Summary of the invention
The object of this invention is to provide that a kind of technique is simple, solvent safety is nontoxic, the forsythiaside A extracting method of with low cost, environmental protection.
For achieving the above object, the present invention adopts following technical proposal:
A preparation method for forsythiaside A, is characterized in that comprising several steps below:
1, acid extraction: get dry capsule of weeping forsythia medicinal material, 10~20 times of amounts of the sour water that is 1~3 by pH value are soaked 5~10 times, each 24h, with 200~300 order filter-cloth filterings, filtrate merges.
2, resin isolation: sour water drip washing resin 1~4BV (column volume) that above-mentioned filtrate is first 1~2 by pH value, upper AB-8 resin carries out separation, after loading, use again water wash 1~2BV, it is faint yellow to leacheate, clarifying, then uses 30~50% ethanol drip washing 3~10BV, collects alcohol leacheate, 60 ℃ of drying under reduced pressure are to without alcohol, and adjust pH is 1~3.
3, polymeric amide is separated: by 100~300 object polymeric amide on the parting liquid in above-mentioned (2), and the sour water drip washing resin 1~4BV that is first 1~2 by pH value, then use 0.06% NaHCO
3solution rinses 3~8BV, collect alkali lye, and adjust pH is 1~3.
4, resin isolation: the sour water drip washing resin 1~4BV that is first 1~2 by pH value by the parting liquid in above-mentioned (3), upper AB-8 resin, applied sample amount is 2~8BV, then uses 95% ethanol drip washing 2~6BV, collects alcohol leacheate, 60 ℃ are evaporated to dry.
5, reverse phase silica gel purifying: get 5~10 times of amount 30~50% dissolve with ethanol loadings for dry thing separated in above-mentioned (4), with 10% ethanol drip washing 2~10BV, then use the drip washing of 30-50% ethanol, collect 30-50% ethanol leacheate, 60 ℃ are evaporated to dry.
6, dextrane gel purifying: get 5~10 times of amount 30~50% dissolve with ethanol loadings for dry thing of purifying in above-mentioned (5), with 30~50% ethanol drip washing 3~10BV, collect flaxen colour band, 60 ℃ are evaporated to dry.
Extraction process of the present invention has following beneficial effect: this technique is to use alcohol water system to extract and separated technique completely, through processing parameter, improves, and has formed rational, modern and operational path environmental protection.
In addition, the resin material used of this operational path all can reuse, and has reduced production cost.Polymeric amide and AB-8 are very cheap resins, although and reverse phase silica gel and dextrane gel price are slightly high, while using, be that the purity of forsythiaside A is in nearly 80% left and right, so, the impurity seeing in seldom, through simple 95% alcohol flushing, just can reuse.Use extracting method of the present invention, the content of final product forsythiaside A can reach 90%~95%.Therefore, technique is simple, efficient, is applicable to suitability for industrialized production.
Embodiment
By the following example, will contribute to understand the present invention, but not limit content of the present invention.
Embodiment 1
(1) acid extraction: get dry capsule of weeping forsythia medicinal material 1000g, 10 times of amounts of the sour water that is 1 by pH value are soaked 5 times, each 24h, with 200 order filter-cloth filterings, filtrate merges.
(2) resin isolation: the sour water drip washing resin 1BV that above-mentioned filtrate is first 1 by pH value, upper AB-8 resin carries out separation, after loading, use water wash 1BV, it is faint yellow to leacheate, clarifying, then uses 30% ethanol drip washing 3BV again, collect alcohol leacheate, 60 ℃ of drying under reduced pressure are extremely without alcohol, and adjust pH is 1.
(3) polymeric amide is separated: by 100-200 object polymeric amide on the parting liquid in above-mentioned (2), and the sour water drip washing resin 1BV that is first 1 by pH value, then use 0.06% NaHCO
3solution rinses 3BV, collect alkali lye, and adjust pH is 1.
(4) resin isolation: the sour water drip washing resin 1BV that is first 1~2 by pH value by the parting liquid in above-mentioned (3), upper AB-8 resin, applied sample amount is 2BV, then uses 95% ethanol drip washing 2BV, collects alcohol leacheate, 60 ℃ of concentrating under reduced pressure as for.
(5) reverse phase silica gel purifying: get dry thing separated in above-mentioned (4) and purify with reverse phase silica gel: get dry thing, by 5 times of amount 30% dissolve with ethanol loadings, with 10% ethanol drip washing 2BV, then use 30% ethanol drip washing, collect 30% ethanol leacheate, 60 ℃ are evaporated to dry.
(6) dextrane gel purifying: get 5 times of amount 30% dissolve with ethanol loadings for dry thing of purifying in above-mentioned (5), with 30% ethanol drip washing 3BV, collect flaxen colour band, 60 ℃ are evaporated to dry.
