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Tea essential oil fidelity extraction method

An essential oil and extraction technology, applied in the field of tea essential oil extraction, can solve problems such as reducing the aroma fidelity of tea essential oil, and achieve the effects of avoiding water suffocation and reducing the loss of aroma substances

Inactive Publication Date: 2016-09-21
ZHEJIANG UNIV
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Problems solved by technology

[0003] However, at present the main methods of obtaining tea essential oils, such as simultaneous distillation and extraction (SDE), vacuum distillation and extraction (VDE), supercritical carbon dioxide extraction (SFE), etc.; Or non-selective emphasis on the extraction of water-soluble aroma components and other factors, resulting in varying degrees of deviation between the aroma style of tea essential oils and the sensory evaluation results, reducing the aroma fidelity of tea essential oils

Method used

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Embodiment 1

[0032] Embodiment 1, a kind of tea essential oil fidelity extraction method, utilizes the invention " controllable temperature simultaneous extraction device and using method " of patent No. 201310047211.6, carries out the following steps successively:

[0033] (1) Connect the water inlet of the condenser pipe 9 with the tap water pipe, add pure water into the U-shaped pipe 12 until it is flush with the water outlet 8;

[0034] (2) Turn on the controllable constant temperature heater to preheat: set the temperature at 158°C / 170°C (Note: This temperature is the temperature of the controllable constant temperature heater under the condition of 250 / 300ml water in the steam flask, if it is lower than this temperature The steam flow rate is too slow, and it is easy to cause bumping if the temperature is higher than this);

[0035] (3) Preparation of test materials and reagents: put 15g / 25g of tea leaves in the sample storage compartment 4, inject 250-300ml of boiling water into the...

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Abstract

The invention discloses a tea essential oil fidelity extraction method. The method comprises the steps that the controllable temperature is utilized, extraction is conducted through an extraction device, tea is weighed according to the dosage that 250-300 ml of pure water and 30 ml of extracting solvent are used for each 15-25 g of tea and put into a sample containing bin, the pure water is put into a water vapor flask, and the extracting solvent is put into an extracting solvent flask; the pure water enters the sample containing bin in the form of water vapor, and the vapor flow velocity is controlled by a controllable constant temperature heater, wherein the temperature set value of the controllable constant temperature heater ranges from 158 DEG C to 170 DEG C, the temperature of an extracting solvent reflux system is 45 DEG C, and the extraction time is 2 h to 3 h. According to the tea essential oil fidelity extraction method, the optimal extraction technology of tea essential oil fidelity of different types of tea is provided, and by means of the method, tea essential oil which is high in retention of the aromatic style and good in quality can be obtained.

Description

technical field [0001] The invention relates to a method for extracting tea essential oil, specifically according to the different characteristics of main teas in my country, and provides the best technology for extracting aroma with fidelity. Background technique [0002] Tea aroma is an important indicator to determine the value of tea and a key factor in tea quality appraisal, accounting for 25% to 30% of the comprehensive evaluation. "Realism" has always been the key to the pursuit of aroma research and the flavor industry, and it is also the basis for the reliability of various analysis techniques for determining tea types and grading based on tea aroma. The unique aroma of each tea is a comprehensive reflection of hundreds of aromatic substances. Tea essential oil is the product obtained by extraction, separation and concentration of these volatile aromatic substances. Its restoration of tea aroma is "fidelity" . However, due to the complex composition and poor stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/42
CPCA23F3/423
Inventor 龚淑英刘婉琼李春霖范方媛徐鹏程
Owner ZHEJIANG UNIV
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