阅读说明：本技术 一种无患子三萜类皂苷成分的指纹图谱检测方法 (Fingerprint detection method for sapindus mukorossi triterpenoid saponin component ) 是由 吴泽君 陈珉珉 唐小鹏 李洪权 董华贵 吴茜 符春花 王亚 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种无患子三萜类皂苷成分的指纹图谱检测方法,包括步骤：1)制备参照物溶液和含无患子皂苷的供试品溶液；2)基于步骤1)的各溶液,采用高效液相色谱法得到参照物溶液和含无患子皂苷的供试品溶液的指纹色谱图；3)基于步骤2)的指纹色谱图生成无患子三萜类皂苷成分的对照指纹图谱,选择成分较高且分离度较好的色谱峰为特征峰,并确定为共有峰；4)将待测无患子果皮、无患子皂苷提取物原料的指纹色谱图与步骤3)的对照指纹图谱进行比较,相似度不低于0.90则判定为符合规定,相似度小于0.90则判定为不符合规定。该方法操作简便、稳定性高、重现性好,能全面反映皂苷成分信息,适用于无患子果皮及无患子皂苷提取物原料的质量控制。(The invention discloses a fingerprint detection method of sapindus triterpenoid saponin components, which comprises the following steps: 1) preparing a reference substance solution and a test solution containing sapindus saponin; 2) obtaining fingerprint chromatograms of a reference substance solution and a test solution containing sapindus saponin by adopting a high performance liquid chromatography based on each solution in the step 1); 3) generating a contrast fingerprint of the sapindus triterpenoid saponin component based on the fingerprint chromatogram of the step 2), selecting a chromatographic peak with higher component and better separation degree as a characteristic peak, and determining the peak as a common peak; 4) comparing the fingerprint chromatogram of the soapberry peel and soapberry saponin extract raw materials to be detected with the comparison fingerprint chromatogram in the step 3), judging that the similarity is not less than 0.90 and the similarity is less than 0.90, and judging that the similarity is not in accordance with the regulation. The method has simple operation, high stability and good reproducibility, can comprehensively reflect saponin component information, and is suitable for quality control of fructus Sapindi Mukouossi pericarp and fructus Sapindi Mukouossi saponin extract raw materials.)

1. A fingerprint detection method for triterpenoid saponin components of soapberry fruits is characterized by comprising the following steps:

1) preparing a reference substance solution and a test solution containing sapindus saponin;

2) obtaining fingerprint chromatograms of a reference substance solution and a test solution containing sapindoside by adopting a high performance liquid chromatography based on the solutions prepared in the step 1);

3) generating a comparison fingerprint of the triterpenoid saponin components of the soapberry based on the fingerprint chromatogram obtained in the step 2), selecting chromatographic peaks with higher main components and better separation degree as characteristic peaks, and determining the chromatographic peaks as common peaks;

4) comparing the fingerprint chromatogram of the soapberry peel and soapberry saponin extract raw materials to be detected with the comparison fingerprint chromatogram in the step 3), judging that the similarity is not less than 0.90 and the similarity is less than 0.90, and judging that the similarity is not in accordance with the regulation.

2. The fingerprint detection method according to claim 1, wherein the sample solution containing sapindoside in step 1) is a sample solution of sapindoside pericarp and a sample solution of sapindoside extract raw material.

3. The fingerprint detection method according to claim 2, wherein the preparation of the soapberry peel test solution comprises the following steps: drying Sapindus mukurossi pericarp, pulverizing into fine powder, weighing 0.5-1.5g, adding 6-70mL of methanol, ethanol or water, ultrasonic extracting for 15-45min, cooling to constant volume to 10-100mL measuring flask, filtering with filter membrane, and collecting the filtrate.

4. The fingerprint detection method according to claim 2, wherein the preparation of the sapindoside extract raw material test solution comprises the following steps: taking 0.05-0.2g of soapnut saponin extract raw material, adding 6-70mL of methanol or ethanol, performing ultrasonic extraction for 5-15min, cooling to constant volume to 10-100mL of measuring flask, filtering with filter membrane, and collecting the filtrate.

