Combination of Flow Injection Analysis and Fast Scan Differential Pulse Voltammetry for the Determination of Antioxidants

Bavol, Dmytro; Dejmková, Hana; Scampicchio, Matteo; Zima, Jiřı́; Barek, Jiřı́

doi:10.1002/elan.201600526

Cited by 12 publications

(7 citation statements)

References 15 publications

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“…Cyclic voltammetry (CV) on carbon‐based electrodes in organic and water‐organic media is successfully applied for the investigation of capsaicinoids electrooxidation . An interesting approach for capsaicin determination on GCE is based on the combination of fast‐scan DPV with flow injection analysis system . Last decade, voltammetry on chemically modified electrodes is the most often used method for the capsaicinoids quantification.…”

Section: Introductionmentioning

confidence: 99%

Selective Determination of Total Capsaicinoids in Plant Material Using Poly(Gallic Acid)‐modified Electrode

et al. 2018

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Novel voltammetric approach for the selective determination of total capsaicinoids has been developed using glassy carbon electrode modified with multi‐walled carbon nanotubes and poly(gallic acid) (PGA/MWNT/GCE). The modified electrode provides significant improvements in the capsaicinoids voltammetric characteristics in comparison to GCE and MWNT/GCE. The electrooxidation of capsaicinoids is irreversible adsorption‐controlled process with the anodic transfer coefficient of 0.49–0.53 and heterogeneous electron transfer rate constant of 1300–2400 s−1. The analytical ranges of 0.010–1.0 and 1.0–50 μM for capsaicin, 0.025–0.75 and 0.75–75 μM for dihydrocapsaicin and 0.025–5.0 and 5.0–75 μM for nonivamide with the detection limits of 2.9, 5.9 and 6.1 nM, respectively, have been obtained using differential pulse voltammetry (DPV). The selectivity of the capsaicinoids quantification in the presence of ascorbic acid, α‐tocopherol and carotenoids is shown. The method has been tested on the samples of red hot pepper spices and Capsicum annuum L. tinctures. The results correspond to the chromatographic data.

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Section: Introductionmentioning

confidence: 99%

Selective Determination of Total Capsaicinoids in Plant Material Using Poly(Gallic Acid)‐modified Electrode

et al. 2018

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“…Nowadays, several methodologies, which employ the most diverse electrochemical techniques, are used in the determination of the total antioxidant capacity, among which, we can highlight the cyclic voltammetry [27] already mentioned, besides others, such as: differential pulse voltammetry [28], square wave voltammetry [29,30] and amperometry [31,32].…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Capacity and Total Phenol Content in Hop and Malt Commercial Samples

et al. 2017

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The antioxidant properties of commercial hops and malted barley were evaluated by electroanalytical methods and compared with spectrophotometric methods. Hop group showed better antioxidant capacity and total phenols content (TPC) values than malt group. The highest electrochemical Index (EI) was observed for HCO hop sample. Electrochemical Index (EI) showed a good Pearson correlation with ABTS (2,2′‐azino‐bis (3‐ethylbenzothiazoline‐6‐sulphonic acid)), DPPH (2,2‐diphenyl‐1‐picrylhydrazyl), and TPC, being of 0.85, 0.77 and 0.86 respectively for hop samples. While for the malt samples were 0.96, 0.69 and 0.49, respectively. The samples were compared to each other within each group and statistical differences can be observed, p<0.05. Therefore, the electroanalytical tools showed to be practical and easy to evaluate the antioxidant properties of hop and malt samples. The results may contribute to the selection of raw material for brewing and therefore with the quality of one of beverage one most consumed around the world.

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“…Many recent studies have focused on electrochemical methods for capsaicin measurement, proposing fast methods based on cyclic voltammetry , differential pulse voltammetry and amperometry . The comparison of the analytical characteristics of capsaicin determination with different methods is reported in the Table .…”

Section: Introductionmentioning

confidence: 99%

Capsaicinoids in Chili Habanero by Flow Injection with Coulometric Array Detection

et al. 2019

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This study presents a sensitive electroanalytical method for the determination of capsaicinoids in chili extracts using flow injection with coulometric array detector. Flow injection method was developed based on the coulometric signal of capsaicinoids obtained by high performance liquid chromatography with coulometric detector (HPLC‐ECD). Capsaicinoids concentration in 18 chili samples from Yucatán México cultivated in different types of soils was quantified using UHPLC‐DAD and HPLC‐ECD and expressed in Scoville units. The plants were cultivated in a greenhouse on three types of limestone soils, namely, red, black and brown. Chili peppers were harvested in two stages of maturity: immature (green), and mature (orange). HPLC‐ECD method showed ten times higher sensitivity compared to the UHPLC‐DAD. Capsaicinoid content in 18 chili samples was measured by flow injection method. The best correlation with the Scoville units was obtained by the analysis of the current signal of the sensor poised at +450 mV (R2=94). ANOVA analysis showed that the soil type and the harvest date were significant for the capsaicinoid content. Chili plants cultivated in red soil had higher capsaicinoid content. In addition, the capsaicinoid content was increasing at later harvest dates. In summary, the suggested flow injection method with coulometric array detector decreased the time of analysis from 15 min to 30 s. Therefore it can be successfully applied for the routine capsaicinoid analysis in chili.

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Combination of Flow Injection Analysis and Fast Scan Differential Pulse Voltammetry for the Determination of Antioxidants

Cited by 12 publications

References 15 publications

Selective Determination of Total Capsaicinoids in Plant Material Using Poly(Gallic Acid)‐modified Electrode

Selective Determination of Total Capsaicinoids in Plant Material Using Poly(Gallic Acid)‐modified Electrode

Antioxidant Capacity and Total Phenol Content in Hop and Malt Commercial Samples

Capsaicinoids in Chili Habanero by Flow Injection with Coulometric Array Detection

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