thermodynamics of electrode processes of both nanoparticles and redox reactions occurring on their surface. The paper describes theoretical background and experimental studies of these processes. During the transition from macro- to micro- and nanostructures, the analytical characteristics of sensors modify. These features of metal nanoparticles are related to their size and energy effects, which affects the analytical characteristics of developed sensors. Modification of the macroelectrode with nanoparticles and other nanomaterials reduces the detection limit and improves the degree of sensitivity and selectivity of measurements. The use of nanoparticles as transducers, catalytic constituents, parts of electrochemical sensors for antioxidant detection, adsorbents, analyte transporters, and labels in electrochemical immunosensors and signal-generating elements is described.
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Du X, Zhang X, Jiang C, Zhang W, Yang L. The Trace Detection of Nitrite Ions Using Neutral Red Functionalized SH-β-Cyclodextrin @Au Nanoparticles. SENSORS (BASEL, SWITZERLAND) 2018; 18:E681. [PMID: 29495331 PMCID: PMC5877208 DOI: 10.3390/s18030681] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/09/2018] [Accepted: 02/21/2018] [Indexed: 12/25/2022]
Abstract
A novel fluorescence sensor of NR-β-CD@AuNPs was prepared for the trace detection of nitrite in quantities as low as 4.25 × 10-3 μg∙mL-1 in an aqueous medium. The fluorescence was due to the host-guest inclusion complexes between neutral red (NR) molecules and gold nanoparticles (AuNPs), which were modified by per-6-mercapto-beta-cyclodextrins (SH-β-CDs) as both a reducing agent and a stabilizer under microwave radiation. The color of the NR-β-CD@AuNPs changed in the presence of nitrite ions. A sensor was applied to the determination of trace nitrites in environmental water samples with satisfactory results.
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Affiliation(s)
- Xiaoyang Du
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
| | - Xiaoxia Zhang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
| | - Chunlai Jiang
- The Atmospheric Environment Department, Chinese Academy for Environmental Planning, Beijing 100012, China.
| | - Weilu Zhang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
| | - Lizhu Yang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
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Slepchenko GB, Gindullina TM, Nekhoroshev SV. Capabilities of the electrochemical methods in the determination of narcotic and psychotropic drugs in forensic chemistry materials. JOURNAL OF ANALYTICAL CHEMISTRY 2017. [DOI: 10.1134/s1061934817070127] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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The application of graphene for in vitro and in vivo electrochemical biosensing. Biosens Bioelectron 2017; 89:224-233. [DOI: 10.1016/j.bios.2016.03.026] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/22/2016] [Accepted: 03/13/2016] [Indexed: 01/22/2023]
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12
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Mistry KK, Layek K, Mahapatra A, RoyChaudhuri C, Saha H. A review on amperometric-type immunosensors based on screen-printed electrodes. Analyst 2015; 139:2289-311. [PMID: 24678518 DOI: 10.1039/c3an02050a] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this brief review, we summarize the recent research activities involved in the development of amperometric-type immunosensors based on screen-printed electrodes (SPEs). We focus on the underlying principle involved in these types of sensors, their fabrication and electrode surface modification. We also discuss the various factors involved in the designing of such immunosensors and how they affect their performances. Finally we provide an insight into the drawbacks associated with these SPEs.
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Affiliation(s)
- Kalyan Kumar Mistry
- CSIR-Central Mechanical Engineering Research Institute, M. G. Avenue, Durgapur-713209, India.