5. The fingerprint detection method according to claim 1, wherein the preparation of the reference solution comprises the following steps: precisely weighing a proper amount of a Rarasaponin III reference substance, adding methanol or ethanol to prepare a solution containing 200 mu g of 150-one per 1mL, shaking uniformly, and filtering by using a filter membrane to obtain the compound.

6. Root of herbaceous plantThe fingerprint detection method according to any one of claims 1 to 5, wherein the chromatographic conditions and system applicability test parameters in the step 2) measured by the HPLC method comprise: the chromatographic column is Agilent Eclipse plus C18 or Welch Xtimate C18 or Welch Ultimate C18 chromatographic column or other equivalent octadecylsilane chemically bonded silica chromatographic column with the column type of 4.6mm × 250mm and 5 μm; acetonitrile is taken as a mobile phase A, and water is taken as a mobile phase B; the gradient elution procedure was: 0-15 min, 25-40% A; 15-35 min, 40-43% A; 35-45 min, 43-50% A; 45-50 min, 100% A; the flow rate is 0.9-1.1 mL/min^-1The column temperature is 25-40 ℃; evaporative light scattering detector: the drift tube temperature is 95-115 ℃, and the carrier gas flow rate is 2.5-3.5 mL/min^-1The sampling amount is 10 mu L; the number of theoretical plates was not less than 5000 as calculated from the reference peak Rarasaponin III.

7. The fingerprint detection method according to any one of claims 2 to 4, wherein the number of batches of the soapberry pericarp test sample solution measured in step 2) is not less than 11 batches, and the number of batches of the soapberry saponin extract raw material test sample solution measured is not less than 11 batches.

8. The fingerprint detection method according to any one of claims 1 to 5 wherein at least 9 common peaks are determined in step 3).

9. The fingerprint detection method according to claim 8, wherein the relative retention time and the relative peak area of each common peak are calculated by using the peak corresponding to the reference substance as the S peak, and are controlled within the following limits:

10. the fingerprint detection method according to any one of claims 1 to 5, wherein the similarity determination in step 4) is performed by a traditional Chinese medicine chromatogram fingerprint similarity evaluation system.

Technical Field

The invention relates to a fingerprint detection method of sapindus mukorossi triterpenoid saponin components, and belongs to the technical field of biological detection.

Background

Sapindaceae (Sapindaceae) from Sapindaceae, commonly known as "linden tree, soapberry, soapbark tree", etc., the Latin school name Sapindus, which means "Indian soap". The compendium of materia medica records that the soapberry fruit can be used for washing hair and face, and the peel of the soapberry fruit contains abundant saponins, wherein most of the saponins are triterpenoid saponins, namely soapberry saponin, and the total content of the saponins is about 5.33 percent. The soapberry saponin is a natural nonionic surfactant, has low critical micelle concentration and surface tension, can obviously reduce the surface tension of water, has rich foam, fine hand feeling and strong detergency, can be degraded by 100 percent, cannot be harmful to human bodies and the environment after being used for a long time, and is more and more widely applied to the daily chemical industry, particularly washing products and cosmetics. At present, cosmetics and washing products added with sapindoside are sold in domestic markets, such as Dior, Gauss, Xianmei and the like.

