Determination of acid values of fats and oils by flow injection analysis with electrochemical detection

Fuse, Tetsuo; Kusu, Fumiyo; Takamura, Kiyoko

doi:10.1016/s0731-7085(97)00039-3

Cited by 17 publications

(9 citation statements)

References 2 publications

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“…The cholesterol content and acid value of the control cod liver oil were 554.51 mg/100 g cod liver oil and 0.42 (data not shown). The finding on the acid value of cod liver oil was consistent with Fuse et al [25], who reported the acid value (0.45) of cod liver oil determined by a conventional titration using phenolphthalein as an indicator. In the present study, after mixing cod liver oil with crosslinked b-CD (15-30%, w/v) at 50°C for 20 min, the acid values of the oil slightly increased from 0.42 to 0.56.…”

Section: Resultssupporting

confidence: 91%

Optimization of the Conditions for Removing Cholesterol from Cod Liver Oil by β‐Cyclodextrin Crosslinked with Adipic Acid

Chang

Lee

Kwak

2010

J Americ Oil Chem Soc

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This study was conducted to find the optimum conditions for b-cyclodextrin (b-CD) crosslinked by adipic acid to remove cholesterol from cod liver oil. The cholesterol content of the non-treated cod liver oil was 554.51 mg/100 g oil. The different factors considered were concentrations of crosslinked b-CD, mixing temperature, ratio of cod liver oil to distilled water, mixing time, and mixing speed. The optimum conditions for cholesterol removal from cod liver oil using crosslinked b-CD were a 1:2 ratio of cod liver oil to distilled water, 25% (crosslinked b-CD/distilled water, w/v) crosslinked b-CD concentration, 20 min mixing time, 400 rpm mixing speed and 60°C mixing temperature with about 87% cholesterol removal. In a recycling study, cholesterol removal from the cod liver oil with recycled crosslinked b-CD in the first recycling trial was 85.09%, which was slightly lower than that with new crosslinked b-CD (87.27%). Up to three time trials, more than 82% cholesterol removal was observed.

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Section: Resultssupporting

confidence: 91%

Optimization of the Conditions for Removing Cholesterol from Cod Liver Oil by β‐Cyclodextrin Crosslinked with Adipic Acid

Chang

Lee

Kwak

2010

J Americ Oil Chem Soc

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“…In all samples the AV peaked quickly (within ~12 h), maintained this high value for 12 h and then declined within the next 12 h. After this period it remained relatively constant until the end of the incubation (~72 h). Generally, reports have indicated that the AV of an oil increases with increasing levels of free fatty acids due to triglyceride hydrolysis; typically after long storage of oil or oil-rich products (Fuse, Kusu, & Takamura, 1997;Yuan, Liu, Ma, Zhu, Liu, & Na, 2006). However, it has also been reported that AV can decrease in the later periods of storage after initially rising in earlier storage period (Guo, Bai, Jiang, Shao, Wang, & He, 2009;Wang, Huang, & Wang, 2010;Ding, & Fei, 2011).…”

Section: Oxidative Stability Of Bkomentioning

confidence: 99%

Fatty acid profile, oxidative stability and toxicological safety of bayberry kernel oil

Xia

Pan

Zheng

et al. 2013

Food and Chemical Toxicology

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The fatty acid profile, oxidative stability and toxicological safety of bayberry (Myrica rubra Sieb. et Zucc.) kernel oil (BKO) extracted by supercritical carbon dioxide (SC-CO₂) and solvent of diethyl ether were assessed. Fatty acid profile was determined by gas chromatography, oxidative stability by placing the sample of 25g in a blast oven at 50±1°C to accelerate oxidation and toxicological safety by bacterial reverse mutation (Ames test) and acute oral toxicity in mice. The results demonstrated that in comparison to lard and rapeseed oil, the peroxide values of BKO were higher but the acid values were similar during the incubation test. The Ames test demonstrated no mutagenicity and no obvious acute toxicity were observed, suggesting that the BKO has potential as a novel edible oil.

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“…The advantages of flow techniques, such as versatility, simplicity and low cost, make these procedures an excellent choice for the analysis of edible oils because it becomes possible to perform analyses in organic media with low liquid waste, in a short period of time and with very high precision [4]. Several FI methodologies are available in the literature for the determination of polyphenols [17][18][19], sterols [20], peroxides [21][22][23], hydroperoxides [24,25] free fatty acids [26][27][28][29], anisidine value [30], and iodine value [31] in edible oils. Some of these methodologies consume large reagent and sample volumes, require a long time to complete the analyses and in these studies, the oil samples are injected after being pre-diluted and homogenized with appropriate solvents [32,33].…”

Section: Introductionmentioning

confidence: 99%

A Highly Efficient Automated Flow Injection Method for Rapid Determination of Free Fatty Acid Content in Corn Oils

Ayyıldız

Kara

2014

J Americ Oil Chem Soc

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In the present study, a new flow injection (FI) methodology for determination of free fatty acid (FFA) content in corn oil samples is proposed. The proposed method is based on monitoring the absorbance changes at 580 nm, k max , as a result of neutralization of FFA in oil samples by KOH in the reagent. The analyses were performed with a single-line FI manifold system created by modification of high performance liquid chromatography. The main parameters, such as sample and reagent volumes, reaction coil, reagent concentration and temperature were all optimized. With the newly developed sampling strategy, the oil sample and reagent at micro level were directly injected together without any pre-treatment. The proposed flow injection analysis method was validated statistically and it was found to be linear (between 0.09 and 1.50 FFA %), accurate (recovery 87.19-122.22 %), and precise (relative standard deviation \1 % for both intra-day and inter-day precision). The limit of detection and limit of quantification were found to be 7.41 9 10 -3 and 2.24 9 10 -2 oleic acid %, respectively. The results were also compared with those obtained by the American Oil Chemists Society (Ca-5a-40) method using statistical t and F tests, and a significant difference was not observed between the methods at the 95 % confidence level. These results strongly suggest that this method is suitable for automated routine analysis of FFA in edible oils due to its simplicity, reliability, speed, and economy of solvents and sample.

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Determination of acid values of fats and oils by flow injection analysis with electrochemical detection

Cited by 17 publications

References 2 publications

Optimization of the Conditions for Removing Cholesterol from Cod Liver Oil by β‐Cyclodextrin Crosslinked with Adipic Acid

Optimization of the Conditions for Removing Cholesterol from Cod Liver Oil by β‐Cyclodextrin Crosslinked with Adipic Acid

Fatty acid profile, oxidative stability and toxicological safety of bayberry kernel oil

A Highly Efficient Automated Flow Injection Method for Rapid Determination of Free Fatty Acid Content in Corn Oils

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