Summary of the invention
At above technological deficiency, the object of the present invention is to provide a kind of method that can fast, accurately measure the content of sanguisorbin I in garden burnet medicinal material, its extract or the preparation, a kind of method with the content of sanguisorbin I in high effective liquid chromatography for measuring garden burnet medicinal material, its extract or the preparation is provided particularly.
The method of the invention comprises:
1) test sample of getting the standard items of sanguisorbin I respectively and containing sanguisorbin I is dissolved in the ethanol water, makes standard solution and need testing solution respectively;
2) get isopyknic standard solution and need testing solution respectively and inject high performance liquid chromatograph, the peak area of measurement standard product solution and need testing solution and calculating promptly gets the content of the sanguisorbin I in the test sample then;
Wherein, the stationary phase of described high performance liquid chromatograph is the carbon octadecyl silane; Moving phase is methanol-water solution.
In the inventive method, as embodiment preferred, the particle diameter of described carbon octadecyl silane is≤5 μ m; Further the particle diameter of preferred described carbon octadecyl silane is 5 μ m, 4 μ m or 3.5 μ m.
Moving phase of the present invention is the solution of methanol-water, is preferably: in percent by volume, the gradient solution of 60%~80% methanol in water or be 50%~80% methanol in water etc. the degree solution.
In the inventive method, when described moving phase adopts the gradient solution of 60%~80% methanol in water; Preferred described gradient solution consists of: in percent by volume, and 0~17min, 60% → 70% methanol in water, 17~25min, 70% → 80% methanol in water, 25~35min, 80% methanol in water; Or
0~7min, 60% → 64% methanol in water, 7~12min, 64% → 66% methanol in water, 12~17min, 66% → 80% methanol in water, 17~25min, 80% methanol in water; Or 0~7min, 60% → 64% methanol in water, 7~15min, 64% methanol in water, 15~20min64% → 80% methanol in water, 20~25min, 80% methanol in water; Or
0~7min, 60% → 64% methanol in water, 7~12min, 64% methanol in water, 12~20min64% → 80% methanol in water, 20~27min, 80% methanol in water; Or
0~7min, 60% → 64% methanol in water, 7~13min, 64% methanol in water.
As embodiment preferred, described solution such as degree such as grade is: in percent by volume, and 64% methanol in water.
As embodiment preferred, the concentration of ethanol water of the present invention is the aqueous solution of by volume 50%-60% ethanol.
The assay method of sanguisorbin I of the present invention can be used for the various aspects of field of medicaments, the present invention includes but be not limited in the garden burnet medicinal material, in the sanguisorbin extract, and various pharmaceutical preparations, as the content of the sanguisorbin I in the preparation of various intestines and stomach such as tablet, capsule, granule, injection or parenteral route administration and the mensuration of purity.
Sanguisorbin I standard items can prepare sanguisorbin I: Cao Aimin with reference to method of the prior art, Zhang Dongfang, Sha Ming etc., saponins compound separation, evaluation and assay thereof in the garden burnet. and Chinese herbal medicine, 2003,5 (34): 397~399 are prepared.