At present, the soapberry saponin detection methods reported in the literature include fingerprint identification by high performance liquid chromatography, colorimetric method, high performance liquid chromatography, near infrared method content measurement and the like, but the existing fingerprint identification is the fingerprint of a soapberry saponin hydrolysate, the content is determined as the content of hederagenin of the soapberry saponin hydrolysate, and the existing methods cannot accurately and effectively evaluate the quality of the soapberry saponin because the sapogenin has no surface activity and cannot reflect the distribution and the content of a surface active component, namely, a soapberry triterpenoid saponin in a raw material. Experiments show that the surface activity and the foamability of the purchased partial batches of soapberry saponin extract raw materials are not in positive correlation with the content of soapberry saponin marked by a label, and the measured value of the saponin content of some batches is very high by the existing method, but the surface activity and the foamability are very poor, which indicates that the quality of the soapberry saponin extract raw materials in the existing market is not good and uneven, and the quality of the soapberry saponin extract raw materials cannot be effectively controlled by the existing method. Aiming at the defects of the prior art, a fingerprint method of triterpenoid saponin components in raw materials of soapberry peel and soapberry saponin extracts is needed to be established so as to reflect the information of the saponin components more comprehensively and control the quality of the raw materials of the peel and the soapberry saponin extracts more effectively.

Disclosure of Invention

Aiming at the technical problems, the invention provides a fingerprint detection method of sapindus mukorossi triterpenoid saponin components, which comprises the following steps:

1) preparing a reference substance solution and a test solution containing sapindus saponin;

2) obtaining fingerprint chromatograms of a reference substance solution and a test solution containing sapindoside by adopting a high performance liquid chromatography based on the solutions prepared in the step 1);

3) generating a comparison fingerprint of the triterpenoid saponin components of the soapberry based on the fingerprint chromatogram obtained in the step 2), selecting chromatographic peaks with higher main components and better separation degree as characteristic peaks, and determining the chromatographic peaks as common peaks;

4) comparing the fingerprint chromatogram of the soapberry peel and soapberry saponin extract raw materials to be detected with the comparison fingerprint chromatogram in the step 3), judging that the similarity is not less than 0.90 and the similarity is less than 0.90, and judging that the similarity is not in accordance with the regulation.

Further, the test solution containing sapindoside in the step 1) adopts a sapindus pericarp test solution and a sapindus saponin extract raw material test solution.

Further, the preparation of the soapberry peel test solution comprises the following steps: drying Sapindus mukurossi pericarp, pulverizing into fine powder, weighing 0.5-1.5g, adding 6-70mL of methanol, ethanol or water, ultrasonic extracting for 15-45min, cooling to constant volume to 10-100mL measuring flask, filtering with filter membrane, and collecting the filtrate.

Further, the preparation of the soapberry saponin extract raw material test solution comprises the following steps: taking 0.05-0.2g of soapnut saponin extract raw material, adding 6-70mL of methanol or ethanol, performing ultrasonic extraction for 5-15min, cooling to constant volume to 10-100mL of measuring flask, filtering with filter membrane, and collecting the filtrate.

Further, the preparation of the reference solution comprises the following steps: precisely weighing a proper amount of a RarasaponinIII reference substance, adding methanol or ethanol to prepare a solution containing 200 mu g of 150-one per 1mL, shaking up, and filtering by using a 0.45 mu m organic filter membrane to obtain the compound.

Further, the chromatographic conditions and system applicability test parameters in the step 2) of the hplc determination include: the chromatographic column is Agilent eclipsplus C18 or Welch XtimeateC 18 or Welch UltimateC18 chromatographic column or other equivalent octadecylsilane chemically bonded silica chromatographic column with the column type of 4.6mm multiplied by 250mm and 5 mu m; acetonitrile is taken as a mobile phase A, and water is taken as a mobile phase B; the gradient elution procedure was: 0-15 min, 25-40% A; 15-35 min, 40-43% A; 35-45 min, 43-50% A; 45-50 min, 100% A; 50-55 min, 25% A; the flow rate is 0.9-1.1 mL/min^-1The column temperature is 25-40 ℃; evaporative light scattering detector: the drift tube temperature is 95-115 ℃, and the carrier gas flow rate is 2.5-3.5 mL/min^-1The sampling amount is 10 mu L; the number of theoretical plates was not less than 5000 as calculated from the reference peak RarasaponinIII.

Further, the batch number of the soapberry peel test solution measured in the step 2) is not less than 11 batches, and the batch number of the soapberry saponin extract raw material test solution is not less than 11 batches.

