Electroanalytical determination of TBHQ, a synthetic antioxidant, in soybean biodiesel samples

Araújo, Tatiane Alfonso de; Barbosa, Antonio Marcos Jacques; Viana, Luíz Henrique; Ferreira, Valdir Souza

doi:10.1016/j.fuel.2010.09.022

Cited by 59 publications

(22 citation statements)

References 31 publications

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“…The acceptable daily intake (ADI) of TBHQ is 0-0.2 mg/kg body weight (Nanditha & Prabhasankar, 2009;Shahidi & Wanasundara, 1992). Recent studies suggest that addition of TBHQ could prevent biodiesel oxidation and increase the storage time (De Araujo, Barbosa, Viana, & Ferreira, 2011;Goulart, Teixeira, Ramalho, Terezo, & Castilho, 2014).…”

Section: Tertiary-butylhydroquinone (Tbhq)mentioning

confidence: 99%

Phenolics and polyphenolics in foods, beverages and spices: Antioxidant activity and health effects – A review

Shahidi

Ambigaipalan

2015

Journal of Functional Foods

2,240

1,342

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Available online A B S T R A C TThis review reports on the latest research results and applications of phenolic and polyphenolic compounds. Phenolic compounds, ubiquitous in plants, are an essential part of the human diet and are of considerable interest due to their antioxidant properties and potential beneficial health effects. These compounds range structurally from a simple phenolic molecule to complex high-molecular-weight polymers. There is increasing evidence that consumption of a variety of phenolic compounds present in foods may lower the risk of health disorders because of their antioxidant activity. When added to foods, antioxidants control rancidity development, retard the formation of toxic oxidation products, maintain nutritional quality, and extend the shelf-life of products. Due to safety concerns and limitation on the use of synthetic antioxidants, natural antioxidants obtained from edible materials, edible by-products and residual sources have been of increasing interest. This contribution summarizes both the synthetic and natural phenolic antioxidants, emphasizing their mode of action, health effects, degradation products and toxicology. In addition, sources of phenolic antioxidants are discussed in detail.

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Section: Tertiary-butylhydroquinone (Tbhq)mentioning

confidence: 99%

Phenolics and polyphenolics in foods, beverages and spices: Antioxidant activity and health effects – A review

Shahidi

Ambigaipalan

2015

Journal of Functional Foods

2,240

1,342

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“…The sensitivity of biodiesel to oxidation is variable, depending on the raw material used, presence of naturally occurring antioxidants, and storage conditions, such as exposure to atmospheric oxygen, daylight, contaminants (metals that speed up oxidation), and high temperatures 5. One procedure for increasing the oxidative stability of biodiesel entails the addition of antioxidants 6, 7, 8. Although oxidation cannot be prevented entirely, it can be significantly slowed down by the use of such compounds 9.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Sn‐Beta with Exclusive and High Framework Sn Content

et al. 2015

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Sn‐Beta zeolite was prepared by acid dealumination of Beta zeolite, followed by dehydration and impregnation with anhydrous SnCl4. The formation of extraframework Sn (EFSn) species was prevented by the removal of unreacted SnCl4 in a methanol washing step prior to calcination. The resulting Sn‐Beta zeolites were characterized by X‐ray diffraction, Ar physisorption, NMR, UV/Vis, and FTIR spectroscopy. These well‐defined Lewis acid zeolites exhibit good catalytic activity and selectivity in the conversion of 1,3‐dihydroxyacetone to methyl lactate. Their performance is similar to a reference Sn‐Beta zeolite prepared by hydrothermal synthesis. Sn‐BEA zeolites that contain EFSn species exhibit lower catalytic activity; the EFSn species also catalyze formation of byproducts. DFT calculations show that partially hydrolyzed framework Sn‐OH species (open sites), rather than the tetrahedral framework Sn sites (closed sites), are the most likely candidate active sites for methyl lactate formation.

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“…A detection limit (LD) of 100 nmol L −1 was determined using the equation LD = 3 σ bl / slope, where σ bl is the standard deviation of the blank response which is obtained from 10 replicate measurements of the blank solution and slope is the slope of the analytical curve. The linear range of response and limit of detection were analyzed in comparison to electrochemical sensors to TBHQ reported in the literature (Table 1) [37][38][39][40][41][42][43][44]. As can be seen, the LiTCNE/TiO 2 photoelectrochemical sensor shows a linear range of response about of three magnitude orders and a limit of detection of 100 nmol L − 1 , which is comparable to the best electrochemical sensors to TBHQ.…”

Section: Optimization Of the Litcne/tio 2 Photoelectrochemical Sensormentioning

confidence: 81%

Development of a photoelectrochemical sensor for detection of TBHQ antioxidant based on LiTCNE-TiO2 composite under visible LED light

Monteiro

Neto

Damos

et al. 2016

Journal of Electroanalytical Chemistry

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Electroanalytical determination of TBHQ, a synthetic antioxidant, in soybean biodiesel samples

Cited by 59 publications

References 31 publications

Phenolics and polyphenolics in foods, beverages and spices: Antioxidant activity and health effects – A review

Phenolics and polyphenolics in foods, beverages and spices: Antioxidant activity and health effects – A review

Synthesis of Sn‐Beta with Exclusive and High Framework Sn Content

Development of a photoelectrochemical sensor for detection of TBHQ antioxidant based on LiTCNE-TiO2 composite under visible LED light

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