Plum leaf extract and plum leaf green tea beverage and preparation method
A technology of plum leaves and green tea beverages, applied in tea extraction, tea spices, etc., can solve the problem of lack of natural D-borneol, etc., achieve the effects of improving gastrointestinal function, broadening the scope of application, and promoting digestion and absorption
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Embodiment 1
[0058] Prepare the plum leaf extract, adopt single factor test and orthogonal test to determine the reaction conditions: put the fresh tender leaves of the plum tree into water, extract, let stand for 6 hours after the extraction, stratification occurs, and take the supernatant; pass 16 layers of gauze filter the supernatant to obtain clarified plum leaf extract.
[0059]The content of soluble solids in the extract was determined by the refractometer method for the determination of soluble solids in GB12143.1-88 soft drinks; the content of natural d-borneol was determined by gas chromatography-mass spectrometry (GC-MS) (Agilent6890N / 5975 ) method test, using a headspace sampler.
[0060] 1. Research on extraction process of plum leaves
[0061] 1. Single factor test
[0062] On the basis of the pre-experiment, taking the soluble solids content and the natural d-borneol content in the extract as test indicators, A (extraction pressure), B (extraction temperature), C (extracti...
Embodiment 2
[0085] A preparation method of plum leaf green tea beverage, comprising the following steps:
[0086] (1) Preparation of plum leaf extract: 1.2MPa, 120°C hot water extraction method was used to extract 1.6h of fresh young leaves of plum tree with a material-to-liquid ratio of 1:1, and then left to stand for 6 hours after extraction. Stratification occurs, the supernatant is taken, and then the supernatant is filtered through 16 layers of gauze to obtain a clarified plum leaf extract.
[0087] (2) Preparation of green tea extract: mix green tea with hot water at 80°C in a mass-volume ratio of 1:100 (g:ml), and extract at 80°C for 20 minutes to obtain green tea extract.
[0088] (3) Composite preparation: Mix the plum leaf extract and green tea extract at a volume ratio of 1:1 to obtain the main solution; then add honey, white sugar, and citric acid, and stir until completely dissolved. Wherein the addition (g) of white granulated sugar is equivalent to 9% of the main body solu...
Embodiment 3
[0093] A preparation method of plum leaf green tea beverage, comprising the following steps:
[0094] (1) Preparation of plum leaf extract: 1.4MPa, 130°C hot water extraction method was used to extract the fresh tender leaves of plum tree with a ratio of material to liquid of 1:2 for 1.7h, and then let it stand for 6h after extraction. Stratification occurs, the supernatant is taken, and then the supernatant is filtered through 16 layers of gauze to obtain a clarified plum leaf extract.
[0095] (2) Preparation of green tea extract: mix green tea with hot water at 80°C in a mass-volume ratio of 1:100 (g:ml), and extract at 80°C for 20 minutes to obtain green tea extract.
[0096] (3) Composite preparation: Mix the plum leaf extract and green tea extract at a volume ratio of 1:1 to obtain the main solution; then add honey, white sugar, citric acid and stabilizer, and stir until completely dissolved. Wherein the addition (g) of white granulated sugar is equivalent to 9% of the ...
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