Embodiment 2
(1) acid extraction: get dry capsule of weeping forsythia medicinal material 5000g, 20 times of amounts of the sour water that is 3 by pH value are soaked 10 times, each 24h, with 300 order filter-cloth filterings, filtrate merges.
(2) resin isolation: the sour water drip washing resin 4BV that above-mentioned filtrate is first 2 by pH value, upper AB-8 resin carries out separation, after loading, use water wash 2BV, it is faint yellow to leacheate, clarifying, then uses 50% ethanol drip washing 10BV again, collect alcohol leacheate, 60 ℃ of drying under reduced pressure are extremely without alcohol, and adjust pH is 3.
(3) polymeric amide is separated: by 200-300 object polymeric amide on the parting liquid in above-mentioned (2), and the sour water drip washing resin 4BV that is first 2 by pH value, then use 0.06% NaHCO
3solution rinses 8BV, collect alkali lye, and adjust pH is 3.
(4) resin isolation: the sour water drip washing resin 4BV that is first 1~2 by pH value by the parting liquid in above-mentioned (3), upper AB-8 resin, applied sample amount is 8BV, then uses 95% ethanol drip washing 6BV, collects alcohol leacheate, 60 ℃ of concentrating under reduced pressure as for.
(5) reverse phase silica gel purifying: get dry thing separated in above-mentioned (4), by 10 times of amount 50% dissolve with ethanol loadings, with 10% ethanol drip washing 10BV, then use 50% ethanol drip washing, collect 50% ethanol leacheate, 60 ℃ are evaporated to dry.
(6) dextrane gel purifying: get 10 times of amount 50% dissolve with ethanol loadings for dry thing of purifying in above-mentioned (5), with 50% ethanol drip washing 10BV, collect flaxen colour band, 60 ℃ are evaporated to dry.
Embodiment 3
(1) acid extraction: get dry capsule of weeping forsythia medicinal material 800g, 15 times of amounts of the sour water that is 1.5 by pH value are soaked 8 times, each 24h, with 200 order filter-cloth filterings, filtrate merges.
(2) resin isolation: the sour water drip washing resin 3BV that above-mentioned filtrate is first 1.5 by pH value, upper AB-8 resin carries out separation, after loading, use water wash 1BV, it is faint yellow to leacheate, clarifying, then uses 40% ethanol drip washing 4BV again, collect alcohol leacheate, 60 ℃ of drying under reduced pressure are extremely without alcohol, and adjust pH is 2.
(3) polymeric amide is separated: by 100-200 object polymeric amide on the parting liquid in above-mentioned (2), and the sour water drip washing resin 3BV that is first 1.5 by pH value, then use 0.06% NaHCO
3solution rinses 6BV, collect alkali lye, and adjust pH is 2.
(4) resin isolation: the sour water drip washing resin 3BV that is first 1~2 by pH value by the parting liquid in above-mentioned (3), upper AB-8 resin, applied sample amount is 5BV, then uses 95% ethanol drip washing 4BV, collects alcohol leacheate, 60 ℃ are evaporated to dry.
(5) reverse phase silica gel purifying: get dry thing separated in above-mentioned (4), by 8 times of amount 40% dissolve with ethanol loadings, with 10% ethanol drip washing 6BV, then use 40% ethanol drip washing, collect 40% ethanol leacheate, 60 ℃ are evaporated to dry.
(6) dextrane gel purifying: get 8 times of amount 40% dissolve with ethanol loadings for dry thing of purifying in above-mentioned (5), with 40% ethanol drip washing 4BV, collect flaxen colour band, 60 ℃ are evaporated to dry.
Embodiment 4
(1) acid extraction: get dry capsule of weeping forsythia medicinal material 30g, 13 times of amounts of the sour water that is 2 by pH value are soaked 6 times, each 24h, with 200 order filter-cloth filterings, filtrate merges.
(2) resin isolation: the sour water drip washing resin 2BV that above-mentioned filtrate is first 1.3 by pH value, upper AB-8 resin carries out separation, after loading, use again water wash 1BV, it is faint yellow to leacheate, clarifying, then uses 35% ethanol drip washing 8BV, collects alcohol leacheate, 60 ℃ of drying under reduced pressure are extremely without alcohol, and adjust pH is 2.5.
(3) polymeric amide is separated: by 200-300 object polymeric amide on the parting liquid in above-mentioned (2), and the sour water drip washing resin 2BV that is first 1.3 by pH value, then use 0.06% NaHCO
3solution rinses 5BV, collect alkali lye, and adjust pH is 1.5.
