1
|
Pereira TC, Stradiotto NR. Electrochemical sensing of lactate by using an electrode modified with molecularly imprinted polymers, reduced graphene oxide and gold nanoparticles. Mikrochim Acta 2019; 186:764. [PMID: 31713083 DOI: 10.1007/s00604-019-3898-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 10/06/2019] [Indexed: 11/25/2022]
Abstract
This paper reports on a sensitive and selective electrochemical sensor for lactic acid. The sensor is based on molecularly imprinted polymers (MIP), obtained on glassy carbon electrode (GCE) modified with reduced graphene oxide and gold nanoparticles. The MIP was obtained by electropolymerization of the o-phenylenediamine (o-PD) on the modified surface of the GCE in the presence of lactic acid. The steps involving the GCE modification and MIP construction were characterized by cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy and atomic force microscopy. The results were evaluated using differential pulse voltammetry, using the hexacyanoferrate redox system as an electrochemical probe. Under optimized experimental conditions, the imprinted sensor has a linear response in the 0.1 nM to 1.0 nM lactic acid concentration range, with detection limit of 0.09 nM. The sensor exhibits excellent selectivity in the presence of molecules of similar chemical structure. It was applied for the selective determination of lactic acid in sugarcane vinasse. The recovery values ranged from 97.7 to 104.8%. Graphical abstractSchematic representation for MIP/AuNP/RGO/GCE sensor, obtained by electropolymerization of o-phenylediamine (o-PD) on a surface modified with gold nanoparticles (AuNPs) and reduced graphene oxide (RGO). These materials allowed the construction of a MIP-sensor with good selectivity for lactic acid.
Collapse
Affiliation(s)
- Thulio César Pereira
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, CEP:14800-060, Brazil.
- Bioenergy Research Institute, São Paulo State University (UNESP), Araraquara, São Paulo, CEP:14800-060, Brazil.
| | - Nelson Ramos Stradiotto
- Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, CEP:14800-060, Brazil
- Bioenergy Research Institute, São Paulo State University (UNESP), Araraquara, São Paulo, CEP:14800-060, Brazil
| |
Collapse
|
2
|
Cardoso de Sá A, Cristina Sedenho G, Paim LL, Ramos Stradiotto N. New Method for Carbohydrates Determination in Sugarcane Bagasse by HPAEC-RPAD Using Glassy Carbon Electrode Modified with Carbon Nanotubes and Nickel Nanoparticles. ELECTROANAL 2017. [DOI: 10.1002/elan.201700561] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Acelino Cardoso de Sá
- São Paulo State University (Unesp); Institute of Chemistry, Analytical Chemistry Department, Rua Prof. Francisco Degni, 55; Araraquara, SP Brazil
- São Paulo State University (Unesp); Bioenergy Research Institute (IPBEN); Araraquara, SP Brazil
| | - Graziela Cristina Sedenho
- São Paulo State University (Unesp); Institute of Chemistry, Analytical Chemistry Department, Rua Prof. Francisco Degni, 55; Araraquara, SP Brazil
| | - Leonardo Lataro Paim
- São Paulo State University (Unesp); Energy Engineering, Experimental Campus of Rosana; Av. dos Barrageiros, 1881, Primavera Rosana, SP Brazil
| | - Nelson Ramos Stradiotto
- São Paulo State University (Unesp); Institute of Chemistry, Analytical Chemistry Department, Rua Prof. Francisco Degni, 55; Araraquara, SP Brazil
- São Paulo State University (Unesp); Bioenergy Research Institute (IPBEN); Araraquara, SP Brazil
- Fluminense Federal University (UFF); School of Industrial Metallurgical Engineering (EEIMVR); Volta Redonda, RJ Brazil
| |
Collapse
|
3
|
Non-enzymatic sensors based on in situ laser-induced synthesis of copper-gold and gold nano-sized microstructures. Talanta 2017; 167:201-207. [PMID: 28340711 DOI: 10.1016/j.talanta.2017.01.089] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 01/26/2017] [Accepted: 01/30/2017] [Indexed: 11/27/2022]
Abstract
The synthesis of conductive gold and copper-gold microstructures with high developed surface based on the method of laser-induced metal deposition from solution was developed. The topology and crystallization phase of these structures were observed by means of scanning electron microscopy and X-ray diffraction, respectively. The electrochemical properties of the synthesized materials were investigated using cyclic voltamperometry and amperometry. According to the obtained results, it was found out that copper-gold microstructures demonstrate a linear dependence of Faraday current vs. concentration from 0.025 to 5µM for D-glucose and from 0.025 to 10µM for hydrogen peroxide. In turn, gold deposit exhibits a linear dependence of Faraday current vs. concentration from 0.025 to 50µM for D-glucose and from 0.025 to 1µM for hydrogen peroxide. Moreover, the synthesized materials reveal low detection limits (0.025µM) with respect to the aforementioned analytes, which is quite promising for their potential application in design and fabrication of new non-enzymatic biosensors.
