Voltammetric determination of vitamin E (α-Tocopherol acetate) in multicomponent vitaminized mixtures

Mikheeva, Elena Valentionovna; Anisimova, L. S.

doi:10.1134/s1061934807040144

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…A carbon paste electrode with both CNT and DNA was used for determining the analyte in soybean oil, using SWSV . Some authors used GC electrodes in several media (acetonitrile, water and their mixture, also in the presence of surfactants) with DPV or just LSV as technique for determining α‐tocopherol in pharmaceutical samples and related matrices . In a case , the analyte was determined in presence of sylmarin, a compound used in the treatment of liver diseases.…”

Section: Fat Soluble Vitaminsmentioning

confidence: 99%

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Recent Advances in Electroanalysis of Vitamins

Brunetti

2016

Electroanalysis

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Vitamins are a chemically heterogeneous group of compounds known as essential for the normal functioning of the organic metabolism. Their decrease in humans can lead to several diseases and not being produced by the body, they need to be obtained from dietary sources or supplements. For these reasons, their determination in food, pharmaceutical and clinical samples is crucial. This article reviews key advances in electrochemical measurements of vitamins over the past decade. Particular attention is given to papers proving applicability to real samples analysis. The technical features of the proposed sensors are presented and discussed along with their analytical performances. Future trends and challenges are also addressed.

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Section: Fat Soluble Vitaminsmentioning

confidence: 99%

“…The redox behavior of all the fat soluble vitamins was recently reviewed . The same author and others presented also more recent voltammetric studies in some solvents, such as dichloromethane and acetonitrile but also in water .…”

Section: Fat Soluble Vitaminsmentioning

confidence: 99%

Recent Advances in Electroanalysis of Vitamins

Brunetti

2016

Electroanalysis

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“…Tocopherols as major forms of vitamin E (VE) are considered as naturally occurring lipophilic phenolic antioxidants, especially in vegetable oils such as corn, soybean, cottonseed, and sesame [1]. Often, they are found in pharmaceuticals and cosmetics products due to their biological activity [2][3][4], which consists of polyunsaturated fatty acids and their esters, renowned for inhibiting free-radical chain auto-oxidation [5][6][7][8][9]. The dosage of tocopherols for dietary intake is important because they protect the phospholipid bilayer from free radicals.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behaviour of Tocopherols: Possibilities of Their Simultaneous Voltammetric Detection

et al. 2021

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An electroanalytical study for possible simultaneous detection of three naturally occurring isomers of vitamin E (α, γ, and δ-tocopherol) was performed. This research includes several optimization steps, such as selection of electrode material, composition of working medium, selection of electrochemical technique, and parameters of square-wave voltammetry (SWV), to reach a well-defined recognition of peaks. A glassy carbon electrode, 99.9% acetonitrile containing 0.1 mol L−1 lithium perchlorate, SWV at the potential step of 1 mV, potential amplitude of 25 mV, and frequency of 25 Hz were decided as the most suitable working conditions. Nevertheless, the corresponding anodic peaks were not sufficiently separated due to their overlapping. Thus, four standard evaluation methods (polynomial or linear baseline, zero base, and deconvolution) were compared, and the last-mentioned method was chosen as optimum. Similar linear ranges from 3.0 × 10−6 to 1.0 × 10−5 mol L−1 were obtained for α, γ, and δ-tocopherol, characterized by determination coefficient of 0.998, 0.985, and 0.994, quantification limits of 11.28, 2.70, and 3.67 × 10−6 mol L−1 and detection limits of 3.72, 0.89, and 1.21 × 10−6 mol L−1, respectively. A recovery from 72.0 to 128.5% for different concetration ratios of tocopherols has been achieved. This recovery range is in the accordance with values reported for liquid chromatography.

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“…Already published electrochemical methods were focused only on the determination of α‐tocopheryl acetate, predominantly in pharmaceutical preparations [8–11]. Present voltammetric approach offers for the first time the possibility of simultaneous determination of a pair of these esters, namely all‐ trans ‐retinyl acetate (RAc) or all‐ trans ‐retinyl palmitate (RPa) together with α‐TOAc, utilizing the fact that cosmetic products usually contain only one ester derived from all‐ trans ‐retinol.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Lipophilic Vitamin Esters Using Square‐wave Voltammetry at the Glassy Carbon Electrode

et al. 2020

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Simple and rapid voltammetric method for simultaneous determination of all‐trans‐retinyl acetate (RAc) or all‐trans‐retinyl palmitate (RPa) and α‐tocopheryl acetate (α‐TOAc) has been proposed. The respective method was based on the anodic oxidation of the compounds of interest by square‐wave voltammetry in acetone with 0.1 mol L−1 LiClO4 at the glassy carbon electrode. The procedure was also beneficial with respect to simple dissolution of sample directly in the supporting electrolyte. The all‐trans‐retinyl acetate could be quantified in two linear ranges (3.1–140 μmol L−1 and 140–400 μmol L−1) and α‐tocopheryl acetate in linear range 5.3–400 μmol L−1 with detection limits of 0.9 μmol L−1 RAc (or 0.8 μmol L−1 RPa) and of 1.6 μmol L−1 α‐TOAc. Selected commercial cosmetic products were analysed achieving satisfactory recoveries.

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Voltammetric determination of vitamin E (α-Tocopherol acetate) in multicomponent vitaminized mixtures

Cited by 8 publications

References 5 publications

Recent Advances in Electroanalysis of Vitamins

Recent Advances in Electroanalysis of Vitamins

Electrochemical Behaviour of Tocopherols: Possibilities of Their Simultaneous Voltammetric Detection

Simultaneous Determination of Lipophilic Vitamin Esters Using Square‐wave Voltammetry at the Glassy Carbon Electrode

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