Further, at least 9 common peaks are determined in the step 3).

Further, the relative retention time and the relative peak area of each common peak are calculated by taking the corresponding peak of the reference substance as an S peak, and are controlled within the following limits:

further, the similarity judgment in the step 4) is implemented by a traditional Chinese medicine chromatogram fingerprint similarity evaluation system.

The invention has the following beneficial effects:

1. the fingerprint method for detecting the triterpene saponin components of the main surface active substances of the raw materials of the soapberry pericarp and the soapberry saponin extract by high performance liquid chromatography-evaporative light scattering is established for the first time, and the detection method is optimized, so that a more comprehensive target peak can be detected, the target peak is not influenced by baseline interference, the response value and the sensitivity are high, the separation degree between peaks is good, the overall peak characteristics of the soapberry triterpene saponin components can be better presented, the real component distribution of the soapberry saponin can be accurately reflected, and the method is suitable for the authenticity identification and the product quality control of the soapberry pericarp and soapberry saponin extract raw materials.

2. The running time is relatively short, less than 50 min.

Drawings

FIG. 1 is the HPLC-ELSD fingerprint of triterpenoid saponin from sapindus mukorossi peel in example 1;

FIG. 2 is HPLC-ELSD fingerprint of triterpenoid saponin component of Sapindus mukurossi Sapindus saponin extract raw material in example 1;

FIG. 3 is the HPLC-ELSD control fingerprint of triterpenoid saponin component in the sapindus mukorossi peel in example 1;

FIG. 4 is the HPLC-ELSD control fingerprint of triterpenoid saponin component of Sapindus mukurossi Sapindus saponin extract raw material in example 1;

FIG. 5 is the HPLC-ELSD control fingerprint of triterpenoid saponin component in the sapindus mukorossi peel in example 2;

FIG. 6 is the HPLC-ELSD control fingerprint of triterpenoid saponin component of Sapindus mukurossi Sapindus saponin extract raw material in example 2;

FIG. 7 is the HPLC-ELSD control fingerprint of triterpenoid saponin component in the sapindus mukorossi peel in example 3;

FIG. 8 is the HPLC-ELSD comparison fingerprint of triterpenoid saponin component of Sapindus mukurossi Sapindus saponin extract raw material in example 3.

Detailed Description

In order to facilitate an understanding of the invention, the invention is described more fully and in detail below, but the scope of the invention is not limited to the following specific examples.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.

The experimental conditions in the examples of the invention are as follows:

instrument and chromatographic conditions:

the instrument comprises the following steps: ultimate3000 Sammerfer high Performance liquid chromatograph (Alltech LSD6000 evaporative light Scattering Detector, U3000 Quaternary Low pressure gradient Pump, CM7.2 chromatography workstation)

Mobile phase A: acetonitrile

Mobile phase B: first-grade water

Flow rate: 0.9-1.1 mL/min^-1

Column temperature: 25-40 deg.C

Detector parameters: drift tube temperature 95-115 deg.c, carrier gas flow 2.5-3.5 L.min^-1。

Preparation of the solution

Preparation of reference solutions: precisely weighing appropriate amount of RarasaponinIII reference substance, adding methanol or ethanol to obtain solution containing 200 μ g per 1mL, shaking, and filtering with 0.45 μm organic filter membrane;

preparation of a test solution: drying and pulverizing fructus Sapindi Mukouossi pericarp into fine powder, weighing 0.5-1.5g, adding 6-70mL methanol, ethanol or water, and ultrasonic extracting for 15-45 min; taking 0.05-0.2g of soapnut saponin extract raw material, adding 6-70mL methanol or ethanol, ultrasonic extracting for 5-15min, cooling to constant volume to 10-100mL measuring flask, filtering with 0.45 μm filter membrane, and collecting the filtrate.

The raw material sources of the soapberry pericarp or soapberry saponin extract are shown in tables 1 and 2.

