Influence of Cetyltrimethylammonium Bromide on the Voltammetric Behavior of Thiopurines at a Silver Electrode

Zeng, Baizhao; Purdy, William C.

doi:10.1002/(sici)1521-4109(199908)11:12<879::aid-elan879>3.0.co;2-m

Cited by 16 publications

(2 citation statements)

References 18 publications

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“…Long‐chain surfactants such as cetyltrimethyl‐ammonium bromide (CTAB) were successfully used to improve the sensitivity of adsorptive voltammetry when determining the presence of thiopurines , phenol , thyroxine , estrogens , and bisphenol A . This approach is based on analyte accumulation as induced by ion‐exchange interaction, or the adsorption of the hydrophobic tail of CTA + to the electrode surface.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive Voltammetry for the Determination of Ochratoxin A Using Enrichment Effect by Cationic Surfactants

et al. 2018

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A rapid and simple electrochemical method was utilized for the determination of the presence of classic fungal metabolite ochratoxin A (OTA) based on differential pulse adsorptive voltammetry, using the carbon nanotube paste (CNTP) electrode. OTA showed a clear oxidation peak, and the CNTP electrode exhibited a more sensitive response to OTA oxidation than the glassy carbon, the plastic formed carbon, and the carbon paste electrodes. The addition of long‐chain cationic surfactants, such as benzethonium chloride, cetyltrimethylammonium bromide, and benzyldimethyltetradecylammonium chloride (zephiramine), enhanced the electrochemical response of OTA. Under optimized experimental conditions, the calibration plots are linear in the 5×10−6−5×10−5 M OTA concentration range, and the limit of detection is 1.1×10−6 M. In order to improve the selectivity for OTA determination, we attempted to combine this adsorptive stripping voltammetric technique with “sequestration electrochemistry,” based on the specific interaction occurring between bovine serum albumin (BSA) and OTA. The peak current of OTA oxidation decreased substantially as a result of OTA‐BSA binding. Furthermore, it was demonstrated that the application of this proposed method of hydrodynamic adsorptive voltammetry, using a micro‐droplet and a rotating disk electrode, improves the approach's sensitivity and reduces the time and sample volume required for the analysis.

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Section: Introductionmentioning

confidence: 99%

Adsorptive Voltammetry for the Determination of Ochratoxin A Using Enrichment Effect by Cationic Surfactants

et al. 2018

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“…Surfactants adsorbed on the electrode surface change the characteristics of the metal|solution interface, making it easy for some organic compounds to adsorb at the electrode. Sometimes, adsorbed surfactants influence their voltammetric behavior, for example, they can increase the peak heights of some organics, cause the peak potential to shift and make the electrochemical process more reversible [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical study of a cetylpyridinium bromide/glutathione mixed membrane electrochemically deposited at polycrystalline Ag electrodes

Zeng

Huang

Zhao

et al. 2005

Journal of Electroanalytical Chemistry

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Electrochemistry of Silver

Orlik

Galus

2006

Encyclopedia of Electrochemistry

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The sections in this article are Properties of Ag Electrodes Polycrystalline Ag Electrodes Preparation Surface and Double‐layer Properties Single‐crystal Ag Electrodes Preparation Surface and Double‐layer Properties Surface Dynamics Affinity of Water and Nonaqueous Solvent Molecules to Ag Surfaces Adsorption of Inorganic Species on Ag Electrodes Halide Ions pc ‐ Ag Electrodes Single‐crystal Ag Electrodes Pseudohalide Oxygen and its Compounds Sulfur Compounds Inorganic Carbon Compounds Fullerenes Other Inorganic Compounds Metalocenes Adsorption of Organic Species on Ag Electrodes Hydrocarbons Pyridine and Other Nitrogen Compounds Carboxylic Acids Alcohols Sulfur Compounds Thiourea ( TU ) Alkanethiols and Self‐assembled Monolayers Biochemically Important Compounds Adsorption on Modified Ag Electrodes Other Organic Compounds Electrode Processes with Participation of Silver Electrodes Reactions Involving Oxidation of Ag Surface Oxygen and its Compounds Sulfur Compounds Carbon Compounds Electrode Reactions of Selected Organic Compounds, Adsorbed on Ag Electrodes Biochemically Important Species Underpotential Deposition Processes Ag UPD on Ag Ag UPD on Au and Pt Pb Tl Ni Chalcogenides Other Elements and Compounds Electrodeposition and Electrodissolution Processes of Ag Electrodeposition Processes Electrodissolution Processes Silver Compounds at the Oxidation States Higher Than I

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Influence of Cetyltrimethylammonium Bromide on the Voltammetric Behavior of Thiopurines at a Silver Electrode

Cited by 16 publications

References 18 publications

Adsorptive Voltammetry for the Determination of Ochratoxin A Using Enrichment Effect by Cationic Surfactants

Adsorptive Voltammetry for the Determination of Ochratoxin A Using Enrichment Effect by Cationic Surfactants

Electrochemical study of a cetylpyridinium bromide/glutathione mixed membrane electrochemically deposited at polycrystalline Ag electrodes

Electrochemistry of Silver

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