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Electrochemical immunosensor for botulinum neurotoxin type-E using covalently ordered graphene nanosheets modified electrodes and gold nanoparticles-enzyme conjugate. Biosens Bioelectron 2015; 69:249-56. [DOI: 10.1016/j.bios.2015.02.039] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 02/13/2015] [Accepted: 02/25/2015] [Indexed: 01/19/2023]
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Doménech-Carbó A, González-Béjar M, Pérez-Prieto J. Application of the Generalized Molar-Ratio Method to the Determination of the Stoichiometry and Apparent Binding Constant of Nanoparticle-Organic Capping Systems. ELECTROANAL 2015. [DOI: 10.1002/elan.201500232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Levent A, Altun A, Taş S, Yardım Y, Şentürk Z. Voltammetric Behavior of Testosterone on Bismuth Film Electrode: Highly Sensitive Determination in Pharmaceuticals and Human Urine by Square‐Wave Adsorptive Stripping Voltammetry. ELECTROANAL 2015; 27:1219-1228. [DOI: https:/doi.org/10.1002/elan.201400627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Accepted: 12/05/2014] [Indexed: 07/01/2024]
Abstract
AbstractIn this paper, an electrochemical application of bismuth‐film electrode (BiFE) fabricated via ex‐situ electrodeposition onto a glassy carbon electrode for testosterone determination was investigated in aqueous and aqueous/surfactant solutions. In cyclic voltammetry, the compound showed one irreversible and adsorption‐controlled reduction peak. The BiFE revealed good linear response in the examined concentration range of 1 to 45 nmol L−1 testosterone in BrittonRobinson buffer, pH 5.0 containing 3 mmol L−1 cetyltrimethylammonium bromide. The limit of detection was 0.3 nmol L−1 (0.09 ng mL−1). Finally, the BiFE was satisfactorily applied for quantitation of testosterone in both pharmaceutical (oil‐based ampoule) and biological (human urine) samples.
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Kong N, Song S, Peng J, Liu L, Kuang H, Xu C. Sensitive, fast, and specific immunoassays for methyltestosterone detection. SENSORS 2015; 15:10059-73. [PMID: 25938198 PMCID: PMC4481955 DOI: 10.3390/s150510059] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 03/21/2015] [Accepted: 04/27/2015] [Indexed: 11/20/2022]
Abstract
An indirect competitive enzyme-linked immunosorbent assay (icELISA) and an immunochromatographic strip assay using a highly specific monoclonal antibody, were developed to detect methyltestosterone (MT) residues in animal feed. The optimized icELISA had a half-inhibition concentration value of 0.26 ng/mL and a limit of detection value of 0.045 ng/mL. There was no cross-reactivity with eight analogues, revealing high specificity for MT. Based on icELISA results, the recovery rate of MT in animal feed was 82.4%–100.6%. The results were in accordance with those obtained by gas chromatography-mass spectrometry. The developed immunochromatographic strip assay, as the first report for MT detection, had a visual cut-off value of 1 ng/mL in PBS, 2.5 ng/g in fish feed, and 2.5 ng/g in pig feed. Therefore, these immunoassays are useful and fast tools for MT residue detection in animal feed.
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Affiliation(s)
- Na Kong
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Shanshan Song
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Juan Peng
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Liqiang Liu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Hua Kuang
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
| | - Chuanlai Xu
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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Voltammetric Behavior of Testosterone on Bismuth Film Electrode: Highly Sensitive Determination in Pharmaceuticals and Human Urine by Square-Wave Adsorptive Stripping Voltammetry. ELECTROANAL 2015. [DOI: 10.1002/elan.201400627] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
Affinity-based biosensors (ABBs) have started to be considered in sport medicine and doping control analysis because they are cheap, easy to use and sufficiently selective analytical devices, characterized by a reversible interaction with the analyte under investigation allowing the use of the same sensor for multiple analyses. In this review we describe the main categories of substances reported in the World Anti-Doping Agency Prohibited List and how ABBs may contribute to their detection. Although several ABBs proposed in the last few years display limit of detections that are in principle matching the World Anti-Doping Agency requirements, their application in the framework of 'traditional' antidoping tests seems quite unlikely, mainly because of the still insufficient selectivity especially in the case of 'pseudo-endogenous' compounds, and on the lack of complete information regarding potential matrix effects in real samples and following their routine use. At the same time, ABBs could contribute to fill a significant information gap concerning complementary evidence that can be obtained from their use 'on the spot', as well as to preselect a risk population of individuals to be targeted for a full antidoping test; while in sport medicine they could contribute to obtaining analytical information of physiological relevance from the measurement of specific parameters or markers before, during and after physical exercise.