As embodiment preferred, the content assaying method of sanguisorbin I comprises in the described garden burnet medicinal material:
1) preparation of need testing solution: get the garden burnet medicinal material, pulverize, cross sieve No. four, about 0.4g, the accurate title, decide, and puts in the 100ml measuring bottle, the aqueous solution 80ml that adds 60% ethanol, shake up, ultrasonic 15min is put to room temperature, be settled to scale, shake up, filter, get analysis of subsequent filtrate sample introduction or centrifuging and taking supernatant promptly;
The preparation of reference substance solution: get the about 50mg of sanguisorbin I reference substance, the accurate title, decide, and puts in the 50ml measuring bottle, adds the aqueous solution dissolving of 60% ethanol and be settled to scale, shakes up; Precision is measured in 5.00ml and 25.00ml to the 50ml measuring bottle respectively, and the aqueous solution dilution that adds 60% ethanol is settled to scale, shakes up, and promptly makes the reference substance solution that every 1ml contains 0.1mg and 0.5mg;
2) assay: accurate respectively reference substance solution and the need testing solution 10 μ l of drawing, inject high performance liquid chromatograph, measure the peak area of reference substance solution and need testing solution, peak area integrated value and concentration are got common logarithm respectively after, press the content of external standard two-point method calculating sanguisorbin I;
Wherein, high performance liquid chromatography is that the stationary phase particle diameter is less than or equal to 5 μ m with the carbon octadecyl silane, moving phase is that methyl alcohol and water volume are 64%: 36% isocratic elution liquid or are the gradient eluent of the methanol-water solution of 60-64% for the methyl alcohol volumetric concentration, elution program is 0~7min, 60% → 64% methanol in water, 7~13min, 64% methanol in water flow velocity 0.8ml/min, 25 ℃ of column temperatures, the ELSD drift tube temperature is 80 ℃, gas flow rate 2.5L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 4 * 10
3
As embodiment preferred, the content assaying method of sanguisorbin I comprises in the described sanguisorbin extract:
1) preparation of need testing solution: get radix sanguisorbae total saponin powder 50mg, the accurate title, decide, and puts in the 100ml measuring bottle, adds the aqueous solution 60ml of 60% ethanol, shake up, ultrasonic 5min is put to room temperature, is settled to scale, shake up, filter, get subsequent filtrate or the analysis of centrifuging and taking supernatant sample introduction;
The preparation of reference substance solution: get the about 50mg of sanguisorbin I reference substance, the accurate title, decide, and puts in the 50ml measuring bottle, adds the aqueous solution dissolving of 60% ethanol and be settled to scale, shakes up; Precision is measured in 5.00ml and 25.00ml to the 50ml measuring bottle respectively, and the aqueous solution dilution that adds 60% ethanol is settled to scale, shakes up and promptly makes the reference substance solution that every 1ml contains 0.1mg and 0.5mg;
2) assay: accurate respectively reference substance solution and the need testing solution 10 μ l of drawing, inject high performance liquid chromatograph, measure the peak area of reference substance solution and need testing solution, peak area integrated value and concentration are got common logarithm respectively after, press the content of external standard two-point method calculating sanguisorbin I;
Wherein, high performance liquid chromatograph is less than or equal to 5 μ m with the carbon octadecyl silane for the stationary phase particle diameter, with the methyl alcohol volumetric concentration is the methanol-water mixed solvent gradient elution of 60-64%, elution program is 0~7min, 60% → 64% methanol in water, 7~13min, 64% methanol in water, flow velocity 1.2ml/min, 25 ℃ of column temperatures, ELSD (Alltech 2000 ES) drift tube temperature is 100 ℃, gas flow rate 3.5L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 4 * 10
3
As embodiment preferred, the content assaying method of sanguisorbin I comprises in the described garden burnet tablet:
1) preparation of need testing solution: get 20 of Diyushengbai Tablets, the accurate title, decided porphyrize, precision takes by weighing the amount that is equivalent to 2mg sanguisorbin I, put in the 150ml tool plug conical flask, accurately add 50% ethanol 20ml, shake up, weigh, ultrasonic 10min is put to room temperature, supplies the weight that subtracts mistake with the aqueous solution of 50% ethanol, shake up, the centrifuging and taking supernatant promptly;
The preparation of reference substance solution: it is an amount of to be taken at 105 ℃ of sanguisorbin I reference substances that are dried to constant weight, and the aqueous solution dissolving and the constant volume that add 50% ethanol are made the reference substance solution that every 1ml contains 0.05mg and 0.2mg;
2) assay: accurate respectively reference substance solution and the need testing solution 20 μ l of drawing, inject liquid chromatograph, measure the peak area of reference substance solution and need testing solution, peak area integrated value and concentration are got common logarithm respectively after, press the content of external standard two-point method calculating sanguisorbin I;
