Simultaneous nitrogen blowing extraction device and essential oil fidelity extraction method

Abstract

The invention discloses a simultaneous nitrogen blowing extraction device, which includes a safety bottle, a sample storage chamber, a low-temperature condensation circulation pump and an extraction chamber. A condenser with a condensing pipe is located in the extraction chamber. The solid sample storage bin above the partition and the liquid sample storage bin under the porous partition; the liquid sample storage bin is connected to the inner cavity of the safety bottle through a nitrogen conduit, and the top outlet of the solid sample storage bin is connected to the sample in the extraction chamber. The steam inlet is connected, the top of the extraction solvent channel is connected with the extraction agent inlet of the extraction chamber, and the bottom end of the extraction solvent channel is connected with the extraction solvent flask through the extraction solvent flask interface. The present invention also simultaneously provides a method for extracting essential oils with high quality by using the above-mentioned device. By adopting the invention, the tea essential oil with high retention degree can be obtained which is consistent with the evaluation system of tea aroma style quality characteristics.

Description

technical field [0001] The invention belongs to the field of food engineering; in particular, it relates to a simultaneous extraction (simultaneous extraction, SE) device, especially a nitrogen purging simultaneous extraction device and its use method. Aroma fidelity extraction process and supporting parameters. Background technique [0002] At present, the common plant essential oils are extracted by simultaneous distillation and extraction devices, that is, the sample liquid and the organic solvent are heated to boil at the same time, and the water vapor containing the sample components and the solvent vapor generated are condensed in the condensation chamber at the same time, and the sample liquid is solid. Samples are prepared by immersing in an aqueous solution in a retort. This method of extracting aroma essential oils requires the volatile compounds of the sample to be distilled under boiling conditions, that is, the sample needs to be cooked in a high-temperature en...

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Problems solved by technology

However, due to the above-mentioned method, aroma substances are still continuously brought into the condensation tube by high-temperature water vapor during the 2-3h process of extraction, especially for tea leaves such as white tea with fresh and fresh flavor characteristics, in a long-term high-temperature, oxygen-containing environment Under these conditions, aroma substances with fresh flavor are prone to chemical transformations such as oxidation, resulting in a large difference between the extracted tea essential oil and the original tea aroma style, and the fidelity effect is reduced. That is, the above-mentioned traditional simultaneous distillation extraction and improved The authentic extraction method of tea essential oils is not suitable for the extraction of essential oils of teas such as white tea with a fresh / pure style

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