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Tang J, Zhang L, Liu Y, Zhou J, Han G, Tang W. Gold Nanoparticles-β-Cyclodextrin-Chitosan-Graphene Modified Glassy Carbon Electrode for Ultrasensitive Detection of Dopamine and Uric Acid. ELECTROANAL 2014. [DOI: 10.1002/elan.201400272] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Levent A, Altun A, Yardım Y, Şentürk Z. Sensitive voltammetric determination of testosterone in pharmaceuticals and human urine using a glassy carbon electrode in the presence of cationic surfactant. Electrochim Acta 2014; 128:54-60. [DOI: https:/doi.org/10.1016/j.electacta.2013.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2024]
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Levent A, Altun A, Yardım Y, Şentürk Z. Sensitive voltammetric determination of testosterone in pharmaceuticals and human urine using a glassy carbon electrode in the presence of cationic surfactant. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.10.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Development of electrochemical immunosensors towards point of care diagnostics. Biosens Bioelectron 2013; 47:1-11. [DOI: 10.1016/j.bios.2013.02.045] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/27/2013] [Accepted: 02/28/2013] [Indexed: 12/21/2022]
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Jarocka U, Radecka H, Malinowski T, Michalczuk L, Radecki J. Detection of Prunus Necrotic Ringspot Virus in Plant Extracts with Impedimetric Immunosensor based on Glassy Carbon Electrode. ELECTROANAL 2013. [DOI: 10.1002/elan.201200470] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Ricci F, Adornetto G, Palleschi G. A review of experimental aspects of electrochemical immunosensors. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.06.033] [Citation(s) in RCA: 225] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tian X, Cheng C, Yuan H, Du J, Xiao D, Xie S, Choi MM. Simultaneous determination of l-ascorbic acid, dopamine and uric acid with gold nanoparticles–β-cyclodextrin–graphene-modified electrode by square wave voltammetry. Talanta 2012; 93:79-85. [DOI: 10.1016/j.talanta.2012.01.047] [Citation(s) in RCA: 195] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2011] [Revised: 01/20/2012] [Accepted: 01/29/2012] [Indexed: 11/25/2022]
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Moreno-Guzmán M, González-Cortés A, Yáñez-Sedeño P, Pingarrón JM. Multiplexed Ultrasensitive Determination of Adrenocorticotropin and Cortisol Hormones at a Dual Electrochemical Immunosensor. ELECTROANAL 2012. [DOI: 10.1002/elan.201200070] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Affiliation(s)
- Danielle W. Kimmel
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, VU Station B 351822, Nashville, TN 37235-1822
| | - Gabriel LeBlanc
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, VU Station B 351822, Nashville, TN 37235-1822
| | - Mika E. Meschievitz
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, VU Station B 351822, Nashville, TN 37235-1822
| | - David E. Cliffel
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, VU Station B 351822, Nashville, TN 37235-1822
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Rau S, Gauglitz G. Reflectometric interference spectroscopy (RIfS) as a new tool to measure in the complex matrix milk at low analyte concentration. Anal Bioanal Chem 2011; 402:529-36. [PMID: 22009049 DOI: 10.1007/s00216-011-5470-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 09/27/2011] [Accepted: 10/03/2011] [Indexed: 10/16/2022]
Abstract
Measurements in complex matrices like milk still present a challenge in biosensor development. This is especially important when using a label-free detection method or when measuring low analyte concentrations. The direct optical method reflectometric interference spectroscopy (RIfS) was used for investigating matrix effects in immunoassay development. Furthermore, approaches to reduce these effects have been established. As a model system, the hormone testosterone has been chosen because this immunoassay has been well characterized in buffer. In a first step, the immunoassay for the detection of testosterone in buffer was improved beyond former published results. Therefore, the sensor surface was optimized, resulting in a fivefold lower limit of detection (70.2 ng L(-1)) and limit of quantification (130.0 ng L(-1)). Additionally, the assay time could be reduced to 15 min. Consequently, we used this improved assay to investigate matrix effects of whole pasteurized bovine milk. To minimize these effects, the surface chemistry was adapted and a suitable evaluation method was established, reducing the effects of Tyndall scattering and nonspecific binding to the sensor surface. These improvements allow for very reliable quantitative measurements in milk. The assay developed required no sample pretreatment and allowed for the regeneration of the sensor surface so that calibration could be performed on one chip. The calibration in milk (3.5% fat) resulted in a limit of detection of 94.4 ng L(-1) and a limit of quantification of 229.3 ng L(-1). Furthermore, recovery rates between 70% and 120% could be obtained. Thus, for the first time, an analyte in the matrix milk was successfully quantified with RIfS at low concentrations.
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Affiliation(s)
- Sabrina Rau
- Institute of Physical and Theoretical Chemistry (IPTC), Eberhard Karls University of Tübingen, Tübingen, Germany.
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Campuzano S, Wang J. Nanobioelectroanalysis Based on Carbon/Inorganic Hybrid Nanoarchitectures. ELECTROANAL 2011. [DOI: 10.1002/elan.201100186] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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