Wherein, high performance liquid chromatograph, the carbon octadecyl silane that is less than or equal to 5 μ m with particle diameter is a stationary phase, with the methanol-water volume ratio is that 64: 36 mixed solution is an isocratic elution liquid, or be the methanol-water mixed solvent gradient elution of 60-64% with the methyl alcohol volumetric concentration, elution program is 0~7min, 60% → 64% methanol in water, 7~13min, 64% methanol in water, flow velocity 1.0ml/min, 25 ℃ of column temperatures, ELSD drift tube temperature are 85 ℃, gas flow rate 2.8L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 4 * 10
3
As embodiment preferred, the method for detecting purity of described sanguisorbin I comprises:
1) preparation of sample solution: it is an amount of to get sanguisorbin I, adds dissolve with methanol and is diluted to the solution that every 1ml contains 0.5mg, promptly;
2) purity is measured: the accurate sample solution 10 μ l that draw, inject liquid chromatograph, and measure, press the purity that the peak area normalization method is calculated sanguisorbin I;
Wherein, described high performance liquid chromatograph is a stationary phase with the carbon octadecyl silane, particle diameter is less than or equal to 5 μ m, with the methyl alcohol volumetric concentration is the methanol-water mixed solvent gradient elution of 60-64%, elution program is 0~7min, 60% → 64% methanol in water, 7~12min, 64% methanol in water, 12~20min, 64% → 80% methanol in water, 20~27min, 80% methanol in water, flow velocity 1.0ml/min, 25 ℃ of column temperatures, ELSD (Alltech 2000ES) drift tube temperature is 85 ℃, gas (air) flow velocity 2.8L/min, shunt mode not, theoretical cam curve is calculated by sanguisorbin I should be not less than 4 * 10
3
Compared with prior art, the present invention provides method fast and accurately for sanguisorbin I Determination on content in garden burnet medicinal material and extract or the preparation, sanguisorbin I and its chromatographic peak that is close to previously (isomers 3 β that structure is very close-0-α-L-arabopyranose-28-β-D glucopyranosyl ester-19 Alpha-hydroxies-oleanolic acid) can be realized baseline separation; And appearance time is short, only is 10min.
According to foregoing of the present invention,, under the prerequisite that does not break away from the above-mentioned basic fundamental thought of the present invention, can also make modification, replacement and the change of other various ways according to the ordinary skill knowledge and the conventional techniques means of this area.
Embodiment
By the following examples the present invention is described in further detail again, but this should be interpreted as that the present invention only limits to following example, all technology that realizes based on foregoing of the present invention all belong to scope of the present invention.
The selection of embodiment 1 high performance liquid chromatography chromatographic column, moving phase and elution program
Sanguisorbin belongs to triterpenoid saponin, and polarity is bigger, and experiment shows that it withs a hook at the end on the C18 chromatographic column, therefore selects the C18 analytical column for use.
The selection of moving phase: sanguisorbin I is a neutral compound, need not to add soda acid additives or ion-pairing agent in the moving phase.Therefore select flow phase system contrast screenings such as methanol-water, acetonitrile-water, the acetonitrile-water system is than methanol-water system baseline straightening in ultraviolet detection, peak shape is sharp-pointed, but it is still few than the methanol-water system through repeatedly adjusting the separation chromatography peak, and no matter adopting isocratic elution still is that the impurity peaks that is close to previously of gradient elution sanguisorbin I can't detect (seeing Fig. 1 a and 1b) fully, and sanguisorbin I peak area obviously increases than the methanol-water system, and both can obtain certain separation (R=1.2) in the methanol-water system, therefore select the methanol-water system.According to the degree of separation variation tendency, moving phase is adjusted into gradient elution, see table 1 for details.
Table 1 eluent gradient elution program
Numbering |
Elution program |
A? |
0~7min, 47% methanol in water, 7~25min, 47% → 80% methanol in water, 25~35min, 80% methanol in water |
B? |
0~17min, 60% → 70% methanol in water, 17~25min, 70% → 80% methyl alcohol |
?
? |
Aqueous solution, 25~35min, 80% methanol in water |
?C? |
0~7min, 60% → 64% methanol in water, 7~15min, 64% methanol in water, 15~20min, 64% → 80% methanol in water, 20~25min, 80% methanol in water |
?D? |
0~7min, 60% → 64% methanol in water, 7~12min, 64% → 66% methanol in water, 12~17min, 66% → 80% methanol in water, 17~25min, 80% methanol in water |
The result shows, in elution program B, C, D, sanguisorbin I and the impurity peaks separating effect basically identical (R=1.2) that is close to previously, sanguisorbin I goes out the peak at 7~12min of isocratic elution (64% methanol in water), retention time 10min, so elution requirement is optimized and revised and is 0~7min60% → 64% methanol in water, 7~12min, 64% methanol in water, 12~20min, 64% → 80% methanol in water, 20~27min, 80% methanol in water.And for assay, main peak wash-out to be measured comes out to get final product, and therefore when the sanguisorbin I in the sample was carried out assay, elution requirement can be reduced to 0~7min, 60% → 64% methanol in water, 7~13min, 64% methanol in water.