Collapse
|
4
|
Beluomini MA, da Silva JL, Sedenho GC, Stradiotto NR. D-mannitol sensor based on molecularly imprinted polymer on electrode modified with reduced graphene oxide decorated with gold nanoparticles. Talanta 2016; 165:231-239. [PMID: 28153247 DOI: 10.1016/j.talanta.2016.12.040] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 12/17/2016] [Accepted: 12/19/2016] [Indexed: 10/20/2022]
Abstract
An electrochemical sensor for D-mannitol based on molecularly imprinted polymer on electrode modified with reduced graphene oxide decorated with gold nanoparticles was developed in this present work. The sensor was constructed for the first time via the electropolymerization of o-phenylenediamine (o-PD) over a surface containing reduced graphene oxide (RGO) and gold nanoparticles (AuNP) in the presence of D-mannitol molecules. The surface modification with AuNP/RGO-GCE facilitated the charge transfer processes of [Fe(CN)6]3-/4-, which was used as an electrochemical probe. It also contributed meaningfully towards the increase in the surface/volume ratio, creating more locations for imprinting, and providing greater sensitivity to the sensor. The MIP/AuNP/RGO-GCE sensor was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), atomic force microscope (AFM) and X-ray Photoelectron Spectroscopy (XPS). Important parameters that exert control over the performance of the molecularly imprinted sensor (such as number of cycles, pH, monomer and template concentration and extraction and rebinding conditions) were investigated and optimized. The imprinting factor was 4.9, showing greater response to the D-mannitol molecule compared to the interfering molecules. The limit of detection, limit of quantification and amperometric sensitivity were 7.7×10-13molL-1, 2.6×10-12molL-1 and 3.9×1010µALmol-1 (n=3) respectively. The MIP/AuNP/RGO-GCE sensor was successfully applied towards the selective determination of D-mannitol in sugarcane vinasse, thus making it, in essence, a valuable tool for the accurate and reliable determination of this molecule.
Collapse
Affiliation(s)
- Maísa Azevedo Beluomini
- Analytical Chemistry Department, Chemistry Institute, Universidade Estadual Paulista (UNESP), Rua Prof. Francisco Degni, 55, 14800-060 Araraquara, SP, Brazil.
| | - José L da Silva
- Analytical Chemistry Department, Chemistry Institute, Universidade Estadual Paulista (UNESP), Rua Prof. Francisco Degni, 55, 14800-060 Araraquara, SP, Brazil
| | - Graziela Cristina Sedenho
- Analytical Chemistry Department, Chemistry Institute, Universidade Estadual Paulista (UNESP), Rua Prof. Francisco Degni, 55, 14800-060 Araraquara, SP, Brazil
| | - Nelson Ramos Stradiotto
- Analytical Chemistry Department, Chemistry Institute, Universidade Estadual Paulista (UNESP), Rua Prof. Francisco Degni, 55, 14800-060 Araraquara, SP, Brazil
| |
Collapse
|
5
|
Pospísilová M, Polásek M, Safra J, Petriska I. Determination of mannitol and sorbitol in infusion solutions by capillary zone electrophoresis using on-column complexation with borate and indirect spectrophotometric detection. J Chromatogr A 2007; 1143:258-63. [PMID: 17266976 DOI: 10.1016/j.chroma.2007.01.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 12/21/2006] [Accepted: 01/02/2007] [Indexed: 11/16/2022]
Abstract
Capillary zone electrophoresis with indirect UV detection at 215 nm was applied for the separation and determination of mannitol (MA), sorbitol (SO) and xylitol in the form of anionic borate-polyol complexes. The separation was carried out in a fused silica capillary (total length 60 cm, effective length 50 cm, I.D. 50 microm) at 25 kV. The optimized background electrolyte was 200 mM borate buffer (pH 9.3, adjusted with triethylamine) containing 10 mM 3-nitrobenzoate as the chromogenic co-ion. The separation took approximately 13 min. The rectilinear calibration range was 0.2-2 mg mL(-1) for MA and SO when using xylitol (1 mg mL(-1)) as the internal standard. The limit of detection at a S/N of 3 was approximately 30 microg mL(-1) for either analyte. The method was used for the assay of MA or SO in pharmaceutical infusion solutions. The RSD values were 0.15% or 1.07% (n=6) when determining 100 mg mL(-1) of MA or 50 mg mL(-1) of SO in commercial infusion solutions. The results were in good agreement with those of pharmacopoeial iodimetric titration.
