Preparation method and application of rhizoma polygonati superfine powder

Abstract

The invention discloses a preparation method and application of rhizoma polygonati superfine powder, and the preparation method comprises the following steps: step 1, taking raw rhizoma polygonati, washing, slicing, drying in a drying oven, and taking out the dried rhizoma polygonati slices for later use; step 2, crushing the dried rhizoma polygonati slices by using a universal crusher, and after crushing is completed, performing sieving to obtain powder of 40-80 meshes, powder of 80-120 meshes, powder of 120-160 meshes and powder of 160-200 meshes, and respectively recording the powder as PS1, PS2, PS3 and PS4; and step 3, grinding 160-200-mesh rhizoma polygonati powder by using a ball mill, and sieving after grinding to obtain rhizoma polygonati superfine powder marked as SPS. According to the method, additional components do not need to be added, active substances of polygonatum sibiricum are reserved, and the method is more suitable for research on independent properties of the polygonatum sibiricum superfine powder, such as antioxidant activity, solubility and particle size distribution. The prepared rhizoma polygonati superfine powder has better solubility, can be applied to various foods, health-care products and pharmaceutical preparations, and is high in raw material utilization rate, simple and convenient in process and convenient for industrial popularization.

Description

Technical Field

[0001] The invention relates to the field of industrialization, and in particular to a preparation method of polygonatum superfine powder and application thereof. Background Art

[0002] As a natural edible medicinal and edible plant resource, Polygonatum sibiricum has extremely high medicinal value. It contains a variety of compounds such as polysaccharides, flavonoids, saponins, triterpenes, etc., and has a variety of biological activities such as lowering blood sugar, lowering blood lipids, and anti-oxidation. Ultrafine grinding technology is an advanced material processing technology. After ultrafine grinding, the specific surface area of ​​the material increases, which changes the physical and chemical properties of the material itself, such as increased solubility, increased dissolution of active substances, and improved dispersibility and adsorption of food. In recent years, there has been a precedent for Polygonatum sibiricum being processed into ultrafine powder, but there is a lack of reports on the preparation technology of Polygonatum sibiricum ultrafine powder. The present invention uses a ball milling method to grind and sieve Polygonatum sibiricum powder to prepare high-purity Polygonatum sibiricum ultrafine powder. The present invention does not need to add additional ingredients, retains the active substances of Polygonatum sibiricum itself, and is more suitable for studying the individual properties of Polygonatum sibiricum ultrafine powder, such as antioxidant activity, solubility, particle size distribution, etc. The polygonatum superfine powder prepared by the invention has good solubility, can be applied to various foods, health products and pharmaceutical preparations, has high raw material utilization rate, is simple in process and is convenient for industrial promotion. Summary of the invention

[0003] In view of this, the present invention provides a preparation method of polygonatum superfine powder and application thereof.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A method for preparing superfine polygonatum powder comprises the following steps:

[0006] Step 1: Take raw Polygonatum, wash and slice it, put it in an oven to dry, and take out the dried Polygonatum slices for later use;

[0007] Step 2: Grind the dried polygonatum slices with a universal grinder, and after the grinding is completed, sieve to obtain 40-80 mesh powder, 80-120 mesh powder, 120-160 mesh powder, and 160-200 mesh powder, which are respectively recorded as PS1, PS2, PS3, and PS4;

[0008] Step 3: Grind the 160-200 mesh polygonatum powder with a ball mill, and sieve it after grinding to obtain superfine polygonatum powder, which is recorded as SPS.

[0009] Preferably, in step 1, the amount of raw polygonatum added is 400-600g, wherein the optimal amount of raw polygonatum added is 500g.

[0010] Preferably, in step 1, the oven temperature is 50°C.

[0011] Preferably, in step 1, the drying time is 24-48 hours.

[0012] Preferably, in step 2, the crushing time is 1 min, and the crushing is paused for 10 s every 15 s to avoid over-high temperature.

[0013] Preferably, in step 3, the grinding time is 1.5-2.5 h, wherein the optimal grinding time is 2 h.

[0014] Preferably, in step 3, the ball-to-material ratio is (8-10):1, wherein the optimal ball-to-material ratio is 10:1.

[0015] Preferably, in step 3, the rotation speed is 300 r / min, and the rotation direction is changed every half an hour.

