Rapid voltammetric method for the estimation of tocopherols and antioxidants in oils and fats

McBride, Harold D.; Evans, Dennis H.

doi:10.1021/ac60325a003

Cited by 62 publications

(26 citation statements)

References 13 publications

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“…Analysis of the -γ-Oryzanol component from crude oils was performed by HPLC following a previously reported (McBride et al,1973) reverse phase HPLC method. HPLC unit model Hitachi L-6200, specifications as: column (C 18, 150 x 2.1 mm, 5 m), UV / Vis.…”

Section: Analysis Of Extracted Oilsmentioning

confidence: 99%

Methodical characterization of rice ( <i>Oryza sativa</i> ) bran oil from Pakistan

Anwar¹,

Anwer

Mahmood³

2005

Grasas y Aceites

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Section: Analysis Of Extracted Oilsmentioning

confidence: 99%

Methodical characterization of rice ( <i>Oryza sativa</i> ) bran oil from Pakistan

Anwar¹,

Anwer

Mahmood³

2005

Grasas y Aceites

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“…Cyclic voltammetry (CV) or linear sweep voltammetry (LSV) [12][13][14], differential pulse voltammetry [15,16], square wave voltammetry [17,18], the combination with HPLC detection [19,20] and flow systems such as flow injection analysis (FIA) [9] have been used over a broad range of biological fluids. More recently, other assays such as the reducing antioxidant capacity evaluated by electrolysis (RACE) [21], the rapid electrochemical screening of antioxidant capacity (RESAC) [22] or microfluidic devices [23] were proposed.…”

Section: Introductionmentioning

confidence: 99%

Large scale inkjet-printing of carbon nanotubes electrodes for antioxidant assays in blood bags

Lesch

Cortés‐Salazar

Prudent

et al. 2014

Journal of Electroanalytical Chemistry

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a b s t r a c tHerein, we present the large scale fabrication of carbon nanotubes (CNT) electrodes supported on flexible polymeric sheets by subsequent multilayer inkjet printing of a silver layer for electrical connection, CNT layers as active electrode material and an insulation layer to define a stand-alone CNT active electrode area with high accuracy. Optical and electrochemical characterization using several redox mediators demonstrates the reproducibility of the electrode surfaces and their functionality even with a single inkjet printed CNT layer. These electrodes are targeted to the clinical sector for the determination of the antioxidant power (AOP) of biologically relevant fluids by pseudo-titration voltammetry. As a proof-ofconcept, the AOP of ascorbic acid solutions and biological samples such as erythrocyte concentrates (ECs) from different blood donors were determined demonstrating the potential use of the presented CNT sensors on ECs for blood transfusion purposes and the clinical sector.

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“…The analysis is to be always performed in an acidic medium, using e.g. sulphuric acid [36], perchloric acid [37,38], hydrochloric acid [39] or acetic acid [40], in the presence of an organic solvent, such as ethanol, methanol, benzene, acetone or acetonitrile, or their mixtures [36][37][38][39][40]. Literature also describes applications of various working electrodes.…”

Section: Central European Journal Of Chemistrymentioning

confidence: 99%

Differentiation between phenol- and amino-substances in voltammetry determination of synthetic antioxidants in oils

et al. 2010

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Abstract:The paper describes a method of voltammetric determination of antioxidants in lubricating oils developed with the use of Linear Sweep Voltammetry (LSV) and Fast Scan Differential Pulse Voltammetry (FSDPV). Experimental conditions have been found for simultaneous determination of phenol-based antioxidants and amino-antioxidants: the phenols can be electrochemically oxidized using the polarisation of gold disc electrode (AuDE) in the potential range of 0-1400 mV in 0.2 M H 2 SO 4 in the presence of ethanol and acetonitrile at the ratio of 3:1. Secondary aromatic amines can be determined directly in this supporting electrolyte; the presence of phenolic antioxidants does not interfere with this analysis. On the other hand, secondary aromatic amines interfere with the determination of phenolic substances; therefore, the amines present have to be eliminated in a suitable way. A procedure for masking the aromatic amines using their reaction with nitrous acid has been suggested and optimised. The nitrosamines thus formed can be used for sensitive and selective determination of amino-antioxidants by means of cathodic reduction on the hanging mercury drop electrode (HMDE) using Fast Scan Differential Pulse Voltammetry. The method was applied in analysis of real samples of lubricating oils. © Versita Sp. z o.o.

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Rapid voltammetric method for the estimation of tocopherols and antioxidants in oils and fats

Cited by 62 publications

References 13 publications

Methodical characterization of rice ( <i>Oryza sativa</i> ) bran oil from Pakistan

Methodical characterization of rice ( <i>Oryza sativa</i> ) bran oil from Pakistan

Large scale inkjet-printing of carbon nanotubes electrodes for antioxidant assays in blood bags

Differentiation between phenol- and amino-substances in voltammetry determination of synthetic antioxidants in oils

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