Table 1: sapindus pericarp collection condition table

Numbering	Name (R)	Collecting ground	Place of origin/manufacturer
				S1	Soapberry pericarp	Hunan you Zhou	Hunan Tanzhou you county
S2	Soapberry pericarp	Shanxi fortune city	Shanxi province
				S3	Soapberry pericarp	(Anhui)	(Anhui)
S4	Soapberry pericarp	Anhui Mazhou	(Anhui)
				S5	Soapberry pericarp	Taizhou Zhejiang	Zhejiang river
S6	Soapberry pericarp	Hunan you Zhou	Hunan Tanzhou you county
				S7	Soapberry pericarp	Shandong Jinan	Shandong (mountain east)
S8	Soapberry pericarp	(Anhui)	(Anhui)
				S9	Soapberry pericarp	Guangxi Yulin	Guangxi province
S10	Soapberry pericarp	Hebei Anguo	Hebei river
				S11	Soapberry pericarp	Hunan you Zhou	Hunan Tanzhou you county

TABLE 2 Sapindus saponin extract raw material Collection Table

Example 1

Establishment of HPLC-ELSD (high Performance liquid chromatography-evaporative light scattering) contrast fingerprint spectrum of soapberry peel and soapberry saponin extract raw materials

1. Results of the method

1.1, preparing reference substance solution: accurately weighing 10mg of the self-made reference substance, placing the self-made reference substance in a 50mL volumetric flask, ultrasonically dissolving the self-made reference substance in 30mL of methanol, cooling, fixing the volume, shaking up to prepare a solution containing 200 mu g of the self-made reference substance per 1mL, filtering the solution by using a 0.45 mu m microporous organic filter membrane, and taking the subsequent filtrate for later use by HPLC.

1.2, preparation of a test solution: collecting Sapindus mukurossi pericarp, drying, pulverizing into fine powder, weighing 1g, adding 30mL methanol, ultrasonic extracting for 10-30min, cooling, diluting to constant volume to 50mL, filtering with 0.45 μm microporous organic filter membrane, collecting the filtrate, and performing HPLC. Taking 0.1g of soapnut saponin extract raw material, adding 30mL of methanol, performing ultrasonic extraction for 10min, cooling to a constant volume of 50mL, filtering with a filter membrane, and taking a subsequent filtrate to obtain the soapnut saponin extract.

1.3, chromatographic conditions: chromatography column Agilent eclipsplus C18, 4.6mm X250 mm, 5 μm, column temperature 25 deg.C; evaporative light scattering detector conditions: drift tube temperature 105 deg.C, carrier gas flow rate 3.0 mL/min^-1；1.0mL·min^-1Gradient elution was performed according to the following table:

TABLE 3 gradient elution procedure

Time (min)	Mobile phase a (% by volume)	Mobile phase B (% by volume)
			0-15min	25→40％	75→60％
15-35min	40→43％	60→57％
			35-45min	43→50％	57→50％
45-50min	100％	0

1.4, establishing a fingerprint spectrum: measuring HPLC-ELSD fingerprints (shown in figures 1 and 2) of 11 batches of soapberry pericarp and 11 batches of soapberry saponin extract raw materials, analyzing and comparing to obtain a soapberry pericarp and soapberry saponin extract raw material HPLC-ELSD comparison fingerprint (shown in figures 3 and 4) which is composed of common characteristic peaks, wherein the RarasaponinIII comparison product is used as a reference substance S peak, and calculating the relative retention time and the relative peak area of the common peaks of the 11 batches of soapberry pericarp and the 11 batches of soapberry saponin extract raw materials to be shown in Table 4.

2. Methodology investigation

Precision test

A soapberry peel sample with the source number of S1 is taken, a sample solution is prepared according to the method under item 1.2, sample introduction is carried out for 6 times continuously, the peak 6 is taken as a reference peak, the relative retention time of the common peak 1-9 and the RSD value of the relative peak area are both calculated to be less than 2 percent (shown in tables 5 and 6), and meanwhile, similarity evaluation software is used for calculating that the similarity of each spectrum fingerprint is greater than 0.99, which indicates that the precision of the instrument is good.