[0016] Preferably, in step 3, the product is sieved through a 200-mesh sieve.

[0017] A method for preparing superfine polygonatum powder and its application in preparing yogurt.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The present invention adopts a ball milling method to grind and sieve polygonatum powder to prepare a high-purity polygonatum ultrafine powder. The present invention does not need to add additional ingredients, retains the active substances of polygonatum itself, and is more suitable for studying the individual properties of polygonatum ultrafine powder, such as antioxidant activity, solubility, particle size distribution, etc. The polygonatum ultrafine powder prepared by the present invention has the characteristics of uniform particle size, good dispersibility, and easy absorption, and can be applied to a variety of foods, health products and pharmaceutical preparations. It has a high raw material utilization rate, a simple process, and is convenient for industrial promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A preparation method of polygonatum superfine powder and a particle size distribution diagram of polygonatum powder with different particle sizes for application of the present invention;

[0021] Figure 2 A method for preparing superfine polygonatum powder and a line graph showing the effect of the addition amount of superfine polygonatum powder used in the invention on the sensory score of yogurt;

[0022] Figure 3 The invention discloses a method for preparing ultrafine polygonatum powder and a line graph showing the influence of the amount of polygonatum polysaccharide added to the yogurt sensory score. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] A method for preparing superfine polygonatum powder comprises the following steps:

[0025] Step 1: Take 400-600g of raw Polygonatum sibiricum, wash and slice, put into a 50℃ oven to dry for 24h, take out the dried Polygonatum sibiricum slices for later use;

[0026] Step 2: Grind the dried Polygonatum sibiricum slices with a universal grinder for 1 min, pause for 10 s every 15 s to avoid overheating. After the grinding is completed, sieve to obtain 40-80 mesh powder, 80-120 mesh powder, 120-160 mesh powder, and 160-200 mesh powder, which are recorded as PS1, PS2, PS3, and PS4 respectively;

[0027] Step 3: Grind the 160-200 mesh polygonatum powder with a ball mill for 1.5-2.5 hours, with a ball-to-material ratio of (8-10):1, a rotation speed of 300 r / min, and change the rotation direction every half an hour. After grinding, pass through a 200-mesh sieve to obtain superfine polygonatum powder, recorded as SPS.

[0028] A method for preparing superfine polygonatum powder and its application in preparing yogurt.

[0029] Embodiment 1:

[0030] A method for preparing superfine polygonatum powder comprises the following steps:

[0031] Step 1: Take 400g of raw Polygonatum, wash and slice it, put it in a 50℃ oven to dry for 24h, take out the dried Polygonatum slices for later use;

[0032] Step 2: Grind the dried Polygonatum sibiricum slices with a universal grinder for 1 min, pause for 10 s every 15 s to avoid overheating. After the grinding is completed, sieve to obtain 40-80 mesh powder, 80-120 mesh powder, 120-160 mesh powder, and 160-200 mesh powder, which are recorded as PS1, PS2, PS3, and PS4 respectively;

[0033] Step 3: Grind the 160-200 mesh polygonatum powder with a ball mill for 1.5 hours, with a ball-to-material ratio of 8:1 and a rotation speed of 300 r / min. Change the rotation direction every half an hour. After grinding, pass it through a 200-mesh sieve to obtain superfine polygonatum powder, recorded as SPS.

[0034] Embodiment 2:

[0035] A method for preparing superfine polygonatum powder comprises the following steps:

[0036] Step 1: Take 500g of raw Polygonatum, wash and slice it, put it in a 50℃ oven to dry for 24h, and take out the dried Polygonatum slices for later use;

[0037] Step 2: Grind the dried Polygonatum sibiricum slices with a universal grinder for 1 min, pause for 10 s every 15 s to avoid overheating. After the grinding is completed, sieve to obtain 40-80 mesh powder, 80-120 mesh powder, 120-160 mesh powder, and 160-200 mesh powder, which are recorded as PS1, PS2, PS3, and PS4 respectively;

[0038] Step 3: Grind the 160-200 mesh polygonatum powder with a ball mill for 12 hours, with a ball-to-material ratio of 10:1 and a rotation speed of 300 r / min. Change the rotation direction every half an hour. After grinding, pass it through a 200-mesh sieve to obtain superfine polygonatum powder, recorded as SPS.

