Processing method of a kind of dendrobium candidum health protection tea and products thereof
Technical field
The present invention relates to a kind of dendrobium candidum leaf health-care tea and processing method thereof, belong to the food field of drinking tea.
Background technology
Dendrobium candidum
Dendrobium officinaleKimura et Migo is China tradition rare traditional Chinese medicine, has reinforcing stomach reg fluid, unique effect such as nourishing Yin and clearing heat.As far back as Qin Han period, Shennong's Herbal is just put down in writing dendrobium candidum " in main the wound, except thin thin, the reinforcing yin essence of numbness, lower gas, tonifying five zang organs consumptive disease, for a long time take thick stomach "; " Taoist Scriptures " before more than 1000 year classifies dendrobium candidum as first of " Chinese nine immortals grass "; Li Shizhen (1518-1593 A.D.) is estimated dendrobium candidum " never sufficient in the benefit, flat stomach Qi, longue meat, intelligence development is made light of one's life by commiting suicide and prolonged life except frightened for reinforcing yin essence benefit essence, thick stomach " in Compendium of Material Medica; The celestial grass of help of being called among the people, international medicinal plant circle is called " medicine circle giant panda ".Modern pharmacological research proves, dendrobium candidum has the effects such as the immunity of enhancing, elimination tumour, inhibition cancer, pharyngolaryngitis, gastrointestinal disease, cataract, angiocardiopathy, diabetes, tumour all had significant curative effect, particularly the Human Lung Cancer cell is had great inhibitory action, inhibiting rate reaches 74.7% ~ 97.2%.For this reason, 2010 editions Pharmacopoeia of the People's Republic of China spies mark dendrobium candidum from Shihu " medicinal materials, record separately, and medicinal part is stem.In recent years, it is found that the dendrobium candidum leaf has significant auxiliary curative effect to symptoms such as hypertension, high fat of blood, hyperglycaemia, cardiovascular and cerebrovascular diseases, and the dendrobium candidum leaf is better than stem to the removing ability of DPPH free radical, the tradition that also has herb to eat (directly chew or squeeze the juice and take) raw among the people.The bright leaf of dendrobium candidum is processed into tea beverage, can improves better the utilization rate of dendrobium candidum herb resource, farthest bring into play its health care and clinical effect.
Summary of the invention
Traditional tealeaves is made tea beverage with the bright leaf of plant, is a kind of creation of China working people.In order to improve the extraction effect of active ingredient in the plant leaf blade, Chinese invention patent 201010169438.4 discloses a kind of technique of microwave-assisted preparation of lotus leaf tea in dry mode, it comprises completing in the general Tea Processing technique, knead, drying, and baking operation adopt micro-wave drying in the drying process, simultaneously the cell membrane of plant cell carried out broken wall, form trickle hole; It is characterized in that: take new fresh and tender lotus leaf as raw material, after new fresh and tender lotus leaf cutting, the employing water vapour completes, enzyme in the deactivation new lotus leaf, softening lotus leaf tissue, and nationality to be to remove the lotus leaf peculiar smell, rub into tight knot streak after, the lotus leaf of kneading shaping is carried out the process of drying aroma-improving with the high fiery microwave of micro-wave oven.Yet we find, because the polysaccharide and the flavonoids effective constituent that are rich in the dendrobium candidum blade, under different processing temperature conditions, the recovery rate of these active ingredients is different, when especially with high temperature the dendrobium candidum blade being processed, polysaccharide and flavones content and processing temperature are adverse consequences in the blade.Therefore, must select specific processing mode to carry out processing to the dendrobium candidum leaf health-care tea, to obtain the maximization of Dendrobium officinale polysaccharide and two kinds of active ingredients of general flavone content.
Summary of the invention
Purpose of the present invention be to provide a kind of dysgenic defective to active ingredient in the dendrobium candidum blade that produces for the processing method of existing tea, and a kind of new processing method that draws reaches the dendrobium candidum health protection tea with the method gained.
