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Dinu A, Apetrei C. A Review of Sensors and Biosensors Modified with Conducting Polymers and Molecularly Imprinted Polymers Used in Electrochemical Detection of Amino Acids: Phenylalanine, Tyrosine, and Tryptophan. Int J Mol Sci 2022; 23:1218. [PMID: 35163145 PMCID: PMC8835779 DOI: 10.3390/ijms23031218] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 02/07/2023] Open
Abstract
Recently, the studies on developing sensors and biosensors-with an obvious interdisciplinary character-have drawn the attention of many researchers specializing in various fundamental, but also complex domains such as chemistry, biochemistry, physics, biophysics, biology, bio-pharma-medicine, and bioengineering. Along these lines, the present paper is structured into three parts, and is aimed at synthesizing the most relevant studies on the construction and functioning of versatile devices, of electrochemical sensors and biosensors, respectively. The first part presents examples of the most representative scientific research focusing on the role and the importance of the phenylalanine, tyrosine, and tryptophan amino acids, selected depending on their chemical structure and their impact on the central nervous system. The second part is dedicated to presenting and exemplifying conductor polymers and molecularly imprinted polymers used as sensitive materials in achieving electrochemical sensors and biosensors. The last part of the review analyzes the sensors and biosensors developed so far to detect amino acids with the aid of conductor polymers and molecularly imprinted polymers from the point of view of the performances obtained, with emphasis on the detection methods, on the electrochemical reactions that take place upon detection, and on the electroanalytical performances. The present study was carried out with a view to highlighting, for the benefit of specialists in medicine and pharmacy, the possibility of achieving and purchasing efficient devices that might be used in the quality control of medicines, as well as in studying and monitoring diseases associated with these amino acids.
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Affiliation(s)
| | - Constantin Apetrei
- Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, “Dunărea de Jos” University of Galati, RO-800008 Galati, Romania;
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Mehmandoust M, Erk N, Alizadeh M, Salmanpour S. Voltammetric carbon nanotubes based sensor for determination of tryptophan in the milk sample. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2021. [DOI: 10.1007/s11694-021-01100-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Development of a Novel Sensor Based on Polypyrrole Doped with Potassium Hexacyanoferrate (II) for Detection of L-Tryptophan in Pharmaceutics. INVENTIONS 2021. [DOI: 10.3390/inventions6030056] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study describes the development of a new sensor with applicability in the determination and quantification of yjr essential amino acid (AA) L-tryptophan (L-TRP) from pharmaceutical products. The proposed sensor is based on a carbon screen-printed electrode (SPCE) modified with the conductor polymer polypyrrole (PPy) doped with potassium hexacyanoferrate (II) (FeCN). For the modification of the SPCE with the PPy doped with FeCN, the chronoamperometry (CA) method was used. For the study of the electrochemical behavior and the sensitive properties of the sensor when detecting L-TRP, the cyclic voltammetry (CV) method was used. This developed electrode has shown a high sensibility, a low detection limit (LOD) of up to 1.05 × 10−7 M, a quantification limit (LOQ) equal to 3.51 × 10−7 M and a wide linearity range between 3.3 × 10−7 M and 1.06 × 10−5 M. The analytical performances of the device were studied for the detection of AA L-TRP from pharmaceutical products, obtaining excellent results. The validation of the electroanalytical method was performed by using the standard method with good results.
