Determination of Peroxides in Synthetic Rubbers

Robey, Richard F.; Wiese, Herbert K.

doi:10.1021/i560143a006

Cited by 15 publications

(6 citation statements)

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“…The method has also been used in the estimation of peroxides in rubber. Bolland et al (3) developed a calorimetric method using benzenemethanol as a solvent, and more recently Robey and Weise (4) have reported that a solvent composed of 20% ethanol in cholorform was more satisfactory for this purpose.…”

Section: Introductionmentioning

confidence: 99%

The estimation of peroxides in fats and oils by the ferric thiocyanate method

Chapman¹,

Mackay²

1949

J Americ Oil Chem Soc

229

135

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Conclusions All modifiactions of the ferric thiocyanate method investigated were affected by atmospheric oxygen. However, the interference in the Hills and Thiel (7) method and the Bolland (3) procedure was not as great as in the Lips, Chapman, and McFarlane (5) method. The results of Lea (8) were confirmed in respect to the lower values obtained when the atmosphere was rigorously excluded. Minimal results by the ferric thiocyanate procedure were possible only when carefully purified nitrogen was employed, and all possible precautions to prevent contact with air were observed. No other satisfactory method for offsetting this interference was found. When the ferric thiocyanate procedures are conducted in the presence of air, the results, while high, are proportional to the iodimetric values. The former method, however, is much more sensitive than iodimetric procedures. Therefore under conditions where only comparative results are desired, such as in the assessment of the activity of antioxidants or in accelerated tests to predict the stability of a fat or oil, the ferric thiocyanate method should prove of considerable value. The Hills and Thiel (7) method was found to be the most satisfactory of those investigated since the use of benzene‐methanol as a solvent permits the use of larger samples and the reagents are considerably more stable than in other methods.

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Section: Introductionmentioning

confidence: 99%

The estimation of peroxides in fats and oils by the ferric thiocyanate method

Chapman¹,

Mackay²

1949

J Americ Oil Chem Soc

229

135

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“…Assay of irradiation products. Lipid peroxides were measured by the modified KCNS method (Robey and Wiese. 1945).…”

Section: Methodsmentioning

confidence: 99%

A Biochemical Screening Test for the Photosensitizing Potential of Drugs and Disinfectants

Schothorst

Suurmond

Lijster

1979

Photochem & Photobiology

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A series of photosensitizers known to cause photodermatitis were tested with respect to photosensitizing properties. Irradiation of these sensitizers together with unsaturated fatty acids or amino acids showed that few of them can be transformed by most of the photosensitizers. SH groups can. however, be destroyed by most of the photosensitizers known in dermatological practice. At low photosensitizer-to-SH group ratios, GSSG is formed; at higher ratios, other transformations of GSH predominates. The reactivity of GSH with ninhydrin is decreased after irradiation with a photosensitizer. Glutathione seems to be a biomolecule that is suitably sensitive to photosensitized modification and thus suitable for evaluation of any photosensitizing activity that new drugs may have as an unwanted side effect. In Methods in Enzymology 11 (Edited by P. S. Colowich and N. 0. Kaplan) 127: pp. 722-725. Academic Press, New York. 161--170. Wiener Klin. Woch. 89, 177-184.

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“…Analogous tests for peroxides W'ere made at the several stations by bubbling air samples through a solution of ferrous thiocyanate in absolute alcohol (11). No color visible to the• eye was ever produced at these outside stations, w'hereas appreciable color was produced when the atmosphere was tested in the Los Angeles area.…”

Section: Significance Of "Ozone Equivalent"mentioning

confidence: 99%