[0039] Embodiment 3:

[0040] A method for preparing superfine polygonatum powder comprises the following steps:

[0041] Step 1: Take 600g of raw Polygonatum, wash and slice it, put it in a 50℃ oven to dry for 24h, take out the dried Polygonatum slices for later use;

[0042] Step 2: Grind the dried Polygonatum sibiricum slices with a universal grinder for 1 min, pause for 10 s every 15 s to avoid overheating. After the grinding is completed, sieve to obtain 40-80 mesh powder, 80-120 mesh powder, 120-160 mesh powder, and 160-200 mesh powder, which are recorded as PS1, PS2, PS3, and PS4 respectively;

[0043] Step 3: Grind the 160-200 mesh polygonatum powder with a ball mill for 2.5 hours, with a ball-to-material ratio of 9:1 and a rotation speed of 300 r / min. Change the rotation direction every half an hour. After grinding, pass it through a 200-mesh sieve to obtain superfine polygonatum powder, recorded as SPS.

[0044] Experimental Results

[0045] (1) Powder particle size test:

[0046] Table 1 summarizes the particle size parameters of PS powder, including D10, D50, D90, Asf, and span values. D50 represents the median particle size, and span represents the width of the particle size distribution. As shown in Table 1, the D50 value of PS powder decreased significantly from 654.4 μm to 24.6 μm, indicating that the SPS sample reached the ultrafine powder level. The Asf value increased with the decrease in particle size. The larger the span value of the PS sample, the wider the particle size distribution. These data are consistent with Figure 1 The distribution curve shown in is consistent.

[0047] Table 1 Data of different particle sizes of polygonatum powder

[0048]

[0049] (2) Powder flowability test:

[0050] As the particle size of PS powder decreases, the bulk density decreases from 0.465×103 to 0.333×10kg / m3. The tap density of PS1, PS3, and PS4 particle sizes did not show significant differences. However, the tap density of SPS samples was lower compared to other powders, indicating that finer powders have more interparticle voids and larger contact surfaces with other particles than other particles. Therefore, ultrafine powders should be packaged in larger containers for final product packaging.

[0051] Table 2 Fluidity data of Polygonatum odoratum powder with different particle sizes

[0052]

[0053]

[0054] (3) Powder water holding capacity, oil holding capacity, swelling capacity, and water solubility tests:

[0055] As the particle size of PS powder decreases, the water holding capacity, swelling capacity and oil holding capacity all decrease significantly. The water holding capacity decreases from 6.19 to 2.25g / g, the swelling capacity decreases from 6.43 to 0.77mL / g, and the oil holding capacity decreases from 4.28 to 2.81g / g. This decrease may be due to the destruction of the original dense porous fiber structure of Polygonatum odoratum under the shear and friction of the crushing, and the solubility in water increases from 68.05% to 83.18%. It can be seen that the hydration and adsorption properties of ultrafine powder are affected by the particle size and grinding process, and its solubility is also better.

[0056] Table 3 Data of water holding capacity, swelling capacity, oil holding capacity and water solubility of Polygonatum odoratum powder with different particle sizes

[0057]

[0058] (4) Powder color difference experiment:

[0059] Table 4 lists the color parameters of different PS powders. Brightness (L * ) value increases with the increase of particle size, ranging from 79.29 to 87.77, while ΔE * The values ​​increased significantly from PS1 to SPS (p<0.05). * The highest value, but b *The value is the lowest. As the particle size of PS powder decreases, L * The value increases, b * The value decreased (p<0.05).

[0060] Table 4 Color difference data of different particle sizes of Polygonatum odoratum powder

[0061]

[0062]

[0063] It can be seen from the above embodiments that when a ball mill is used to grind 160-200 mesh polygonatum powder, the parameters are set to a ball-to-material ratio of 10:1, a rotation speed of 300r / min, and a grinding time of 2h, the obtained polygonatum ultrafine powder can have the most uniform particle size, the best dispersibility, and the easiest to absorb.