The key that sanguisorbin I analysis condition is selected is itself and the chromatographic peak realization baseline separation that is close to previously, and the sample separation complexity of separate sources differs, and the medicinal material sample is better, the total glycosides of garden burnet and preparation takes second place, sanguisorbin I reference substance is the most difficult; All be with C in front in the selection of moving phase
18Post (4.6 * 150mm, 5 μ m) is the basis, has investigated conventional analysis post ZORBAX XDB-C again respectively under selected elution requirement
18Post (4.6 * 150mm, 5 μ m), Luna C
18Post (4.6 * 150mm, 5 μ m) and small particle diameter post YMC-Pack proC
18Post (4.6 * 150mm, 3.5 μ m), Synergi Hydro-RP C
18Post (4.6 * 150mm, 4 μ m) is to the separating effect of garden burnet saponin I.The result shows, at particle diameter less 3.5 μ m and 4 μ m C
18On the analytical column in the reference substance sanguisorbin I and this impurity peaks all can reach baseline separation (R>1.5).Under the above-mentioned condition of determining, the about 10min of sanguisorbin I chromatographic peak retention time; Each composition can all flow out chromatographic column (purity test) in the garden burnet sample in 27min, sanguisorbin I chromatographic peak tailing factor 1.1, and theoretical cam curve is greater than 1 * 10
4, the peak degree of separation meets the requirement of HPLC assay method greater than 1.5.
When being used for assay, conventional analysis post (diameter 4.6mm * 150mm/250mm, 5 μ m) and 50~80% methyl alcohol isocratic elutions by changing chromatogram column length, flow velocity or column temperature, all can satisfy separation requirement.
Embodiment 2 chromatographic column particle diameters are to the influence of the separating effect of garden burnet saponin I reference substance
(1) sample solution preparation: it is an amount of to get sanguisorbin I crude product, adds dissolve with methanol and is diluted to the solution that every 1ml contains 0.5mg, promptly;
(2) chromatographic condition: with the methanol-water system is the eluent gradient wash-out, elution program is 0~7min, 60% → 64% methanol in water, 7~12min, 64% methanol in water, 12~20min, 64% → 80% methanol in water, 20~27min, 80% methanol in water, flow velocity 1.0ml/min, 25 ℃ of column temperatures detect wavelength 210nm, ELSD:85 ℃, 2.8L/min, gainl; Investigated YMC-Pack proC
18Post (150 * 4.6mm, 3.5 μ m) (ultraviolet detection) and SynergiHydro-RP C
18Post (150 * 4.6mm, 4 μ m) (ELSD detection) to the separating effect of garden burnet saponin I, the results are shown in Figure 2.
Fig. 2 result shows, is less than or equal at particle diameter that sanguisorbin I main peak is separated fully with front next-door neighbour's impurity peaks peak energy on the chromatographic column of 5 μ m.
Embodiment 3 methanol-water system isocratic elutions separating to sanguisorbin I in the total glycosides of garden burnet medicinal material and garden burnet
(1) medicinal material sample solution preparation: get the about 0.4g of garden burnet medicinal powder (crossing sieve No. four), the accurate title, decide, put in the 100ml measuring bottle, add the aqueous solution 80ml of 60% ethanol, shake up, ultrasonic 15min, put to room temperature, be settled to scale, shake up, filter and to get the analysis of subsequent filtrate sample introduction or centrifuging and taking supernatant promptly.