TABLE 5 fingerprint precision test results (relative retention time)

TABLE 6 fingerprint precision examination results (relative peak area)

Stability test

A soapberry peel sample with the source number of S1 is taken, a test solution is prepared according to the method under item 1.2, samples are respectively injected in 0 hour, 2 hours, 4 hours, 6 hours, 8 hours and 24 hours, the RSD value of the relative retention time and the RSD value of the relative peak area of the common peak of 1-9 are calculated to be less than 2 percent by taking the peak 6 as a reference peak (shown in the table 7 and the table 8), and meanwhile, similarity evaluation software is used for calculating that the similarity of each spectrum fingerprint is more than 0.99, which indicates that the test solution is stable in 24 hours.

TABLE 7 fingerprint stability test results (relative Retention time)

TABLE 8 fingerprint stability test results (relative peak area)

Reproducibility test

Taking soapberry peel samples with the source number of S1, precisely weighing 6 parts respectively, preparing a sample solution according to the method under item 1.2, injecting samples respectively, taking the peak 6 as a reference peak, calculating the relative retention time of the common peaks from 1 to 9 and the RSD value of the relative peak area to be less than 2 percent (shown in tables 9 and 10), and calculating the similarity of each spectrum fingerprint by using similarity evaluation software to be more than 0.99, thereby indicating that the method has good reproducibility.

TABLE 9 fingerprint reproducibility test results (relative retention time)

TABLE 10 results of reproducibility of finger-prints (relative peak area)

3 identification of common peak components of fingerprint of soapberry

Mass spectrum conditions: ESI ion source, positive and negative ion mode, capillary voltage 3500V, atomization chamber voltage 40psi, dry gas flow rate 10 L.min^-1The temperature of the heating capillary tube is 350 ℃, the in-source cracking voltage is 175V, the transmission voltage is 65V, the mass number scanning range m/z is 100-1000, and the collision energy is 20-25V.

The comparison of the reference substances for the experiment is combined with the mass-to-charge ratio of the compounds in the mass spectrogram of HPLC-MS-MS and related references to identify the main common peaks. Under experimental conditions, the saponin components in the test sample have better response to mass spectrum negative ion detection, and MS results are shown in Table 11.

TABLE 11 HPLC-MS-MS analysis of the major common peaks of Sapindus mukurossi

Example 2

Fingerprint detection method for soapberry pericarp and soapberry saponin extract raw materials

1. Results of the method

1.1, preparing reference substance solution: the same as in example 1.

1.2, preparation of a test solution: the same as in example 1.

1.3, chromatographic conditions: WelchXtimeateC 18, 4.6mm X250 mm, 5 μm, column temperature 30 ℃; evaporative light scattering detector conditions: drift tube temperature 105 deg.C, carrier gas flow rate 3.0 mL/min^-1(ii) a The amount of the sample was 10. mu.l. Acetonitrile is taken as a mobile phase A, and water is taken as a mobile phase B; flow rate 1.0 mL/min^-1The elution was carried out in a gradient as in example 1, Table 3.

1.4, fingerprint spectrum determination: precisely sucking 10 μ l of reference solution and sample solution respectively, injecting into liquid chromatograph, and measuring. The sample fingerprint should have chromatographic peak with retention time consistent with that of the reference peak, and should have 9 common peaks (see example 1), and the similarity is not less than 0.90 compared with the reference fingerprint of example 1 calculated by the traditional Chinese medicine chromatographic fingerprint similarity evaluation system software. The HPLC-ELSD control fingerprint of triterpenoid saponin in soapberry pericarp is shown in figure 5; the HPLC-ELSD control fingerprint of triterpenoid saponin component of Sapindus mukurossi Saponin extract is shown in figure 6.