[0064] Embodiment 4:

[0065] A superfine polygonatum powder yogurt and a preparation method thereof, comprising the following steps:

[0066] Step 1: skim milk powder and warm water are mixed in a ratio of 1:8 to prepare raw milk, and then 0.4% of polygonatum superfine powder, 10% of xylitol, and 0.4% of pectin are added to the raw milk in sequence, and stirred with a magnetic stirrer for 5 minutes to dissolve, thereby forming a mixed milk;

[0067] Step 2: homogenize the mixed milk with a homogenizer for 5 minutes, and then sterilize it at 90°C for 10 minutes by pasteurization;

[0068] Step 3: Cool the sterilized mixed milk to 42°C, add 0.1% of a probiotic starter prepared by mixing thermophilic Streptococcus and Lactobacillus bulgaricus in a ratio of 1:1, and culture in an incubator at 42°C for 6-8 hours;

[0069] Step 4: After fermentation is completed, the mixture is post-ripened at 4°C for 12 hours to obtain the polygonatum superfine powder yogurt product.

[0070] The sensory scoring table is shown in Table 5.

[0071] Table 5: Effect of the addition amount of Polygonatum sibiricum superfine powder on the sensory score of yogurt

[0072]

[0073]

[0074] like Figure 2 As shown:

[0075] According to the sensory evaluation experiment, the sensory evaluation is best when the amount of superfine polygonatum powder added to yogurt is 0.4%. If the amount added is too high, the yogurt will be dull in color and the polygonatum flavor will be stronger, which is difficult to accept; if the amount added is too low, the polygonatum flavor in the yogurt will be too little, and the flavor characteristics of the product will not be prominent.

[0076] Embodiment 5:

[0077] A polygonatum polysaccharide yogurt and preparation method thereof:

[0078] Step 1: skim milk powder and warm water are mixed in a ratio of 1:8 to prepare raw milk, and then 0.15% of polygonatum polysaccharide and 10% of xylitol are added to the raw milk in sequence, and stirred with a magnetic stirrer for 5 minutes to dissolve, thereby forming a mixed milk;

[0079] Step 2: homogenize the mixed milk with polygonatum polysaccharide and xylitol for 5 minutes using a homogenizer, and then sterilize it at 90°C for 10 minutes using a pasteurization method;

[0080] Step 3: Cool the sterilized mixed milk to 42° C., add 0.1% of a probiotic starter prepared by mixing thermophilic Streptococcus and Lactobacillus bulgaricus in a ratio of 1:1, and culture in an incubator at 42° C. for 6 to 8 hours;

[0081] Step 4: After fermentation is completed, the mixture is post-ripened at 4°C for 12 hours to obtain a polygonatum polysaccharide yogurt product.

[0082] Experimental Results

[0083] like Figure 3 As shown:

[0084] According to the sensory evaluation experiment, the sensory evaluation is best when the amount of polygonatum polysaccharide added to yogurt is 0.15%. If the amount is too high, the texture of the yogurt will deteriorate and the color will be dull; if the amount is too low, the polygonatum flavor in the yogurt will be too little and the flavor characteristics of the product will not be prominent.

[0085] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for preparing superfine polygonatum powder, characterized in that: The following steps are involved: Step 1: Take raw Polygonatum, wash and slice it, put it in an oven to dry, and take out the dried Polygonatum slices for later use; Step 2: Grind the dried polygonatum slices with a universal grinder, and after the grinding is completed, sieve to obtain 40-80 mesh powder, 80-120 mesh powder, 120-160 mesh powder, and 160-200 mesh powder, which are respectively recorded as PS1, PS2, PS3, and PS4; Step 3: Grind the 160-200 mesh polygonatum powder with a ball mill, and sieve it after grinding to obtain superfine polygonatum powder, which is recorded as SPS.

2. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In the step 1, the amount of raw polygonatum added is 400-600g, wherein the best amount of raw polygonatum added is 500g.

3. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In step 1, the oven temperature is 50°C.

4. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In step 1, the drying time is 24-48 hours.

5. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In step 2, the crushing time is 1 min, and the crushing is paused for 10 s every 15 s to avoid excessive temperature.

6. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In step 3, the grinding time is 1.5-2.5 hours, wherein the optimal grinding time is 2 hours.

7. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In step 3, the ball-to-material ratio is (8-10):1, wherein the optimal ball-to-material ratio is 10:

1.

8. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In step 3, the rotation speed is 300 r / min, and the rotation direction is changed every half an hour.

9. The method for preparing superfine polygonatum powder according to claim 1, characterized in that: In the step 3, the mixture is sieved through a 200-mesh sieve.

10. Use of the preparation method of superfine polygonatum powder according to claims 1-9 in preparing yogurt.

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