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Step potential as a diagnostic tool in square-wave voltammetry of quasi-reversible electrochemical processes. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134997] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Cioates Negut C, Stefan‐van Staden R, Harja F, Staden JF. Pattern Recognition of Amino Acids in Wines. ELECTROANAL 2019. [DOI: 10.1002/elan.201900497] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Catalina Cioates Negut
- Laboratory of Electrochemistry and PATLABNational Institute of Research for Electrochemistry and Condensed Matter Bucharest Romania
| | - Raluca‐Ioana Stefan‐van Staden
- Laboratory of Electrochemistry and PATLABNational Institute of Research for Electrochemistry and Condensed Matter Bucharest Romania
| | - Florian Harja
- Faculty of Applied Chemistry and Materials ScienceUniversity Politehnica Bucharest Bucharest Romania
| | - Jacobus Frederick Staden
- Laboratory of Electrochemistry and PATLABNational Institute of Research for Electrochemistry and Condensed Matter Bucharest Romania
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Jalalvand AR, Roushani M, Goicoechea HC, Rutledge DN, Gu HW. MATLAB in electrochemistry: A review. Talanta 2019; 194:205-225. [DOI: 10.1016/j.talanta.2018.10.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/07/2018] [Accepted: 10/09/2018] [Indexed: 10/28/2022]
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Ultrasensitive and reusable electrochemical aptasensor for detection of tryptophan using of [Fe(bpy) 3](p-CH 3C 6H 4SO 2) 2 as an electroactive indicator. J Pharm Biomed Anal 2018; 163:180-187. [PMID: 30316063 DOI: 10.1016/j.jpba.2018.10.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Revised: 09/24/2018] [Accepted: 10/02/2018] [Indexed: 02/01/2023]
Abstract
In this paper, we report the application of a reusable electrochemical aptasensor for detection of tryptophan by using [Fe(bpy)3](p-CH3C6H4SO2)2 as an electroactive indicator and based on the target-compelled aptamer displacement. The aptasensor fabricated by self-assembling the thiolated probe on the surface of graphite screen-printed electrode modified with gold nanoparticles/multiwalled carbon nanotubes and chitosan nanocomposite (AuNPs/MWCNTs-Chit/SPE). Afterward, Trp aptamer (Apt) immobilized on the modified electrode surface through hybridization. In the absence of Trp, a sharp peak of [Fe(bpy)3](p-CH3C6H4 SO2)2 can be observed in differential pulse voltammetry (DPV) study. The introduction of Trp led to the formation of aptamer-Trp complex and dissociation of the aptamer from the DNA-Apt duplex on the electrode surface into the solution and decreases the peak current intensity of electroactive indicator. This is because, [Fe(bpy)3](p-CH3C6H4SO2)2 tends to bind to the two strands DNA. Therefore, the peak current of [Fe(bpy)3](p-CH3C6H4 SO2)2 linearly decreased with increasing the concentration of Trp over a range of 3.0 nM- 100 μM. The detection limit (3 σ) was 1.0 nM. In addition, we examined the selectivity of the constructed biosensor for tyrosine, histidine, arginine, lysine, valine and methionine that belonged to the amino acid family. The obtained results showed that the fabricated sensor had a good selectivity for Trp against the other examined amino acids. Also, the potential applicability of the aptasensor was investigated by detecting the Trp in a complex media such as human blood plasma spiked with Trp.
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Das C, Pakhira B, Rheingold AL, Kumar Chattopadhyay S. Turn on ESIPT based chemosensor for histidine: Application in urine analysis and live cell imaging. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.06.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hashkavayi AB, Raoof JB, Ojani R. Preparation of Epirubicin Aptasensor Using Curcumin as Hybridization Indicator: Competitive Binding Assay between Complementary Strand of Aptamer and Epirubicin. ELECTROANAL 2017. [DOI: 10.1002/elan.201700645] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ayemeh Bagheri Hashkavayi
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry; University of Mazandaran; Babolsar IranTel.: +98 11 353 02392Fax: +98 11 353 02350
| | - Jahan Bakhsh Raoof
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry; University of Mazandaran; Babolsar IranTel.: +98 11 353 02392Fax: +98 11 353 02350
| | - Reza Ojani
- Electroanalytical Chemistry Research Laboratory, Department of Analytical Chemistry, Faculty of Chemistry; University of Mazandaran; Babolsar IranTel.: +98 11 353 02392Fax: +98 11 353 02350
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Chen Z, He Q, Zhao M, Lin C, Luo F, Lin Z, Chen G. A fluorometric histidine biosensor based on the use of a quencher-labeled Cu(II)-dependent DNAzyme. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2425-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Qiao Y, Chen B, Yang Y, Wang X, Xu Y, Li H. Rational design of a highly selective fluorescent sensor forl-histidine detection in aqueous solution. Dalton Trans 2016; 45:1310-4. [DOI: 10.1039/c5dt04214c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A new highly selective “turn-on” fluorescent sensor (H3-Ni2+) forl-histidine was designed and synthesized using computational studies in combination with experimental research.
