Eine Schnellmethode zur Bestimmung von Lösungsmittelresten in extrahierten Ölen

Pardun, H.; Vogel, P.

doi:10.1002/lipi.19720740201

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…Temperature dependence of the induction times. In earlier works (5,9), the temperature coefficient f, of the induction time for a temperature change of 10 C was reported as 2.0-2.9. The temperature coefficients f, shown in Table 3 lie between 1.8 and 2.1 with regression coefficients (log t, vs T) better than 0.99.…”

Section: Resultsmentioning

confidence: 90%

Determination of the oxidative stability of fats and oils: Comparison between the active oxygen method (AOCS Cd 12‐57) and the rancimat method

Läubli¹,

Bruttel²

1986

J Americ Oil Chem Soc

319

165

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Oxidative stability is an important parameter in the characterization of fats and oils. The determination of this parameter with the Active Oxygen Method (AOM; AOCS Method Cd 12-57) is both very costly and labor intensive, owing to the repeated peroxide value determinations involved. The alternative rancimat method is based on the conductometric determination of volatile degradation products and features automatic plotting of the conductivity against time. The evaluation is performed graphically after completion of the experiment. The labor required for this method is considerably less as it is not necessary to perform titrations at regular intervals. In the determination of the peroxide values of six samples at three temperatures, ca 151 mixed solvent and chemicals valued at SFr. 400 (ca $180 US) were consumed.The induction times (tl) determined with both methods using six different fats and oils show a good correlation (slope 1.005, correlation coefficient 0.987). The rancimat method thus yields results equivalent to the AOCS Method Cd 12-57, but offers a real alternative for the determination of oxidative stabilities owing to the appreciable saving in labor.

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Section: Resultsmentioning

confidence: 90%

Determination of the oxidative stability of fats and oils: Comparison between the active oxygen method (AOCS Cd 12‐57) and the rancimat method

Läubli¹,

Bruttel²

1986

J Americ Oil Chem Soc

319

165

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Gemeinschaftsarbeiten der DGF, 68. Mitteilung Gewinnung von Fetten und Ölen aus pflanzlichen Rohstoffen durch Extraktion III

1976

Fette, Seifen, Anstrichm.

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Rapid quantitative determination of residual hexane in oils by direct gas chromatography

Dupuy

Fore

Rayner

1975

J Americ Oil Chem Soc

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A simple, direct, gas chromatographic technique is described for the quantitative determination of residual hexane in extracted vegetable oils. The method if rapid and sensitive to one ppm hexane. The inlet liner of a gas chromatograph was packed with 1 1/2 in. glass wool, and 25 mg oil was added onto it. The sample was capped with a small plug of glass wool, and the liner was inserted in the heated inlet of the gas chromatograph. Residual hexane rapidly eluted onto the Poropak P column by heat, and carrier gas was resolved in 20 min by temperature programing between 70–180 C. The method appears useful for monitoring continuous solvent removal processes.

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Eine Schnellmethode zur Bestimmung von Lösungsmittelresten in extrahierten Ölen

Cited by 5 publications

References 3 publications

Determination of the oxidative stability of fats and oils: Comparison between the active oxygen method (AOCS Cd 12‐57) and the rancimat method

Determination of the oxidative stability of fats and oils: Comparison between the active oxygen method (AOCS Cd 12‐57) and the rancimat method

Gemeinschaftsarbeiten der DGF, 68. Mitteilung Gewinnung von Fetten und Ölen aus pflanzlichen Rohstoffen durch Extraktion III

Rapid quantitative determination of residual hexane in oils by direct gas chromatography

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