The present invention realizes by following manner: a kind of processing method of dendrobium candidum leaf health-care tea, comprise followingly drain after the iron-sheet dendrobe fresh product blade is cleaned, drying course, it is characterized in that, microwave input power 1200W is at first passed through in the oven dry of iron-sheet dendrobe fresh product blade, pre-dried 7min under the power output 800W condition; And then will be transferred to through the dendrobium candidum of pre-dried 60 ℃ of constant temperature blast drying ovens, freeze-day with constant temperature 2-4 hour, to water content 6%-9%, obtain dendrobium candidum leaf health-care tea product.
Described iron-sheet dendrobe fresh product blade places micro-wave oven, blade heap thickness 2 ~ 3cm.
When described iron-sheet dendrobe fresh product blade placed micro-wave oven to carry out pre-dried, the best pre-dried time was 5min.
A kind of dendrobium candidum leaf health-care tea, the general flavone that it is characterized in that described dendrobium candidum leaf health-care tea is 0.30-0.36%, total polyoses content is 14.00-16.50%.
As another preferred scheme, the general flavone of described dendrobium candidum leaf health-care tea is 0.75-0.80%, and total polyoses content is 8.00-8.50%.
Because the present invention by utilizing heating using microwave, can effectively protect the dendrobium candidum inclusion to avoid temperatures involved, makes the dendrobium candidum leaf health-care tea of gained have best health-care effect.And processing side is simple, therefore have good development prospect.
Figure of description
The different drying modes of Fig. 1 are on the impact of total polysaccharide and general flavone content in the dendrobium candidum health protection tea;
The different small processing times of Fig. 2 are on the impact of total polysaccharide and general flavone content in the dendrobium candidum health protection tea.
The specific embodiment
Embodiment 1, because the plant dendrobium candidum is different in the Various Seasonal physiological metabolism, therefore after Various Seasonal institute picking leaves sheet was processed into tea product, the content of its inclusion was also different, therefore can form the product of two kinds of styles.
Gather dendrobium candidum stem in biennial winter, take blade after, the iron-sheet dendrobe fresh product blade is cleaned, is drained, the iron-sheet dendrobe fresh product blade after then will cleaning places micro-wave oven, blade heap thickness 2 ~ 3cm.With microwave input power 1200W, pre-dried under the power output 800W condition; And then will be transferred to through the dendrobium candidum of pre-dried 60 ℃ of constant temperature blast drying ovens, and freeze-day with constant temperature 2-4 hour, to water content 6%-9%, obtaining the general flavone average content was 0.769%, total polyoses content is 8.26% dendrobium candidum leaf health-care tea product.With this method products obtained therefrom and the effective constituent determination contrast of adopting conventional method processing products obtained therefrom, the active ingredient of dendrobium candidum tea is significant difference, and concrete test data is seen Fig. 1.
Result of the test shows, processes with conventional oven dry processing method, and the general flavone content in the dendrobium candidum health protection tea, along with the raising of temperature is on a declining curve, and polyoses content, along with lifting trend is presented in the raising of temperature.And adopt micro-wave drying to process, can effectively obtain the maximum of dendrobium candidum health protection tea active ingredient.
Embodiment 2, gather dendrobium candidum stem in biennial spring, take blade after, the iron-sheet dendrobe fresh product blade is cleaned, is drained, the iron-sheet dendrobe fresh product blade after then will cleaning places micro-wave oven, blade heap thickness 2 ~ 3cm.With microwave input power 1200W, pre-dried under the power output 800W condition; Select three dendrobium candidum stem kinds, test with three kinds of microwave treatment times, the microwave drying time was respectively 3,5,7 minutes, and then will be transferred to through the dendrobium candidum of pre-dried 60 ℃ of constant temperature blast drying ovens, freeze-day with constant temperature 2-4 hour, to water content 6%-9%, obtaining the general flavone average content was 0.335%, total polyoses content is 15.33% dendrobium candidum leaf health-care tea product, and concrete test data is seen Fig. 2.