(2) preparation of the total glycosides sample solution of garden burnet: it is an amount of to get the garden burnet medicinal material coarse powder, adding 10 times of volume decoctings boils, each 1h boils three times altogether, filters, merging filtrate, last macroporous absorbent resin, distilled water fully washs, the back aqueous solution wash-out of volumetric concentration 70% ethanol, merge eluent and concentrated, be drying to obtain the radix sanguisorbae total saponin powder.Get the about 50mg of the total glycosides powder of garden burnet, accurate claim surely, put in the 100ml measuring bottle, add 60% ethanol 60ml, shake up, ultrasonic 5min is put to room temperature, is settled to scale, shakes up, and filters to get the analysis of subsequent filtrate sample introduction or centrifuging and taking supernatant promptly;
(3) chromatographic condition: with the methanol-water system is the moving phase isocratic elution, flow velocity 0.8~1.5ml/min, 25 ℃~40 ℃ of column temperatures, ELSD:85 ℃, 2.8L/min, gain1; Investigated Synergi Hydro-RP C respectively
18Post (150 * 4.6mm, 4 μ m), Gemini C
18Post (150 * 4.6mm, 5 μ m) and luna C
18Post (250 * 4.6mm, 5 μ m) the results are shown in Figure 3 to the separating effect of garden burnet saponin I and its front next-door neighbour's impurity peaks.
The result shows, for samples such as garden burnet medicinal material and radix sanguisorbae total saponin extracts, particle diameter less than the chromatographic column of 5 μ m on 50%~80% methanol in water isocratic elution sanguisorbin I and the impurity peaks that is close to previously can be realized baseline separation, the methanol-water isocratic elution can be realized baseline separation too on the chromatographic column of 5 conventional μ m.
The separation of sanguisorbin I in the embodiment 4 garden burnet medicinal materials
(1) sample solution preparation: get the garden burnet medicinal material, pulverize, cross sieve No. four, about 0.4g, precision claims fixed, put in the 100ml measuring bottle, add the aqueous solution 80ml of 60% ethanol, shake up, ultrasonic 15min, put to room temperature, be settled to scale, shake up, filter and to get the analysis of subsequent filtrate sample introduction or centrifuging and taking supernatant promptly.
(2) chromatographic condition: ZORBAX XDB-C
18Post (4.6 * 150mm, 5 μ m) on, flow velocity 1.0ml/min, 25 ℃ of column temperatures detect wavelength 210nm, and (elution program is 0~7min, 60% → 64% methanol in water to use methanol-water system gradient elution respectively, 7~12min, 64% methanol in water, 12~20min, 64% → 80% methanol in water, 20~27min, 80% methanol in water) with the acetonitrile-water system sanguisorbin I in the medicinal material is separated, the results are shown in Figure 4.
Fig. 4 result shows that the methanol-water system can separate the assorted peak of sanguisorbin I and its next-door neighbour in the garden burnet medicinal material fully, and acetonitrile-water then can not separate the two.
Assay and the method validation of sanguisorbin I in the embodiment 5 garden burnet medicinal materials
Content assaying method:
(1) chromatographic condition and system suitability test: with the carbon octadecyl silane is stationary phase (4.6 * 150mm, particle diameter 4 μ m), methanol-water mixed solvent gradient elution, elution program are (0~7min, 60% → 64% methanol in water, 7~13min, 64% methanol in water), flow velocity 0.8ml/min, 25 ℃ of column temperatures, ELSD drift tube temperature are 80 ℃, gas (air) flow velocity 2.5L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 4 * 10
3
(2) preparation of need testing solution: get the about 0.4g of garden burnet medicinal powder (crossing sieve No. four), the accurate title, decide, put in the 100ml measuring bottle, add the aqueous solution 80ml of 60% ethanol, shake up, ultrasonic 15min, put to room temperature, be settled to scale, shake up, filter and to get the analysis of subsequent filtrate sample introduction or centrifuging and taking supernatant promptly.
(3) preparation of reference substance solution: get the about 50mg of sanguisorbin I reference substance, the accurate title, decide, and puts in the 50ml measuring bottle, adds the aqueous solution dissolving of 60% ethanol and be settled to scale, shakes up; Precision is measured in 5.00ml and 25.00ml to the 50ml measuring bottle respectively, and the aqueous solution dilution that adds 60% ethanol is settled to scale, shakes up and promptly makes the reference substance solution that every 1ml contains 0.1mg and 0.5mg;
(4) content assaying method: accurate respectively reference substance solution and the need testing solution 10 μ l of drawing, inject liquid chromatograph, measure the peak area of reference substance solution and need testing solution, after peak area integrated value and concentration got common logarithm respectively, the content that calculates sanguisorbin I by the external standard two-point method was (in dry product) 3.340%.
Method validation:
(1) under selected chromatographic condition, sanguisorbin I has stronger chromatographic peak and degree of separation preferably in the garden burnet medicinal material, and solvent is interference measurement not, sees Fig. 5.The result shows that this method has higher specificity.