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Affiliation(s)
- Yan Qiao
- Shanghai Key Laboratory of New Drug Design
- State Key Laboratory of Bioreactor Engineering
- School of Pharmacy
- East China University of Science & Technology
- Shanghai 200237
| | - Bin Chen
- Shanghai Key Laboratory of New Drug Design
- State Key Laboratory of Bioreactor Engineering
- School of Pharmacy
- East China University of Science & Technology
- Shanghai 200237
| | - Yangyang Yang
- Shanghai Key Laboratory of New Drug Design
- State Key Laboratory of Bioreactor Engineering
- School of Pharmacy
- East China University of Science & Technology
- Shanghai 200237
| | - Xin Wang
- Shanghai Key Laboratory of New Drug Design
- State Key Laboratory of Bioreactor Engineering
- School of Pharmacy
- East China University of Science & Technology
- Shanghai 200237
| | - Yufang Xu
- Shanghai Key Laboratory of New Drug Design
- State Key Laboratory of Bioreactor Engineering
- School of Pharmacy
- East China University of Science & Technology
- Shanghai 200237
| | - Honglin Li
- Shanghai Key Laboratory of New Drug Design
- State Key Laboratory of Bioreactor Engineering
- School of Pharmacy
- East China University of Science & Technology
- Shanghai 200237
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A Highly Sensitive Sensor Based on Reduced Graphene Oxide, Carbon Nanotube and a Co(II) Complex Modified Carbon Paste Electrode: Simultaneous Determination of Isoprenaline, Captopril and Tryptophan. ELECTROANAL 2015. [DOI: 10.1002/elan.201500236] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Majidi MR, Salimi A, Alipour E. Development of Voltammetric Sensor for Determination of Tryptophan Using MWCNTs-modified Sol-gel Electrode. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300248] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Jastrzębska A, Piasta A, Filipiak-Szok A, Szłyk E. Optimization of Capillary Isotachophoretic Method for Histidine Determination in Protein Matrices. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.762582] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Qiu H, Luo C, Sun M, Lu F, Fan L, Li X. Determination of l-tryptophan based on graphene oxide–magnetite-molecularly imprinted polymers and chemiluminescence. Talanta 2012; 98:226-30. [DOI: 10.1016/j.talanta.2012.06.078] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 06/25/2012] [Accepted: 06/27/2012] [Indexed: 10/28/2022]
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Pauliukaite R, Pinto EM, Amine A, Brett CMA. Voltammetric Sensing of Amino Acids in the Presence of Cu(II) in Acidic and Alkaline Solutions. ELECTROANAL 2012. [DOI: 10.1002/elan.201100733] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Prabhu P, Babu RS, Narayanan SS. Electrocatalytic oxidation of l-tryptophan using copper hexacyanoferrate film modified gold nanoparticle graphite-wax electrode. Colloids Surf B Biointerfaces 2011; 87:103-8. [DOI: 10.1016/j.colsurfb.2011.05.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Revised: 04/30/2011] [Accepted: 05/03/2011] [Indexed: 11/25/2022]
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Preparation of voltammetric biosensor for tryptophan using multi-walled carbon nanotubes. KOREAN J CHEM ENG 2011. [DOI: 10.1007/s11814-011-0066-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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19
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Carbon paste electrode modified with a binuclear manganese complex as a sensitive voltammetric sensor for tryptophan. Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0619-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ensafi AA, Karimi-Maleh H, Mallakpour S. N-(3,4-Dihydroxyphenethyl)-3,5-dinitrobenzamide-Modified Multiwall Carbon Nanotubes Paste Electrode as a Novel Sensor for Simultaneous Determination of Penicillamine, Uric acid, and Tryptophan. ELECTROANAL 2011. [DOI: 10.1002/elan.201000741] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Givianrad MH, Saber-Tehrani M, Aberoomand-Azar P, Mohagheghian M. H-point standard additions method for simultaneous determination of sulfamethoxazole and trimethoprim in pharmaceutical formulations and biological fluids with simultaneous addition of two analytes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:1196-1200. [PMID: 21256795 DOI: 10.1016/j.saa.2010.12.082] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 12/25/2010] [Accepted: 12/28/2010] [Indexed: 05/30/2023]
