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Square wave voltammetry

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Square wave voltammetric determination of valproic acid in pharmaceutical Preparations

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Abstract: The electrochemical behavior of valproic acid (VAL) was investigated using square wave voltammetry, cyclic voltammetry, and sampled direct current polarography and a new square wave voltammetric method was developed for determination of VAL in pharmaceutical preparations. Ag/AgCl 3 M KCl with a hanging mercury drop electrode in 0.05 M pH 3.3 Britton–Robinson (BR) buffer.

Luận văn Thạc sĩ Sinh học: Nghiên cứu tạo Biosensor xác định kháng nguyên HER2

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Điện cực Au sau khi hoàn tất các giai đoạn trên được tiến hành quét thế vòng (CV-cyclic voltammetry) và sóng vuông (square wave voltammetry -SWV) trong dung dịch điện li (K 4 Fe(CN) 6 5mM + K 3 Fe(CN) 6 5mM + KCl 0.1M). 5 để xác định sự thay đổi tín hiệu điện hóa so với điện cực Au ban đầu..

Voltammetric analysis of disulfiram in pharmaceuticals with a cyclic renewable silver amalgam film electrode

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Key words: Disulfiram, silver amalgam electrode, square wave voltammetry, drug analysis, Anticol.

An ultrasensitive electrochemical immunosensor platform based on disposable ITO electrode modified by 3-CPTMS for early detection of parathyroid hormone

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D) square wave voltammetry of the designed PTH immunosensor.. This regeneration procedure involved treatment of the ITO electrode, prepared under the same conditions, with HCl solution (10 mM, 5 min) to disrupt the weak interaction between antibody and antigen after 45 min of incubation in PTH antigen (50 fg/mL). The storage life of the PTH immunosensor was tested (Figure 6C). The response of the designed biosensor to SWV was observed.

An ionic liquid/bismuth film-modified sensor for the electrochemical detection of cefixime

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The IL/Bi modification process was analyzed by scanning electron microscopy (SEM) and electrochemical methods such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Next, the analytical performance of the novel sensor was evaluated by square wave voltammetry (SWV) in pharmaceutical samples with high accuracy. Electrochemical characterization of IL/Bi/PGE. This situation indicates facilitated conductivity and an electron transfer process at the IL/Bi-modified PGE..

Synthesis and electrochemistry of phthalocyanines bearing [(3,4-dimethoxybenzyl)oxy] groups

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The cyclic voltammetry (CV) and square wave voltammetry (SWV) of phthalocyanines 4–7 were recorded in a dichloromethane DCM/TBAP electrolyte system on a Pt working electrode. The results of voltammetric analyses are given in the Table. Metallophthalocyanines such as MnPc, CoPc, FePc, and TiOPc, having a metal that possesses energy levels lying between the HOMO and the LUMO of the Pc ligand, in general exhibit redox processes centered on the metal.

Nghiên cứu chế tạo điện cực nền cacbon nano biến tính xác định hàm lượng Pb (chì) trong nước biển

310244.pdf

dlib.hust.edu.vn

SV 41 Von - Ampe hòa tan anot Anodic Stripping Voltammetry ASV 42 Von - Ampe hòa tan catot Cathodic Stripping Voltammetry CSV 43 Von - Ampe hòa tan hấp phụ Adsorptive Stripping Voltammetry AdSV 44 Vol - Ampe xung vi phân Differential Pulse Voltammetry DP 45 Vol - Ampe sóng vuông Square Wave Voltammetry SQW Luận văn cao học GVHD: TS.

Development and validation of an HPLC method for determination of rofecoxib in bovine serum albumin microspheres

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In the literature, various methods were reported for the analysis of rofecoxib in bulk drug and pharmaceu- tical dosage forms [5,6] including High-Performance Liquid Chromatography (HPLC), square wave voltammetry [7], capillary electrophoretic [8], and spectrophotometric [9] methods. Of these methods, HPLC method is the most commonly used for the determination of rofecoxib in plasma [10–14].

Synthesis of nonperipherally tetra-[5-(diethylamino)-2-formylphenoxy] substituted metallophthalocyanines and their electrochemistry

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Voltammetric analysis of n-TY-Co, n-TY-Cu, n-TY-Mn was defined by using cyclic and square wave voltammetry. Voltammetric results show that n-TY-Co and n-TY-Cu give two reduction processes, but n-TY-Mn gives three reduction processes during the cathodic scans. Also, n-TY-Co, n-TY-Cu, and n-TY-Mn revealed electropolymerization responses during the anodic scans because the ligands containing [5-(diethylamino)-2- formylphenoxy] groups polymerize during the oxidation reaction..

