Flavor and oxidative stability of soybean, sunflower and low erucic acid rapeseed oils

Warner, K.; Frankel, E. N.; Mounts, T. L.

doi:10.1007/bf02885448

Cited by 98 publications

(51 citation statements)

References 20 publications

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“…The flavor intensity scores correspond with the levels of hexanal measured in each of the oils following completion of storage under both the light and dark conditions (Table 2). Total volatile and hexanal contents have been correlated with sensory evaluation of other oils (18). Recently, a significant correlation was found between undesirable sensory scores and the total amount of volatile compounds isolated by SPME (19).…”

Section: Resultsmentioning

confidence: 98%

Oxidative stability of walnut oils extracted with supercritical carbon dioxide

Crowe

White

2003

J Americ Oil Chem Soc

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Supercritical carbon dioxide (SC‐CO2) was used to partially defat walnuts, and the oxidative stability of the extracted walnut oils was assessed. The SC‐CO2‐extracted oils were less stable during accelerated storage in the dark than was pressed walnut oil, as determined by PV, headspace analysis by solid‐phase microextraction, and sensory methods. The SC‐CO2‐extracted oils, however, exhibited greater photo‐oxidative stability than did pressed walnut oil by all of these methods, possibly because of the presence of chlorophyll in the pressed oil. Oxidative stability indices and tocopherol contents were significantly lower in the SC‐CO2‐extracted oils than in pressed oil.

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Section: Resultsmentioning

confidence: 98%

Oxidative stability of walnut oils extracted with supercritical carbon dioxide

Crowe

White

2003

J Americ Oil Chem Soc

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“…Entretanto, foi observado por Malcolmson et al 45 e Warner et al 46 que não existe padronização para o teste em estufa. São empregados recipientes diferentes, o que implicaria em diferentes áreas de exposição ao ar.…”

Section: Resultsunclassified

Avaliação da estabilidade oxidativa de biodiesel de óleo de girassol com antioxidantes

Ferrari¹,

Souza²

2009

Quím. Nova

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Recebido em 30/1/08; aceito em 15/7/08; publicado na web em 5/12/08 EVALUATION OF OXIDATION STABILITY OF SUNFLOWER OIL BIODIESEL WITH ANTIOXIDANTS. Biodiesel can contain unsaturated fatty acids, which are susceptible to oxidation, being able to change into polymerized compounds. In this work biodiesel was characterized according to physical-chemistry parameters and the antioxidant activity of butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and tert-butylhydroquinone (TBHQ) added to biofuel was analyzed. Biodiesel was submitted to accelerate oxidation in the Schaal oven test, and peroxide value was analyzed.The absorptivity values at 232 nm and 270 nm and oxidative stability in Rancimat ® were determined. It was observed that TBHQ presented superior antioxidant activity than BHT and BHA. Keywords: energy; peroxidation; lipid oxidation. introdUçãoDentre os complexos com grandes potenciais de crescimento está inserido aquele relacionado com a exploração do girassol. Isso porque, a priori, pode-se inferir que no Brasil a produção, o processamento e o consumo da oleaginosa, bem como dos seus principais derivados (óleo e farelo) estão muito abaixo do potencial.1 O girassol é uma cultura que apresenta características desejáveis sob o ponto de vista agronômico, como ciclo curto, elevada qualidade e bom rendimento em óleo, 2 que fazem dela uma boa opção aos produtores brasileiros.Os desafios que o girassol enfrenta no Brasil são basicamente três: oferecer aos produtores uma cultura alternativa que, em caráter complementar, possibilite uma segunda colheita, sobre a mesma área e mesmo ano agrícola; oferecer mais uma matéria-prima oleaginosa às indústrias de processamento de outros grãos, reduzindo sua ociosidade e, finalmente, oferecer ao mercado um óleo comestível de alto valor nutritivo.3 Junta-se a esses desafios a alternativa atual da produção de energia, já que o óleo de girassol pode ser utilizado como matéria-prima para produção de biodiesel. 1 O biodiesel não polui o meio ambiente e também traz vantagens econômicas, pois sua produção e o cultivo de matérias-primas contribuirão para a criação de milhares de novos empregos na agricultura familiar, principalmente nas regiões mais pobres do Brasil. 4 Biodiesel pode ser obtido de fontes renováveis, como óleos vegetais, através de processo de transesterificação, 5,6 no qual ocorre a conversão de triglicerídeos em ésteres de ácidos graxos.7 A maior parte do biodiesel produzido no mundo deriva dos óleos de soja e canola, 8 porém, segundo Parente, 9 todos os óleos vegetais podem ser transformados em biodiesel. Dentre estes, o óleo de girassol destaca-se por suas excelentes características físico-químicas, cuja produção da oleaginosa está entre as maiores culturas do mundo, 10 apresentando viabilidade técnico-ambiental na produção de biocombustíveis. 11O perfil de ácidos graxos dos óleos e gorduras favorece o desenvolvimento da rancidez oxidativa devido à quantidade de ácidos graxos insaturados, principalmente os ácidos oléico (C18:1), linoléico (C18:2) e l...

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“…Static headspace analysis of volatile compounds was used as a method for monitoring oxidative stability of various oils in which total volatiles peak areas were measured (Warner et al 1989). Automated static headspace is a common extraction technique in oil production plants, where it is used for both the residue extraction solvent analysis and volatile compounds in oils.…”

Section: Resultsmentioning

confidence: 99%

Static Headspace Extraction with Compounds Trapping for the Analysis of Volatile Lipid Oxidation Products

2017

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Static headspace is an easy to perform, convenient, and usually automated method for extraction of volatiles from various food matrices. Among other applications, it is used also for monitoring of volatile lipid oxidation products. However, the biggest disadvantage of this method is its low sensitivity especially when compared to such techniques as solid-phase microextraction or dynamic headspace. This paper focuses on the comparison of static headspace analysis of volatile lipid oxidation products with a modification of this technique, where volatiles extracted multiple times from oil matrix in a headspace vial are trapped on Tenax trap and subsequently desorbed into gas chromatograph. Twenty volatile compounds (mainly alkanals, 2-alkenals, ketones, and alcohols being volatile lipid oxidation products) in rapeseed oil were used for method comparison. For all compounds, a significant increase in method sensitivity and improvement of limits of detection (10 to 33 times) depending on the compound were noted; however, the repeatability was worse (for 16 out of 20 compounds) and carry-over values (also 16/20) were higher for combined headspace/trapping method.

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Flavor and oxidative stability of soybean, sunflower and low erucic acid rapeseed oils

Cited by 98 publications

References 20 publications

Oxidative stability of walnut oils extracted with supercritical carbon dioxide

Oxidative stability of walnut oils extracted with supercritical carbon dioxide

Avaliação da estabilidade oxidativa de biodiesel de óleo de girassol com antioxidantes

Static Headspace Extraction with Compounds Trapping for the Analysis of Volatile Lipid Oxidation Products

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