Electrochemical determination of antioxidant activity and HPLC profiling of some dry fruits

Muhammad, Haji; Tahiri, Iftikhar Ahmad; Qasim, Muhammad; Versiani, Muhammad Ali; Hanif, Muddasir; Gul, Bilquees; Ali, Syed Tahir; Ahmed, Safeer

doi:10.1007/s00706-019-02441-3

Cited by 4 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Relevant examples include the study of caffeic acid [57], vanillin [58], tannins [59], piperine [60] and vitamins [61]. However, CV has been also used to characterize more complex samples, such as coffee extracts [62], wines [56,[63][64][65][66][67], beverages (teas, coffees, fruit juices) [56,68,69], sesame oil [70], algae [71,72], fruit juices [73], propolis [74,75], fruit infusions [76], seaweeds [77], mango fruit [78], dry herbal extract [79], kiwifruit [80], wild bilberry extract [81], berry fruits [82], apple flesh and peel [83], grape [84], medicinal plant and leave extract [85][86][87][88], ginger species [89,90], dried fruit extracts [91], bee products [92,93], amaranth flower and leave extract [94] and by-products (seed, stems, and pomace) [95].…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Electrochemical Methods to Evaluate the Antioxidant Activity and Capacity of Foods: A Review

et al. 2021

View full text Add to dashboard Cite

Antioxidants are an important class of food additives playing the fundamental role of retarding oxidation reactions in food. Although their functional role is well‐established, less clear is their mechanism of action. Electrochemical methods based on cyclic, differential pulse, square wave voltammetry and coulometry allow direct and rapid screening of antioxidant activity. Their main advantages are sensitivity, rapidity, simplicity and the capacity to directly measure the number of electrons transferred by an antioxidant offer advantage over conventional spectrophotometric assays. This review aims to summarize the most recent efforts towards the use of electrochemical methods to evaluate the antioxidant activity of foods.

show abstract

Section: Cyclic Voltammetrymentioning

confidence: 99%

Electrochemical Methods to Evaluate the Antioxidant Activity and Capacity of Foods: A Review

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In recent years, these methods have emerged as a promising alternative to conventional spectrophotometric and fluorimetric methods in determining the capacity of antioxidants (food, beverage, and photochemical extract). This is due to several advantages when compared to other methods, such as high sensitivity, good selectivity, rapidity, simplicity, use of portable equipment, and a low cost and consumption of reagents, which implies a lower environmental impact (Biochem et al, 2011;Muhammad et al, 2019;Tyurin et al, 2015).…”

Section: Electrochemical Techniquesmentioning

confidence: 99%

“…These methods offer a large number of ways for analysis, which are classified according to the electrical properties used for quantification of the analyte; among them can be mentioned: Potentiometry (measurement of potential generated by changing the concentration of a species in an electrochemical cell); coulometry (measurement of the amount of charge consumed for the conversion (oxidation or reduction) of a given species); and voltammetry/amperometry (measurement of the current generated by oxidation or reduction reaction of a chemical species on the surface of an electrode) (Muhammad et al, 2019).…”

Section: Electrochemical Techniquesmentioning

confidence: 99%

Assessment of natural and pyrolytic antioxidants as additives to biodiesel production

Falconí Heredia

View full text Add to dashboard Cite

Brazil is one of the largest producers and consumers of biodiesel in the world, with a production of 6.7 million m 3 in 2021. Its main sources for biodiesel production are soybean oil and animal fat. The low oxidative stability of biodiesel is a problem that has not yet been satisfactorily solved and represents the main barrier to market expansion. Therefore, a promising approach to improve oxidative stability is the addition of antioxidants. This study evaluated the effect and performance of natural extracts of Scenedesmus obliquus (S. obliquus), Haematococcus pluvialis (H. pluvialis), curcuma sp. (turmeric), Bixa Orellana (annatto) seeds, coffee husk (C. husk), and commercial Haematococcus pluvialis (C.H. pluvialis) as antioxidants during long-term storage of biodiesel matrices from soybean (Glycine max), canola (Brassica napus), and macauba (Acrocomia aculeata). In addition, the antioxidant properties of bio-oils produced from the slow pyrolysis of biodiesel synthesis of soybean, canola, macauba, and depigmented S. obliquus biomass were also investigated. Among the natural extracts, turmeric and S. obliquus stood out, which at the concentration of 3000 ppm produced increased stability time (35.0% for soybean, 51.8% for canola, and 338.4% for macauba) and (36.0% for soybean, 46.7% for canola, and 122.0% for macauba) respectively. Furthermore, the addition of S. obliquus bio-oil at a concentration of 4000 ppm produced an increase in stability time of 116.8 % (13.2 h) for soybean, 194.5% (17.7 h) for canola, and 563.5% (13.21 h) for macauba, which meets the Brazilian standard requirement (ANP resolution no. 798/219) of a minimum stability time of 12 hours for biodiesel. Keywords: Biodiesel. Catalysis. Natural antioxidants. Microalgae. Oxidation stability. Pyrolysis antioxidant

show abstract

Antioxidant and antimicrobial activities of Ixora coccinea root and quantification of phenolic compounds using HPLC

Muhammad

Qasim

Ikram

et al. 2020

South African Journal of Botany

View full text Add to dashboard Cite

Electrochemical determination of antioxidant activity and HPLC profiling of some dry fruits

Cited by 4 publications

References 37 publications

Electrochemical Methods to Evaluate the Antioxidant Activity and Capacity of Foods: A Review

Electrochemical Methods to Evaluate the Antioxidant Activity and Capacity of Foods: A Review

Assessment of natural and pyrolytic antioxidants as additives to biodiesel production

Antioxidant and antimicrobial activities of Ixora coccinea root and quantification of phenolic compounds using HPLC

Contact Info

Product

Resources

About