determination of antioxidants in vegetable insulating oils

determination of antioxidants in vegetable insulating oils by

Determination of antioxidants in vegetable insulating oils by

Vegetable insulating oils (VIOs) have attracted wide attention for their high flash point, high insulation performance and degradability. However, the unsaturated fatty acids contained in VIOs redu

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determination of antioxidants in vegetable insulating oils by

Determination of antioxidants in vegetable insulating oils by

Vegetable insulating oils (VIOs) have attracted wide attention for their high flash point, high insulation performance and degradability. However, the unsaturated fatty acids contained in VIOs reduce their oxidation stability, which requires the addition of some antioxidants to ensure their usage.

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determination of antioxidants in vegetable insulating oils by

Determination of antioxidants in vegetable insulating oils by

Determination of antioxidants in vegetable insulating oils by HPLC Yuan Fang , Yunbai Luo , and Ping Yu Citation: Journal of Renewable and Sustainable Energy 8 , 033103 (2016); doi: 10.1063/1.4954235

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determination of antioxidants in vegetable insulating oils by

Determination of antioxidants in vegetable insulating oils by

Determination of antioxidants in vegetable insulating oils by HPLC Yuan Fang, Yunbai Luo, and Ping Yu Citation: Journal of Renewable and Sustainable Energy 8, 033103 (2016); doi: 10.1063/1.4954235

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determination of antioxidant content in insulating oils

DETERMINATION OF ANTIOXIDANT CONTENT IN INSULATING OILS

0.5% weight fraction were prepared in a similar way with the use of spent electrical insulating oil free of the antioxidant. For the development of DBPC determination procedure samples were prepared by mixing the pressure oil with analyte of unknown concentration and the same pressure oil with the antioxidant added.

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determination of antioxidants in mixed insulating oil by

Determination of Antioxidants in Mixed Insulating Oil by

Home Conferences ICITEE Proceedings ICITEE2020 Determination of Antioxidants in Mixed Insulating Oil by Liquid Chromatography. short-paper . Determination of

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agilent 5500, 4500, and cary 630 ftir spectrometers

Agilent 5500, 4500, and Cary 630 FTIR Spectrometers

Determination of Phenolic Antioxidant DBPC and DBP Levels in Electrical Insulating Oil Agilent 5500, 4500, and Cary 630 FTIR Spectrometers Authors Dipak Mainali and Frank Higgins Agilent Technologies, Inc. Application Note Introduction The phenolic antioxidants 2,6-ditertiary-butyl paracresol (DBPC) (also known as

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study of compatibility and oxidation stability of vegetable

Study of Compatibility and Oxidation Stability of Vegetable

The determination of the induction period for several vegetable insulating oils from the local market by using Rancimat was carried out according to BS EN 14112 standard, at different temperatures (110, 120, and 130 °C). Also, the compatibility of vegetable oil was assessed according to ASTM and ABNT NBR standards.

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determination of antioxidant capacities of vegetable oils by

Determination of antioxidant capacities of vegetable oils by

Two ferric-ion-based total antioxidant capacity methods: 1,10-phenanthroline (Phen) and ferric reducing antioxidant power (FRAP) were used for determination of antioxidant capacities (AC) of the acetonic and methanolic extracts of vegetable oils. The obtained mean Phen and FRAP values for acetonic extracts of olive oils, rapeseed, rice and four

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determination of antioxidants in mixed insulating oil by

Determination of Antioxidants in Mixed Insulating Oil by

Home Conferences ICITEE Proceedings ICITEE2020 Determination of Antioxidants in Mixed Insulating Oil by Liquid Chromatography. short-paper . Determination of

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simultaneous determination of five synthetic antioxidants in

Simultaneous determination of five synthetic antioxidants in

Simultaneous determination of five synthetic antioxidants in edible vegetable oil by GC-MS. Guo L(1), Xie MY, Yan AP, Wan YQ, Wu YM. Author information: (1)Key Laboratory of Food Science of Ministry of Education, Nanchang University, Nanchang, 330047, People's Republic of China.

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simultaneous determination of passivator and antioxidant

Simultaneous Determination of Passivator and Antioxidant

For the first time the simultaneous determination of antioxidants and passivators most frequently added to mineral insulating oils is provided. The compounds investigated included three inhibitors (N-phenyl-1-naphthylamine, 2,6-di-tert-butylphenol, and 2,6-di-tert-butyl-p-cresol) and two passivators (benzotriazole and Irgamet 39).

