Results 311 to 320 of about 439,654 (354)

Hydrogen and oxygen isotope values in hydrogen peroxide

Rapid Communications in Mass Spectrometry, 2011
Hydrogen peroxide (H 2 O 2 ) is a widely used oxidizer with many commercial applications; unfortunately, it also has terrorist‐related uses. We analyzed 97 hydrogen peroxide solutions representing four grades purchased across the United States and in ...
Janet E, Barnette, Michael J, Lott, John D, Howa, David W, Podlesak, James R, Ehleringer   +4 more
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Peroxide value determination—Comparison of some methods

Journal of the American Oil Chemists' Society, 1974
AbstractA comparison between the determination of the peroxide value by the methods of Wheeler and Sully (iodometric titration) and that of Stine, et al. (ferric thiocyanate method) was made. Some oxidized vegetable oils, H2O2, t‐butyl hydroperoxide, cumene hydroperoxide, methyl oleate hydroperoxides, and methyl linoleate hydroperoxides were used as ...
G. Barthel, W. Grosch
openaire   +1 more source

Comparison of Peroxide Value Methods Used for Semihard Cheeses

Journal of Agricultural and Food Chemistry, 2002
The objective was to evaluate alternatives to the peroxide value method of choice in the dairy industry, the method issued by the International Dairy Federation. Furthermore, the study evaluated the feasibility of alternative solvents for extracting lipids and subsequent peroxide value determinations.
Mortensen, G, Sørensen, J., Stapelfeldt, H.   +2 more
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Increased levels of lipid peroxides in aged rat brain as revealed by direct assay of peroxide values

Neuroscience Letters, 1990
Lipid peroxide concentrations in brain tissues of young and aged rats were determined by a direct method for measuring peroxide values. Three different brain regions were analyzed for lipid peroxides. The peroxide levels increased in all three regions of aged as compared to those of young rats, while lipid peroxides in plasma appeared to be stable ...
S, Ando, K, Kon, K, Aino, Y, Totani
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Semiautomated Thiocyanate Method for Determining Peroxide Values of Lipids

Journal of Food Science, 1969
SUMMARY– A liquid‐flow semiautomated ferrous thiocyanate procedure, designed for use in monitoring peroxide values of extracted oils, is presented. Twenty samples per hour can be measured by means of a system using conventional manifold tubing and AutoAnalyzer components.
J. A. STARKOVICH, W. T. ROUBAL
openaire   +1 more source

Redox-potentiometric determination of peroxide value in edible oils without titration

Talanta, 2001
Standard methods for peroxide value determination in edible oils, which are based on KI oxidation by the hydroperoxides and volumetric titration of the liberated iodine, have been improved using redox-potentiometric iodine determination without titration.
E, Kardash-Strochkova, Y I, Tur'yan, I, Kuselman   +2 more
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Lipid peroxidation markers in Crohn’s disease: the associations and diagnostic value

Clinical Chemistry and Laboratory Medicine, 2012
Crohn's disease (CD) is an incurable and difficult to diagnose condition. While high sensitive C-reactive protein (CRP) remains the best biochemical marker, we evaluated the diagnostic usefulness of lipid peroxidation indices.Malondialdehyde/thiobarbituric acid-reactive substances (MDA/TBARS), peroxidation potential (PP), lipid hydroperoxides (ROOH ...
Dorota, Boehm, Malgorzata, Krzystek-Korpacka, Katarzyna, Neubauer, Malgorzata, Matusiewicz, Leszek, Paradowski, Andrzej, Gamian   +5 more
openaire   +2 more sources

Determination of peroxide value by fourier transform near‐infrared spectroscopy

Journal of the American Oil Chemists' Society, 2000
AbstractA Fourier transform‐near infrared (FT‐NIR) method originally designed to determine the peroxide value (PV) of triacylglycerols at levels of 10–100 PV was improved upon to allow for the analysis of PV between 0 and 10 PV, a range of interest to the edible oil industry. The FT‐NIR method uses convenient disposable glass vials for sample handling,
Hui Li, F. R. van de Voort, A. A. Ismail, R. Cox   +3 more
openaire   +1 more source

The determination of peroxide value by fourier transform infrared spectroscopy

Journal of the American Oil Chemists' Society, 1994
AbstractA rapid method for the quantitative determination of peroxide value (PV) of vegetable oils by Fourier transform infrared (FTIR) transmission spectroscopy is described. Calibration standards were prepared by the addition oft‐butyl hydroperoxide to a series of vegetable oils, along with random amounts of oleic acid and water. Additional standards
F. R. van de Voort, A. A. Ismail, J. Sedman, J. Dubois, T. Nicodemo   +4 more
openaire   +1 more source