Abstract
The applicability of H-point standard additions method (HPSAM) to the resolving of overlapping spectra corresponding to the sulfamethoxazole and trimethoprim is verified by UV-vis spectrophotometry. The results show that the H-point standard additions method with simultaneous addition of both analytes is suitable for the simultaneous determination of sulfamethoxazole and trimethoprim in aqueous media. The results of applying the H-point standard additions method showed that the two drugs could be determined simultaneously with the concentration ratios of sulfamethoxazole to trimethoprim varying from 1:18 to 16:1 in the mixed samples. Also, the limits of detections were 0.58 and 0.37 μmol L(-1) for sulfamethoxazole and trimethoprim, respectively. In addition the means of the calculated RSD (%) were 1.63 and 2.01 for SMX and TMP, respectively in synthetic mixtures. The proposed method has been successfully applied to the simultaneous determination of sulfamethoxazole and trimethoprim in some synthetic, pharmaceutical formulation and biological fluid samples.
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Affiliation(s)
- M H Givianrad
- Islamic Azad University, Science and Research Branch, Department of Chemistry, Tehran, Iran.
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Chatraei F, Zare HR. Electrodeposited acetaminophen as a bifunctional electrocatalyst for simultaneous determination of ascorbic acid, glutathione, adrenaline and tryptophan. Analyst 2011; 136:4595-602. [DOI: 10.1039/c1an15346c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Huang Y, Xiong S, Liu G, Zhao R. A rapid and highly selective colorimetric method for direct detection of tryptophan in proteins via DMSO acceleration. Chem Commun (Camb) 2011; 47:8319-21. [DOI: 10.1039/c1cc12303c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Safavi A, Momeni S. Electrocatalytic Oxidation of Tryptophan at Gold Nanoparticle-Modified Carbon Ionic Liquid Electrode. ELECTROANAL 2010. [DOI: 10.1002/elan.201000279] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Mazloum-Ardakani M, Beitollahi H, Taleat Z, Naeimi H, Taghavinia N. Selective voltammetric determination of d-penicillamine in the presence of tryptophan at a modified carbon paste electrode incorporating TiO2 nanoparticles and quinizarine. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.02.034] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ahmadi F, Bakhshandeh-Saraskanrood F. Simultaneous Determination of Ultra Trace of Uranium and Cadmium by Adsorptive Cathodic Stripping Voltammetry Using H-Point Standard Addition Method. ELECTROANAL 2010. [DOI: 10.1002/elan.200900520] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Electrochemical investigation of tryptophan at gold nanoparticles modified electrode in the presence of sodium dodecylbenzene sulfonate. Colloids Surf B Biointerfaces 2010; 76:340-5. [DOI: 10.1016/j.colsurfb.2009.11.017] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2009] [Revised: 11/23/2009] [Accepted: 11/23/2009] [Indexed: 11/18/2022]
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Prasad BB, Tiwari K, Singh M, Sharma PS, Patel AK, Srivastava S. Zwitterionic molecularly imprinted polymer-based solid-phase micro-extraction coupled with molecularly imprinted polymer sensor for ultra-trace sensing of L-histidine. J Sep Sci 2009; 32:1096-105. [DOI: 10.1002/jssc.200800595] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Arvand M, Zanjanchi MA, Islamnezhad A. Zeolite-Modified Carbon-Paste Electrode as a Selective Voltammetric Sensor for Detection of Tryptophan in Pharmaceutical Preparations. ANAL LETT 2009. [DOI: 10.1080/00032710902721964] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ni Y, Kokot S. Does chemometrics enhance the performance of electroanalysis? Anal Chim Acta 2008; 626:130-46. [PMID: 18790114 DOI: 10.1016/j.aca.2008.08.009] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2008] [Revised: 08/12/2008] [Accepted: 08/13/2008] [Indexed: 11/18/2022]
Abstract