(2) linearity
Accurate compound concentration is 0.0998mg/ml, 0.1996mg/ml, 0.2
Each 10ml of sanguisorbin I reference substance solution of mg/ml, 0.3992mg/ml, 0.4990mg/ml, accurately draw 10 μ l and inject liquid chromatograph, measure by above-mentioned condition, common logarithm with the peak area integrated value is an ordinate, the common logarithm of sanguisorbin I solution concentration is that horizontal ordinate carries out straight-line regression, linear equation is logA=1.5846logC+7.1419 (r=0.9998), shows that sanguisorbin I has the good linear relation in 0.998 μ g~4.990 μ g scopes.
Table 2 linear relationship measurement result
(3) precision
Repeatability
Get garden burnet medicinal powder (crossing sieve No. four) 0.4g respectively, the accurate title, decide, and prepares 6 parts by the test sample preparation method, the accurate subsequent filtrate 10 μ l sample introductions of drawing, measure the peak area of sanguisorbin I, calculate content with the external standard two-point method after peak area integrated value and concentration are got common logarithm, the results are shown in Table 3.
The repeated measurement result of table 3
The result shows that this law repeatability is good.
Withinday precision
Get sanguisorbin I contrast solution A (0.0998mg/ml), B (0.499mg/ml) and garden burnet medicinal material need testing solution, by 0,2,4, in 6,8 hour time interval, measure sanguisorbin I peak area respectively, calculate content with the external standard two-point method after peak area integrated value and concentration got common logarithm, the results are shown in Table 4.
Table 4 withinday precision measurement result
The result shows that this law withinday precision is good.
Day to day precision
Get the contrast liquid of withinday precision and test liquid respectively at the 0th, 1,2,3 day (d) sample introduction, measure sanguisorbin I peak area, calculate content with the external standard two-point method after peak area integrated value and concentration are got common logarithm, the results are shown in Table 5.
Table 5 day to day precision measurement result
The result shows that the day to day precision of this law is good.
(4) application of sample recovery test
Get garden burnet medicinal powder (the crossing sieve No. four) 0.2g of known content, the accurate title, decide, put in the measuring bottle of 100ml, accurate respectively sanguisorbin I reference substance solution 1,2, the 3ml that adds 5.020mg/ml, supply 80ml with the aqueous solution of 60% ethanol again, by 3.7 following need testing solution preparation method preparations, promptly.Precision is measured subsequent filtrate 10 μ l sample introductions, and the record peak area calculates content with the external standard two-point method after peak area integrated value and concentration got common logarithm, the results are shown in Table 6.
Table 6 determination of recovery rates result
The result shows that this law average recovery meets the requirements, and accuracy is higher.
The assay of sanguisorbin I in embodiment 6 Diyushengbai Tablets
Content assaying method:
(1) chromatographic condition and system suitability test: with the carbon octadecyl silane is stationary phase (4.6 * 150mm, particle diameter is less than 5 μ m), methanol-water (64: 36) isocratic elution, flow velocity 1.0ml/min, 25 ℃ of column temperatures, ELSD (Alltech 2000) drift tube temperature is 85 ℃, gas (air) flow velocity 2.8L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 4 * 10
3
(2) preparation of need testing solution: get 20 of Diyushengbai Tablets (Chengdu Diao Pharmaceutical Group self-sufficient and strategically located region medicine company is produced, lot number 070301), the accurate title, decide, porphyrize, precision take by weighing in right amount (being equivalent to sanguisorbin I 2mg approximately), put in the 150ml tool plug conical flask, accurately add 50% ethanol 20.00ml, shake up, weigh, ultrasonic 10min, put to room temperature, supply the weight that subtracts mistake with 50% ethanol, shake up, the centrifuging and taking supernatant promptly;
(3) preparation of reference substance solution: get the about 25mg of sanguisorbin I reference substance, the accurate title, decide, and puts in the 50ml measuring bottle, adds the aqueous solution dissolving of 50% ethanol and be settled to scale, shakes up; Precision is measured in 5.00ml and 20.00ml to the 50ml measuring bottle respectively, and the aqueous solution dilution that adds 50% ethanol is settled to scale, shakes up and promptly makes the reference substance solution that every 1ml contains 0.05mg and 0.2mg;
(4) content assaying method: accurate respectively reference substance solution and the need testing solution 20 μ l of drawing, inject liquid chromatograph, measure the peak area of reference substance solution and need testing solution, after peak area integrated value and concentration got common logarithm respectively, the content that calculates sanguisorbin I by the external standard two-point method was the 0.18mg/ sheet.