Collapse
Affiliation(s)
- Marie Pospísilová
- Department of Analytical Chemistry, Faculty of Pharmacy, Charles University in Prague, Heyrovského 1203, CZ-500 05 Hradec Králové, Czech Republic.
| | | | | | | |
Collapse
|
6
|
Luque de Castro MD, González-Rodríguez J, Pérez-Juan P. Analytical Methods in Wineries: Is It Time to Change? FOOD REVIEWS INTERNATIONAL 2007. [DOI: 10.1081/fri-200051897] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - J. González-Rodríguez
- b Southampton Oceanography Centre, George Deacon Division , Waterfront Campus, European Way, Southampton , United Kingdom
| | - P. Pérez-Juan
- c LIEC , Polígono Industrial, Manzaranes Ciudad Real , Spain
| |
Collapse
|
7
|
Squillante E, Morshed G, Bagchi S, Mehta KA. Microencapsulation of β-galactosidase with Eudragit L-100. J Microencapsul 2003. [DOI: 10.3109/02652040309178058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- E. Squillante
- College of Pharmacy, St. John's University, 8000 Utopia Parkway, JamaicaNY, 11439, USA
| | - G. Morshed
- College of Pharmacy, St. John's University, 8000 Utopia Parkway, JamaicaNY, 11439, USA
| | - S. Bagchi
- College of Pharmacy, St. John's University, 8000 Utopia Parkway, JamaicaNY, 11439, USA
| | - K. A. Mehta
- Rohm Pharma Polymers, Deguss Corporation, 2 Turner Place, Piscataway, NJ, 08855, USA
| |
Collapse
|
8
|
Casella IG, Gatta M. Electrocatalysis and Detection of Carbohydrates byAnion-Exchange Chromatography at a Gold Substrate Electrode Modified with Nickel Cyanide Ions. ELECTROANAL 2001. [DOI: 10.1002/1521-4109(200105)13:7<549::aid-elan549>3.0.co;2-a] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
9
|
Casella IG, Gatta M. Determination of electroactive organic acids by anion-exchange chromatography using a copper modified electrode. J Chromatogr A 2001; 912:223-33. [PMID: 11330792 DOI: 10.1016/s0021-9673(01)00590-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An ion-chromatographic method combined with electrochemical detection at a copper-based chemically modified glassy carbon electrode (Cu-GC) has been shown to provide a simple analytical approach for the determination of some common organic acids in alkaline medium. Under the optimized isocratic chromatographic conditions (i.e. 0.1 M NaOH plus 80 mM CH3COONa), organic acids such as gallic, ascorbic, gluconic, lactobionic, galacturonic and glucuronic acid could be separated in less than 20 min. Under constant potential amperometric detection (i.e. 0.55 V vs. Ag-AgCl) the Cu-GC modified electrode allowed detection limits between 2 and 5 pmol for all investigated organic acids while the linear dynamic range spanned generally over three orders of magnitude. Examples of applications included the separation and quantitation of some common organic acids in vinegar, honey and tea samples, are given.
Collapse
Affiliation(s)
- I G Casella
- Dipartimento di Chimica, Universita' degli Studi della Basilicata, Potenza, Italy.
| | | |
Collapse
|
10
|
Yang M, Tomellini SA. An HPLC detection scheme for underivatized amino acids based on tryptophan fluorescence recovery. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(99)00882-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
11
|
Casella IG, Guascito MR. Electrochemical preparation of a composite gold–cobalt electrode and its electrocatalytic activity in alkaline medium. Electrochim Acta 1999. [DOI: 10.1016/s0013-4686(99)00315-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
12
|
Anodic electrodeposition of conducting cobalt oxyhydroxide films on a gold surface. XPS study and electrochemical behaviour in neutral and alkaline solution. J Electroanal Chem (Lausanne) 1999. [DOI: 10.1016/s0022-0728(99)00366-6] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
13
|
Casella IG, Guascito MR, Cataldi TR. Electrocatalysis and amperometric detection of alditols and sugars at a gold–nickel composite electrode in anion-exchange chromatography. Anal Chim Acta 1999. [DOI: 10.1016/s0003-2670(99)00420-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|