Example 3

Fingerprint detection method for soapberry pericarp and soapberry saponin extract raw materials

1. Results of the method

1.1, preparing reference substance solution: the same as in example 1.

1.2, preparation of a test solution: the same as in example 1.

1.3 chromatography stripA piece: WelchUltimateC18, 4.6mm X250 mm, 5 μm, column temperature 30 ℃; evaporative light scattering detector conditions: drift tube temperature 105 deg.C, carrier gas flow rate 3.0 mL/min^-1(ii) a The amount of the sample was 10. mu.L. Acetonitrile is taken as a mobile phase A, and water is taken as a mobile phase B; flow rate 1.0 mL/min^-1The elution was carried out in a gradient as in example 1, Table 3.

1.4, fingerprint spectrum determination: precisely sucking 10 μ l of reference solution and sample solution respectively, injecting into liquid chromatograph, and measuring. The sample fingerprint should have chromatographic peak with retention time consistent with that of the reference peak, and should have 9 common peaks (see example 1), and the similarity is not less than 0.90 compared with the reference fingerprint of example 1 calculated by the traditional Chinese medicine chromatographic fingerprint similarity evaluation system software. The HPLC-ELSD control fingerprint of triterpenoid saponin in soapberry pericarp is shown in FIG. 7; the HPLC-ELSD control fingerprint of triterpenoid saponin component of Sapindus mukurossi Saponin extract is shown in figure 8.

Example 4

Fingerprint detection method for soapberry pericarp and soapberry saponin extract raw materials

1. Results of the method

1.1, preparing reference substance solution: the same as in example 1.

1.2, preparation of a test solution: the same as in example 1.

1.3, chromatographic conditions: WelchUltimateC18, 4.6mm X250 mm, 5 μm, column temperature 30 ℃; evaporative light scattering detector conditions: drift tube temperature 115 deg.C, carrier gas flow rate 3.5 mL/min^-1(ii) a The amount of the sample was 10. mu.L. Acetonitrile is taken as a mobile phase A, and water is taken as a mobile phase B; flow rate 1.1 mL. min^-1The elution was carried out in a gradient as in example 1, Table 3.

1.4, fingerprint spectrum determination: precisely sucking 10 μ l of reference solution and sample solution respectively, injecting into liquid chromatograph, and measuring. The sample fingerprint should have chromatographic peak with retention time consistent with that of the reference peak, and should have 9 common peaks (see example 1), and the similarity is not less than 0.90 compared with the reference fingerprint of example 1 calculated by the traditional Chinese medicine chromatographic fingerprint similarity evaluation system software.

Example 5

Fingerprint detection method for soapberry pericarp and soapberry saponin extract raw materials

1. Results of the method

1.1, preparing reference substance solution: the same as in example 1.

1.2, preparation of a test solution: the same as in example 1.

1.3, chromatographic conditions: WelchUltimateC18, 4.6mm X250 mm, 5 μm, column temperature 30 ℃; evaporative light scattering detector conditions: drift tube temperature 95 deg.C, carrier gas flow rate 2.5 mL/min^-1(ii) a The amount of the sample was 10. mu.L. Acetonitrile is taken as a mobile phase A, and water is taken as a mobile phase B; flow rate 0.9 mL/min^-1The elution was carried out in a gradient as in example 1, Table 3.

1.4, fingerprint spectrum determination: precisely sucking 10 μ l of reference solution and sample solution respectively, injecting into liquid chromatograph, and measuring. The sample fingerprint should have chromatographic peak with retention time consistent with that of the reference peak, and should have 9 common peaks (see example 1), and the similarity is not less than 0.90 compared with the reference fingerprint of example 1 calculated by the traditional Chinese medicine chromatographic fingerprint similarity evaluation system software.

The foregoing is only a preferred embodiment of the invention and is not intended to limit the scope of the invention, which is defined in the claims of the application, and any other technical entity or method implemented by others is exactly the same as or equivalent to the definition of the claims of the application, and is also intended to cover the equivalents of the claims of the invention.