Method validation:
(1) specificity: under selected chromatographic condition, sanguisorbin I has stronger chromatographic peak and degree of separation preferably in the Diyushengbai Tablet, and solvent and auxiliary material be interference measurement not, sees Fig. 6.The result shows that this method has higher specificity.
(2) linearity
Accurate compound concentration is each 10ml of sanguisorbin I reference substance solution of 0.05014mg/ml, 0.1003mg/ml, 0.2006mg/ml, 0.4011mg/ml, 0.5014mg/ml, accurately draw 20 μ l and inject liquid chromatograph, measure by above-mentioned condition, common logarithm with the peak area integrated value is an ordinate, the common logarithm of sanguisorbin I solution concentration is that horizontal ordinate carries out straight-line regression, linear equation is logA=1.6549logC+7.0118 (r=1), shows that sanguisorbin I has the good linear relation in 1.003 μ g~10.03 μ g scopes.
Table 7 linear relationship measurement result
(3) repeatability
Get the garden burnet medicinal material respectively and rise white sheet powder (lot number 070301, be equivalent to sanguisorbin I2mg approximately) about 1g, the accurate title, decide, prepare 5 parts by the test sample preparation method, the accurate subsequent filtrate 20 μ l sample introductions of drawing, measure the peak area of sanguisorbin I, calculate content with the external standard two-point method after peak area integrated value and concentration are got common logarithm, the results are shown in Table 8.
The repeated measurement result of table 8
The result shows that this law repeatability is good.
(4) application of sample recovery test
Get the Diyushengbai Tablet powder (lot number 070301 of known content (sanguisorbin I 0.18%), be equivalent to sanguisorbin I 1mg approximately) 0.5g, the accurate title, decide, put in the conical flask bottle of 150ml, accurate respectively sanguisorbin I reference substance solution 1,3, the 10ml that adds 0.3008mg/ml, supply 20ml with 50% ethanol again, press need testing solution preparation method preparation, promptly.Precision is measured subsequent filtrate 20 μ l sample introductions, and the record peak area calculates content with the external standard two-point method after peak area integrated value and concentration got common logarithm, the results are shown in Table 9.
Table 9 determination of recovery rates result
The result shows that this law average recovery meets the requirements, and accuracy is higher.
The Determination of Content Uniformity of sanguisorbin I in embodiment 7 Diyushengbai Tablets
(1) chromatographic condition and system suitability test: with the carbon octadecyl silane is stationary phase (4.6 * 150mm, particle diameter is less than 5 μ m), methanol-water (64: 36) isocratic elution, flow velocity 1.0ml/min, 25 ℃ of column temperatures, ELSD (Alltech 2000) drift tube temperature is 85 ℃, gas (air) flow velocity 2.8L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 4 * 10
3
(2) preparation of need testing solution: (Chengdu Diao Pharmaceutical Group self-sufficient and strategically located region medicine company is produced to get Diyushengbai Tablet, lot number 070301) 10, accurate respectively title is fixed, puts in the 5ml centrifuge tube, accurately add 50% ethanol 2.00ml, shake up, weigh, ultrasonic 10min, put to room temperature, supply the weight that subtracts mistake with 50% ethanol, shake up, the centrifuging and taking supernatant promptly;
(3) preparation of reference substance solution: get the about 25mg of sanguisorbin I reference substance, the accurate title, decide, and puts in the 50ml measuring bottle, adds 50% dissolve with ethanol and be settled to scale, shakes up; Precision is measured in 5.00ml and 20.00ml to the 50ml measuring bottle respectively, adds 50% ethanol dilution and is settled to scale, shakes up and promptly makes the reference substance solution that every 1ml contains 0.05mg and 0.2mg;
(4) content assaying method: accurate respectively reference substance solution 20 μ l and the need testing solution 20 μ l of drawing, inject liquid chromatograph, measure the peak area of reference substance solution and need testing solution, after peak area integrated value and concentration got common logarithm respectively, calculate the content of 10 middle sanguisorbin I respectively by the external standard two-point method, its RSD value should be no more than 7.0% (table 10, Fig. 7).