(4) resin isolation: the sour water drip washing resin 2BV that is first 1~2 by pH value by the parting liquid in above-mentioned (3), upper AB-8 resin, applied sample amount is 4BV, then uses 95% ethanol drip washing 3BV, collects alcohol leacheate, 60 ℃ are evaporated to dry.
(5) reverse phase silica gel purifying: get dry thing separated in above-mentioned (4), by 6 times of amount 25% dissolve with ethanol loadings, with 10% ethanol drip washing 5BV, then use 35% ethanol drip washing, collect 35% ethanol leacheate, 60 ℃ are evaporated to dry.
(6) dextrane gel purifying: get 7 times of amount 25% dissolve with ethanol loadings for dry thing of purifying in above-mentioned (5), with 25% ethanol drip washing 8BV, collect flaxen colour band, 60 ℃ are evaporated to dry.
Embodiment 5
(1) acid extraction: get dry capsule of weeping forsythia medicinal material 200g, 18 times of amounts of the sour water that is 2.5 by pH value are soaked 9 times, each 24h, with 300 order filter-cloth filterings, filtrate merges.
(2) resin isolation: the sour water drip washing resin 4BV that above-mentioned filtrate is first 1.8 by pH value, upper AB-8 resin carries out separation, after loading, use again water wash 2BV, it is faint yellow to leacheate, clarifying, then uses 45% ethanol drip washing 7BV, collects alcohol leacheate, 60 ℃ of drying under reduced pressure are extremely without alcohol, and adjust pH is 1.5.
(3) polymeric amide is separated: by 100-300 object polymeric amide on the parting liquid in above-mentioned (2), and the sour water drip washing resin 4BV that is first 1.8 by pH value, then use 0.06% NaHCO
3solution rinses 7BV, collect alkali lye, and adjust pH is 2.5.
(4) resin isolation: the sour water drip washing resin 4BV that is first 1~2 by pH value by the parting liquid in above-mentioned (3), upper AB-8 resin, applied sample amount is 7BV, then uses 95% ethanol drip washing 5BV, collects alcohol leacheate, 60 ℃ are evaporated to dry.
(5) reverse phase silica gel purifying: get dry thing separated in above-mentioned (4), by 9 times of amount 45% dissolve with ethanol loadings, with 10% ethanol drip washing 8BV, then use 45% ethanol drip washing, collect 45% ethanol leacheate, 60 ℃ are evaporated to dry.
(6) dextrane gel purifying: get 9 times of amount 45% dissolve with ethanol loadings for dry thing of purifying in above-mentioned (5), with 45% ethanol drip washing 5BV, collect flaxen colour band, 60 ℃ are evaporated to dry.
Test example
The present invention carries out qualitative detection by thin layer detection system to extract.
First measure the weight (in Table 1) of extract in every group of embodiment, and then according to following detection method, the forsythiaside A content of 5 embodiment samples of the present invention is carried out to detection by quantitative, detected result is in Table 2.
Content assaying method: measure according to high performance liquid chromatography (< < Pharmacopoeia of People's Republic of China > > appendix VI D in 2005).
1, chromatographic condition chromatographic column: Dikma C
18(250mm * 4.6mm, 5 μ m); Moving phase: acetonitrile-water-acetic acid (15: 85: 0.2); Flow velocity: 1.0mLmin
-1; Detect wavelength: 332nm; Column temperature: room temperature; Forsythiaside A theoretical plate number is not less than 3000 with this understanding.
2, it is appropriate that forsythiaside A reference substance is got in the preparation of reference substance solution, accurately weighed, adds 50% ethanol to make every 1ml containing the solution of 0.4mg, obtains.
The preparation precision of need testing solution takes sample powder 10mg, puts in 25ml volumetric flask.Add 50% ethanolic soln 20ml, jolting is all dissolved it, then adds 50% ethanolic soln to scale, shakes up, and with 0.45 μ m filtering with microporous membrane, obtains.
Table 1
Sample |
Example weight (g) |
Extract weight (g) |
Embodiment 1 |
1000 |
6.98 |
Embodiment 2 |
5000 |
35.31 |
Embodiment 3 |
800 |
5.58 |
Embodiment 4 |
30 |
0.22 |
Embodiment 5 |
200 |
1.41 |
Table 2
Sample |
Extract weight (mg) |
Forsythiaside A weight (mg) |
Embodiment 1 |
9.98 |
9.18 |
Embodiment 2 |
10.01 |
9.26 |
Embodiment 3 |
9.97 |
9.46 |
Embodiment 4 |
10.03 |
9.35 |
Embodiment 5 |
9.99 |
9.21 |
Discuss: adopt extracting method of the present invention, the stable content of final extract, extraction yield is about 7 ‰, and the content of final product forsythiaside A reaches more than 90%, illustrates that technique is simple and efficient, is applicable to suitability for industrialized production.