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investigation of electrical properties of eco-friendly

Investigation of electrical properties of eco-friendly

The enhancement of physical and chemical properties of vegetable oil and its insulation nature enriched with antioxidants was studied by the researchers Dung and Huong 2020. The auto-oxidation effect is observed in vegetable oil at higher concentration of TBHQ and hence the viscosity increases.

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determination of antioxidant compounds and antioxidant

Determination of antioxidant compounds and antioxidant

In fact, maize and soya oils show the highest TEAC value, and they also have the highest tocopherol contents, but not of squalene or chlorophyll. Olive oil, in spite of the elevated content of phenolic substances and squalene, does not show a particularly high TEAC value. Maize oil shows the highest antioxidant activity for oil, HF and LF.

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thermo-oxidative stability of mineral naphthenic insulating

Thermo-Oxidative Stability of Mineral Naphthenic Insulating

Investigations of a mechanically failed cable insulation used in indoor conditions By Radu Setnescu A rapid method for evaluation of the oxidation stability of castor oil FAME: influence of antioxidant type and concentration

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(pdf) determination of hydroperoxide content in complex

(PDF) Determination of Hydroperoxide Content in Complex

mineral oils and vegetable oils used for electrical insulation production of electrical insulating oil. 23 A copper spiral In order to investigate such possible antioxidant activity, a

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determination of tert-butylhydroquinone in vegetable oils

Determination of tert-butylhydroquinone in vegetable oils

Abstract. Monitoring the level of tert-butylhydroquinone (TBHQ), a permissible antioxidant additive in edible vegetable oils in many countries, is important to ensure that oils and products that contain them comply with the relevant import regulations. Surface-enhanced Raman spectroscopy (SERS) technology coupled with chemometric methods

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simultaneous determination of five synthetic antioxidants in

Simultaneous determination of five synthetic antioxidants in

A simple, quick and nontoxic analytical method for the simultaneous determination of five synthetic antioxidants [t-butyl-4-hydroxyanisole (BHA), 2,6-di-t-butyl-hydroxytoluene (BHT), t-butyl hydroquinone (TBHQ), ethoxyquin (EQ) and 2,6-di-tert-butyl-4-hydroxymethyl-phenol (Ionox 100)] in edible vegetable oil has been developed. The analytes were extracted by ethanol, then separated and

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effect of antioxidants on critical properties of natural

Effect of antioxidants on critical properties of natural

The performances of natural esters without and with antioxidants are examined according to the international standards. From the investigation results, it is found that the natural esters based vegetable oils without and with antioxidants have the potential to replace the mineral oil as the insulating medium in the transformers.

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accelerated shelf life determination of antioxidant

Accelerated Shelf Life Determination of Antioxidant

Accelerated Shelf Life Determination of Antioxidant Stabilized High Oleic Sunflower and Canola Oils In Plastic Bottles Christine Nicole Shearer Department of Nutrition, Dietetics, and Food Science Master of Science . Vegetable oil is an important commodity; however, the majority of commercially available vegetable oils

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is 13631: method of test for detection and determination of

IS 13631: Method of Test for Detection and Determination of

Title of Legally Binding Document: Method of Test for Detection and Determination of Antioxidant Additives in Insulating Oils Number of Amendments: 1 Equivalence: IEC 60666 Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New--Jawaharlal Nehru Invent a new India using knowledge.--Satyanarayan Gangaram Pitroda

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ultrafast analysis of synthetic antioxidants in vegetable

Ultrafast analysis of synthetic antioxidants in vegetable

developed for the determination of antioxidants in vegetable oils. The analysis time could be reduced to less than 2 min with a backpressure of 1120 bar. The performance of the high throughput method (repeatability, lin-earity, detection limits) was investigat-ed using standard solutions. Oil sam-

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study of compatibility and oxidation stability of vegetable

Study of Compatibility and Oxidation Stability of Vegetable

Both insulating fluids, mineral and vegetable oils, need to be tested periodically according to specific standards. Oxidation stability can be determined by the induction period measured by conductivity method (Rancimat) by monitoring the effectivity of oil’s antioxidant additives, a methodology already developed for food application and

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enhancing oxidative stability and shelf life of frying oils

Enhancing oxidative stability and shelf life of frying oils

Tocopherols, the most widely dispersed antioxidants in nature, represent the primary antioxidants in vegetable oils. Tocopherols exert their utmost antioxidant activity when they are present at relatively low levels in vegetable oils. At very high concentrations, they may behave as pro-oxidants.

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