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Drying method of flower materials in peony flower tea preparation technology

A preparation process and peony tea technology are applied in the field of drying flower materials in the preparation process of peony tea, can solve the problems of low fiber content and affect the quality of peony petal tea, improve product quality, shorten drying time, and realize comprehensive utilization Effect

Inactive Publication Date: 2016-06-29
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the thinner peony petals and lower fiber content, it is easy to be overheated locally during the production of peony petal tea by imitating the processing technology of green tea, which will affect the quality of peony petal tea.

Method used

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  • Drying method of flower materials in peony flower tea preparation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Quickly peel off the outermost petals of the peonies "Yinhongqiaopair" (rose type, pink) collected in April at the early blooming stage of the peony to remove the mud. Carefully peel off the petals with tweezers, keeping the petals intact. Put the processed peony petals in the best shape into -80°C refrigerator for 12 hours, without squeezing or stacking. Put the pre-cooled peony flowers into the vacuum freeze dryer quickly, set the cold step temperature of -70°C, the vacuum degree of the drying chamber of 0.1MPa, the temperature of the heating plate of 15°C, the material thickness of 10mm, and dry for 36h (petals) . The dried petals were crushed and sieved, and 2g of dry powder was extracted with acidified methanol to extract its phenolic substances. The total phenolic content was determined by Folin-Schoka method to be 4753.95GAEmg / 100g, NaNO 2- AlCl 3 The total flavonoid content determined by the method was 674.00REmg / 100g, the DPPH free radical scavenging ability...

Embodiment 2

[0040] Quickly peel off the outermost petals of the peonies "big brown and purple" (rose type, deep red) collected in April at the early blooming stage, remove the mud and dirt, keep the 3cm stems, and dry the whole flower. Put the treated peony flowers in the best form into -60°C refrigerator for 24 hours, without squeezing or stacking. Put the pre-cooled peony flowers into the vacuum freeze dryer quickly, set the cold step temperature of -60°C, the vacuum degree of the drying chamber of 0.08MPa, the heating plate temperature of 25°C, the material thickness of 15mm, and dry for 96h (whole flower ). The dried whole flower was crushed and sieved, and 2g of the dry powder was extracted with acidified methanol to extract its phenolic substances. The total phenolic content was determined to be 4442.55GAEmg / 100g, NaNO 2- AlCl 3 The total flavonoid content is 966.06REmg / 100g, the DPPH free radical scavenging ability is 59.41%, and the ABTS+·scavenging ability is 41.97%.

Embodiment 3

[0042] Quickly peel off the outermost petals of the peony "Jingyu" (crown type, white) collected in April at the early blooming stage to remove the mud. Carefully peel off the petals with tweezers, keeping the petals intact. Put the processed peony petals in the best shape into the -40°C refrigerator for 24 hours, without squeezing or stacking. Put the pre-cooled peony flowers into the vacuum freeze dryer quickly, set the cold step temperature of -60°C, the vacuum degree of the drying chamber of 0.09MPa, the temperature of the heating plate of 16°C, the material thickness of 9mm, and dry for 48h (petals) . The dried petals were crushed and sieved, and 2g of the dry powder was extracted with acidified methanol to extract its phenolic substances. The total phenolic content was determined by Folin-Schoka method to be 3425.62GAEmg / 100g, NaNO 2- AlCl 3 The total flavonoid content determined by the method was 440.15REmg / 100g, the DPPH free radical scavenging ability was 64.87%, a...

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Abstract

The invention discloses a drying method of flower materials in a peony flower tea preparation technology. The drying method includes the following steps that fresh peony flowers are picked; outermost petals of the peony flowers are stripped off, dirt is removed, and the integrity of petals is kept; the treated peony flowers are put into a cryogenic refrigerator in the optimum form to be pre-cooled; the pre-cooled peony flowers are rapidly put into a vacuum freezing dryer, the freezing temperature, the vacuum degree of a drying chamber, the temperature of a heating plate and the thickness of the material are set, and freezing drying is carried out; the dried peony flowers are stored in a sealed shady place. The dried peony flowers obtained through the drying method hardly shrink, the original color and flavor are kept basically, and the dried peony flowers have the advantages of being high in phenolic substance content and high in oxidation resistance, can serve as a high-quality raw material of peony flower tea and also have high ornamental value. According to the drying method, on the basis of vacuum freezing drying, the drying time is short, the process is simple, no contamination is caused, the product is good in sensory quality, high in nutrient retention rate and good in rehydration property, and the defects of high time consumption and labor consumption, low efficiency and the like of a traditional drying method are overcome.

Description

technical field [0001] The invention belongs to the field of raw material preparation of scented tea, and in particular relates to a method for drying flower materials in the preparation process of peony scented tea. Background technique [0002] Peony is a deciduous shrub of Paeoniaceae (Paeoniaceae). Important native ornamental flowers. In addition to its important ornamental value, peony flowers also contain essential amino acids, minerals, vitamins, etc., which can be used as meals, scented tea, and essential oils. In 2013, Heze Fengdan Peony was approved by the Ministry of Health as a new food raw material. [0003] Scented tea mainly refers to tea other than tea leaves. Although this type of tea is not made from tea leaves, it is drunk as tea, such as chrysanthemum tea, rose tea, honeysuckle tea, lotus tea, Eucommia tea, etc. With the development of society and the improvement of scientific level, flowers have become a new generation of natural health food resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/34
CPCA23F3/34
Inventor 张延龙牛立新孙嘉怡张刚
Owner NORTHWEST A & F UNIV
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