Determination of acid values in oil seeds

Details Determination of acid values in oil seeds Determination of acid values in oil seeds

1996-10-08

1998-06-30

Warden, Jill

Chemistry: analytical and immunological testing

Food or dairy products

436 23, 436 60, 436 61, 436 71, 426417, G01N 3302

Patent

active

057732957

ABSTRACT:
A method for determining the acid value of oilseeds. A reagent kit for the rapid extraction of the free fatty acids from oilseeds which consists of reagents: "A" and "B". Reagent "A" contains a tertiary amine (such as triethanolamine) in water and an alcohol--hydrocarbon mixture as solvent. Preferred is water/isopropanol/heptane. Reagent "A" allows rapid (1-2 min) solid-liquid extraction of the free fatty acids and some other acids from oilseeds. Reagent "B" contains a strong acid and an inorganic salt in water. Reagent "B" enables the rextraction (liquid-liquid; about 5 min) of the free fatty acids only into a separate hydrocarbon phase, which can be used for the acid value determination.

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patent: 5620897 (1997-04-01), Zappe
Lapshina et al. "pH-metric determination of acid numbers for oils". Zh. Anal. Khim. (1991), 46 (6), 1150-8. Abstract only.
Danil'chuk et al. "Determination of the acid number of oils in sunflower seeds." Maslo-Zhir. Prom.-st. (1984), (6), 9-10 Abstract only.
Danil'chuk et al. "Accelerated method for the determination of the acid number of the oil in sunflower seeds". Maslo-Zhir. Prom.-st. (1979), (9), 6-8. Abstract only.
Turyan et al., Plenum Publishing Co., 1991, pH-Metric Method for the Determination of Acid Numbers of Oils, pp. 833-840, Translated from Zhurnal Analiticheskoi Khimii, vol. 46, pp. 1150-1158, Jun. 1991, Original in Russian.
May et al., An Automated Gas-Liquid Chromatographic Method of Measuring Free Fatty Acids on Canola, vol. 70, Mar. 1993, pp. 229-233.
International Standard, Oilseeds-Determination of Hexane Extract (or light petroleum extract), called "oil content", ISO 659: 1988(E), pp. 1-5.

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