Analysis of amino acids in complex samples by using voltammetry and multivariate calibration methods

Moreno, L.; Merkoçi, Arben; Alegret, Salvador; Hernández-Cassou, Santiago; Saurina, Javier

doi:10.1016/j.aca.2003.11.048

Cited by 43 publications

(21 citation statements)

References 34 publications

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“…A low oxidation potential for amino acids was obtained compared with Pt disc electrodes. (25) The electrochemical measurements using K 3 [Fe(CN) 6 ] and amino acids revealed that the peak current intensities using the CNT-arrayed electrodes were about 100-fold higher than those using bare Pt electrodes. The results indicated that the biosensors based on CNT-arrayed electrodes showed a high sensitivity suitable to detect biomolecules.…”

Section: (A) Figure 2(b)mentioning

confidence: 99%

Electrochemical Amperometric Biosensors Based on Directly Synthesized Carbon Nanotube Electrodes

2009

Sensors and Materials

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In recent years, label-free detections of biomolecules have attracted great attention in many fi elds of life science such as genomics, clinical diagnosis, and practical pharmacy. In this article, we review electrochemical amperometric biosensors based on carbon nanotube (CNT) electrodes. In electrochemical detections, CNT electrodes promote electron transfer reactions on CNT surfaces. Since CNTs have a large specifi c surface area, the direct synthesization of CNTs on electrodes in amperometric biosensors is expected to signifi cantly enhance electroactive surface area. In this review, we discuss the technology and performance of the electrochemical biosensors based on CNT electrodes and describe microfl udic chips with multibiosensors based on CNT electrodes for commercialization.

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Section: (A) Figure 2(b)mentioning

confidence: 99%

Electrochemical Amperometric Biosensors Based on Directly Synthesized Carbon Nanotube Electrodes

2009

Sensors and Materials

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“…These interactions were observed using the electrochemical technique, differential pulse voltammetry (DPV). While differential pulse voltammetry has been utilized to detect amino acids [20] and biological molecules [21] at platinum, to the best of our knowledge, this is the first report in which chiral discrimination between two enantiomers of amino acids at chiral polyaniline has been observed using this simple, but rapid electrochemical technique.…”

Section: Introductionmentioning

confidence: 99%

Enantioselective Detection of D‐ and L‐Phenylalanine Using Optically Active Polyaniline

Sheridan

Breslin

2005

Electroanalysis

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Chiral conducting polyaniline, which was prepared electrochemically from (þ) and (À) camphorsulfonic acid, was utilized for the enantiomeric detection of phenylalanine in neutral phosphate buffer solution. Following electropolymerization the polymer films were dedoped in aqueous ammonia and subsequently shown to maintain their chiral character. The electrochemical window for this polymer was determined to be between 0.2 V and 0.8 V (vs. SCE) and enantiomeric discrimination between l-and d-phenylalanine was seen with the application of differential pulse voltammetry. The (þ) chiral polymer is shown to behave as an enantiomeric detector for the d enantiomer producing a peak in the voltammogram at ca. 0.7 V (vs. SCE) while the inverse is true for the (À) polymer, which detects the l enantiomer.

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“…High resolution transmission electron microscopy (HRTEM) images sowed that encapsulated C 60 self-assembles into chains of the spherical molecule and that single C 60 molecules can spontaneously jump nanometer distances along the axis of the containing nanotube when excited with a electron beam 37 . A better nomenclature was proposed to be X@SWCNT in accordance with the nomenclature for the filled fullerenes (e. g. Gd@C 82 ) 38 . Upon thermal annealing, the encapsulated fullerenes fuse in the interior of the SWCNT, which results in a new, concentric endohedral nanotube with a diameter of 0.7 nm.…”

Section: Endohedral Functionalisationmentioning

confidence: 99%

“…Biological warfare agents such as toxins and various pathogenic organisms [80][81][82][83] , such as Salmonella typhi, Vibrio cholerae, etc, are extremely dangerous for human health 62 . Very low concentration of these toxins/bacteria in the air, food or water can cause illness or even death.…”

Section: Detection Of Various Toxic Proteins Bacteria and Virusesmentioning

confidence: 99%

Carbon Nanotubes: Detection of Chemical and Biological Warfare Agents

Kumar¹,

Singh²,

Rao³

et al. 2008

DSJ

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Discovery of carbon nanotubes has great impact on the development of newer methodologies and devices useful for the analysis of various types of chemicals. The functionalisation of CNTs with biomolecules related to chemical and biological warfare agents makes these useful for the detection of these agents. The detection sensitivity can be increased manyfold. Various types of chemical and biological sensors were developed using various type of carbon nanotubes as well as nano particles of different metals.

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Analysis of amino acids in complex samples by using voltammetry and multivariate calibration methods

Cited by 43 publications

References 34 publications

Electrochemical Amperometric Biosensors Based on Directly Synthesized Carbon Nanotube Electrodes

Electrochemical Amperometric Biosensors Based on Directly Synthesized Carbon Nanotube Electrodes

Enantioselective Detection of D‐ and L‐Phenylalanine Using Optically Active Polyaniline

Carbon Nanotubes: Detection of Chemical and Biological Warfare Agents

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