Table 10 Determination of Content Uniformity result
The assay of sanguisorbin I in embodiment 8 radix sanguisorbae total saponin extracts
(1) chromatographic condition and system suitability test: with the carbon octadecyl silane is stationary phase (4.6 * 150mm, particle diameter is less than 3.5 μ m), methanol-water mixed solvent gradient elution, elution program is 0~7min, 60% → 64% methanol in water, 7~13min, 64% methanol in water, flow velocity 1.2ml/min, 25 ℃ of column temperatures, ELSD (Alltech 2000ES) drift tube temperature is 100 ℃, gas (air) flow velocity 3.5L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 4 * 10
3
(2) preparation of need testing solution: it is an amount of to get the garden burnet medicinal material coarse powder, adding 10 times of volume decoctings boils, each 1h boils three times altogether, filters, merging filtrate, last macroporous absorbent resin, distilled water fully washs, back 70% ethanol elution, merge eluent and concentrated, be drying to obtain radix sanguisorbae total saponin powder (080604).Get the about 50mg of the total glycosides powder of garden burnet, accurate claim surely, put in the 100ml measuring bottle, add 60% ethanol 60ml, shake up, ultrasonic 5min is put to room temperature, is settled to scale, shakes up, and filters to get the analysis of subsequent filtrate sample introduction or centrifuging and taking supernatant promptly;
(3) preparation of reference substance solution: get the about 50mg of sanguisorbin I reference substance, the accurate title, decide, and puts in the 50ml measuring bottle, adds the aqueous solution dissolving of 60% ethanol and be settled to scale, shakes up; Precision is measured in 5.00ml and 25.00ml to the 50ml measuring bottle respectively, and the aqueous solution dilution that adds 60% ethanol is settled to scale, shakes up and promptly makes the reference substance solution that every 1ml contains 0.1mg and 0.5mg;
(4) content assaying method: accurate respectively reference substance solution and the need testing solution 10 μ l of drawing, inject liquid chromatograph, measure the peak area of reference substance solution and need testing solution, after peak area integrated value and concentration got common logarithm respectively, the content that calculates sanguisorbin I by the external standard two-point method was 50% (Fig. 8).
The purity testing of embodiment 9 sanguisorbin I reference substances
(1) chromatographic condition and system suitability test: with the carbon octadecyl silane is stationary phase (4.6 * 150mm, particle diameter is less than 5 μ m), methanol-water mixed solvent gradient elution, elution program is 0~7min, 60% → 64% methanol in water, 7~12min, 64% methanol in water, 12~20min64% → 80% methanol in water, 20~27min, 80% methanol in water, flow velocity 1.0ml/min, 25 ℃ of column temperatures, ELSD (Alltech 2000ES) drift tube temperature is 85 ℃, gas (air) flow velocity 2.8L/min, shunt mode not, theoretical cam curve calculate by sanguisorbin I should be not less than 9000;
(2) preparation of sample solution: it is an amount of to get sanguisorbin I, adds dissolve with methanol and is diluted to the solution that every 1ml contains 0.5mg, promptly;
(3) purity test method: the accurate sample solution 10 μ l that draw, inject liquid chromatograph, measure, press the peak area normalization method and calculate the purity of sanguisorbin I greater than 99.0% (Fig. 9).
The preparation of embodiment 10 sanguisorbin I reference substances
It is an amount of to get the garden burnet medicinal material coarse powder, adds 10 times of volume decoctings and boils, and each 1h boils three times altogether, filter, and merging filtrate, last macroporous absorbent resin, distilled water fully washs, and back 70% ethanol elution merges eluent and also concentrates, and is drying to obtain the radix sanguisorbae total saponin powder.With methyl alcohol (1g: 5ml) reflux 10min, filtered while hot treats that filtrate is chilled to room temperature, stirs to drip water down, and is muddy to occurring, and do not disappear, stop, leaving standstill 12h, suction filtration is with 30% ethanol washing precipitation, collect, vacuum drying is pulverized, time recrystallized product of winning.Recrystallization one to twice repeatedly again, sanguisorbin I.