Electrochemical monitoring of the interaction between mitomycin C and DNA at chitosan–carbon nanotube composite modified electrodes

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Different electrochemical techniques (cyclic voltammetry (CV), differential pulse voltammetry (DPV), square wave voltammetry, electrochemical impedance spectroscopy etc.) have been used for monitoring the interaction of anticancer drugs with DNA. 14 − 17 The interaction be- tween the anticancer drug epirubicin and DNA using differential pulse voltammetry and cyclic voltammetry at a carbon paste electrode was studied by Erdem et al. 18 Electrochemical investigation of the interaction between titanocene

Novel voltammetric investigation of dipyridamole at a disposable pencil graphite electrode

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Determination of dipyridamole in pharmaceutical preparations using square wave voltammetry. 10.1016/j.jpba . doi: 10.1016/j.colsurfb . doi: 10.1515/chempap . doi: 10.3906/kim-1504- 42. doi: 10.3906/kim-1708-14. 10.3906/kim-1705-51. doi: 10.3906/kim-1710-17. doi: 10.1016/j.sbsr . doi: 10.1016/j.jsamd . doi: 10.1007/s y. doi: 10.3906/kim-1805-37. 10.3906/kim-1203-49. doi: 10.1039/c8ay02281j. doi: 10.1016/j.electacta . doi: 10.3390/s6111483. doi: 10.1371/journal.pone.0039660.

Electrochemical investigation of 2-[8-hydroxyquinoline-5-yl)azo]benzo[ c]cinnoline on a platinum electrode in dimethysulfoxide

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The applicability of square wave voltammetry (SWV) and differential pulse voltammetry (DPV) procedures as analytical methods for the determination of OHQAB was examined by measuring the cathodic peak current density as a function of the concentration of OHQAB. It is concluded that OHQAB could be determined by platinum electrode in the concentration range of mol L mol L − 1. Calibration graph of OHQAB a: DPV and b: SWV..

Synthesis and electrochemical and spectroelectrochemical characterization of chloromanganese(III) phthalocyanines

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The electrochemical properties of the manganese phthalocyanine com- plexes were investigated by cyclic and square wave voltammetry and the nature of the observed redox processes was studied by spectroelectrochemistry.. Phthalocyanines (Pcs) are one of the porphyrin analogs that possess a number of unusual properties. Following the first synthesis in 1907, metallophthalocyanines (MPcs) were used mainly as green and blue dyestuffs in industry.

Development of a biosensor platform based on ITO sheets modified with 3-glycidoxypropyltrimethoxysilane for early detection of TRAP1

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Another electrochemical method, square wave voltammetry was also applied to the biosensor to obtain a TRAP1 calibration graph. As can be extracted from the figure, SWV could also be successfully used for the biosensor as an electrochemical method. On the other hand, reproducibility represents closeness of the agreement between the electrochemical signals obtained. for the same target with the different biosensors which are fabricated by the same methodology.

Voltammetric determination of phenmedipham herbicide using a multiwalled carbon nanotube paste electrode

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Key words: Square-wave voltammetry, phenmedipham herbicide, carbon paste electrodes, determination. Carbamate compounds were synthesized at the beginning of the 1950s and are still used in pest control today due to their broad spectrum of biological activity.

Reduction behavior of fenoxaprop-p-ethyl and its voltammetric determination

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The electrochemical behavior of FNX on a HMDE was studied by using cyclic voltammetry (CV), square-wave voltammetry (SWV), and constant potential bulk electrolysis (BE).. Then standard FNX solution was added to the cell. The first reduction peak was at around –0.7 V and the second one at around –0.9 V. These peaks disappeared when only BR was scanned and the peak current increased linearly with increasing FNX concentration (Figure 1)..

Electrochemical detection of DNA interaction with Mannich base derivatives by disposable graphite electrodes

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The voltammetric detection of the interaction between lycorine (LYC) and calf thymus dsDNA/calf thymus single-stranded DNA (ssDNA) was studied based on the oxidation signals of guanine and adenine by using DPV at a carbon paste electrode (CPE) and PGE. 25 studied the electrochemical monitoring of the interaction between the anthraquinone drug mitoxantrone (MTX) and dsDNA or ssDNA by using a glassy carbon electrode (GCE) in connection with square-wave voltammetry (SWV) and differential pulse voltammetry

Determination of morin on an electrochemically activated carbon-paste electrode

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Using square-wave voltammetry (A = 35 mV, ν = 25 Hz, υ = 100 mV/s) it is possible to determine morin in the range of concentrations of 6–0.8 µM (with 0.314 µA/µM sensitivity) and 0.8–0.16 µM (with 0.557 µA/µM sensitivity). The developed sensor was tested for the determination of morin in model solutions and Coffea arabica extracts with RSD lower than 4.5%.. According to recent studies, 1 − 4 morin plays an important role in the protection of human erythro- cytes.

Determination of zineb in tap water and tomato samples by adsorptive catalytic stripping voltammetry

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Square wave voltammograms obtained for 3.0 µ M of standard zineb in the absence (1) and presence (2) of peroxydisulfate ion (2 mM) in acetate buffer at pH 3. as polarography and voltammetry can be also used for determination of pesticides. A polarographic method has been reported for determination of zineb and maneb (manganese ethylene-bis-dithiocarbamate) in 40%.

Nghiên cứu xác định lượng vết asen trong môi trường nước bằng phương pháp von-ampe hòa tan

Information_on_doctoral_thesis.doc

tainguyenso.vnu.edu.vn

“Gold film electrode preparation and activation methods for the determination of arsenic by differential pulse anodic stripping voltammetry”. Hoang Trong Sy, Hoang Thai Long, Le Thi Anh Phuong (2010). “Determination of As(III) by square wave anodic stripping voltammetry method using gold film electrode ex situ”