Supercritical fluid extraction method of sword iris seed oil and application thereof

Abstract

The invention relates to the technical field of sword iris seed oil extraction, in particular to a supercritical fluid extraction method of sword iris seed oil and application thereof. The method specifically comprises three steps: raw material treatment, supercritical fluid extraction condition optimization and supercritical fluid extraction. The supercritical fluid extraction method is simple, convenient, rapid and accurate, the average yield of sword iris seed oil is 11.15%, and the relative error between the average yield and a theoretical value is 0.53% and is higher than the existing yield of sword iris seed oil. The content of unsaponifiable matters in the obtained sword iris seed oil is 1.31%, 40 components are identified in total, the total content of eight sterol compounds is upto 87.44%, betulinaldehyde is identified in iris plants for the first time; there are 18 kinds of fatty acids, the unsaturated fatty acids account for about 85%, the polyunsaturated acids account for54.87%; more than 30 volatile components exist; the average content of total polyphenol is 49.83 mg/kg, and the obtained sword iris seed oil has strong antioxidant activity, can be applied to cosmetics, foods and medicines, and can also be applied to industry.

Description

technical field [0001] The invention relates to the technical field of extracting iris seed oil, in particular to a supercritical fluid extraction method and application of iris seed oil. Background technique [0002] Ma Lin ( Iris lactea Pall. var. chinensis (Fisch.) Koidz. ) is a variant of Iridaceae Iris, a perennial herbaceous perennial plant. Distributed in Korea, Russia, India and China. In addition to the southeast coastal area in China, there are more than 20 other provinces with large-scale distribution and huge resources. This species mainly grows in wastelands, roadsides, and hillside grasslands, especially in overgrazing saline-alkali grasslands. It has good salt tolerance and ornamental value, and it is also tolerant to heavy metal elements such as lead and cadmium. It is often used as a saline-alkali indicator in saline-alkali grasslands and used for vegetation restoration in saline-alkali grasslands and oil-polluted areas. In addition to its ecological va...

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Problems solved by technology

However, there are few reports on the research on Iris seed oil, and the yield rate of Iris seed oil in the existing research is only 4.193%.

Soxhlet extraction method: the yield of seed oil is low, the solvent is difficult to remove, which affects the use of seed oil; the existing supercritical fluid extraction method: the seed coat is not removed, and the seed coat contains harmful components, which affects the utilization of seed oil; it has not been optimized , the resulting yield is not high

At present, there is no research on the chemical composition and biological activity of Iris seed oil. Therefore, it is urgent to establish a simple, fast, high-yield and accurate supercritical fluid extraction method for Iris seed oil.

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