This review explores the question whether chemometrics methods enhance the performance of electroanalytical methods. Electroanalysis has long benefited from the well-established techniques such as potentiometric titrations, polarography and voltammetry, and the more novel ones such as electronic tongues and noses, which have enlarged the scope of applications. The electroanalytical methods have been improved with the application of chemometrics for simultaneous quantitative prediction of analytes or qualitative resolution of complex overlapping responses. Typical methods include partial least squares (PLS), artificial neural networks (ANNs), and multiple curve resolution methods (MCR-ALS, N-PLS and PARAFAC). This review aims to provide the practising analyst with a broad guide to electroanalytical applications supported by chemometrics. In this context, after a general consideration of the use of a number of electroanalytical techniques with the aid of chemometrics methods, several overviews follow with each one focusing on an important field of application such as food, pharmaceuticals, pesticides and the environment. The growth of chemometrics in conjunction with electronic tongue and nose sensors is highlighted, and this is followed by an overview of the use of chemometrics for the resolution of complicated profiles for qualitative identification of analytes, especially with the use of the MCR-ALS methodology. Finally, the performance of electroanalytical methods is compared with that of some spectrophotometric procedures on the basis of figures-of-merit. This showed that electroanalytical methods can perform as well as the spectrophotometric ones. PLS-1 appears to be the method of practical choice if the %relative prediction error of approximately +/-10% is acceptable.
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Affiliation(s)
- Yongnian Ni
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi 330047, China.
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Farias PAM, Castro AA, Wagener ADLR, Miguel EM, Cabral OV. Histidine Determination in the Presence of Copper in Diluted Alkaline Electrolyte by Adsorptive Stripping Voltammetry at the Mercury Film Electrode. ANAL LETT 2008. [DOI: 10.1080/00032710802052742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Raoof JB, Ojani R, Karimi-Maleh H. Carbon Paste Electrode Incorporating 1-[4-(Ferrocenyl Ethynyl) Phenyl]-1-Ethanone for Electrocatalytic and Voltammetric Determination of Tryptophan. ELECTROANAL 2008. [DOI: 10.1002/elan.200704176] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chen H, Li L, Zhou M, Ma YJ. Flow-injection chemiluminescence determination of tryptophan using galangin-potassium permanganate–polyphosphoric acid system. CHINESE CHEM LETT 2008. [DOI: 10.1016/j.cclet.2007.10.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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ENSAFI AA, HAJIAN R. Determination of Losartan and Triamterene in Pharmaceutical Compounds and Urine Using Cathodic Adsorptive Stripping Voltammetry. ANAL SCI 2008; 24:1449-54. [DOI: 10.2116/analsci.24.1449] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
| | - Reza HAJIAN
- Department of Chemistry, Isfahan University of Technology
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Electrochemical Sensor for Tryptophan Determination Based on Copper-cobalt Hexacyanoferrate Film Modified Graphite Electrode. SENSORS 2007; 7:2446-2457. [PMID: 28903237 PMCID: PMC3864532 DOI: 10.3390/s7102446] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2007] [Accepted: 10/15/2007] [Indexed: 11/30/2022]
Abstract
In this work, the development of a tryptophan sensor and its application to milk are described. The mixed metal (copper and cobalt) hexacynoferrates are electrodeposited on the graphite electrode, and this film exhibits an electrocatalytic activity towards for the oxidation of tryptophan. The experimental conditions, including the scan cycles, the ratio of copper(II) and cobalt(II), pH value, applied potential, are investigated in detail. At the optimal conditions, the eletctrocatalytic response is a linear relationship with the concentration of tryptophan in the range of 10 μM and 900 μM, with a detection limit of about 6 μM. This modified electrode was also successfully used to detect the tryptophan concentration in milk.
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