34results about How to "Reliable Quality Control Methods" patented technology

The invention discloses a method for detecting quality of alkaloids in a Tibetan medicine herba aconiti tangutici and preparations thereof. The method comprises the steps of identification, check and content determination, wherein thin layer chromatography is adopted for identification and is characterized by taking a herba aconiti tangutici control medicine as the control and normal hexane-ethyl acetate-methanol-ammonia water as a developer; high performance liquid chromatography is adopted for check and is characterized by taking a mixed solution of an aconitine control substance, a hypaconitine control substance and a new aconitine control substance as the control, acetonitrile-tetrahydrofuran as a mobile phase A and an ammonium acetate water solution with glacial acetic acid as a mobile phase B to carry out gradient elution; high performance liquid chromatography is adopted for hordenine content determination and is characterized by taking a hordenine control substance as the control and an acetonitrile-potassium dihydrogen phosphate water solution as a mobile phase; and back titration is adopted for total alkaloid content determination. The method is stable and reliable, has strong specificity, can ensure the safety, effectiveness and quality controllability of the alkaloids in the Tibetan medicine herba aconiti tangutici and the preparations thereof, and has higher scientificity and application values.

The invention provides a quality detection method for tibetan medicine rhododendron anthopogonoide and a tibetan medicine rhododendron anthopogonoide preparation. The method includes: determining the total flavonoid content in the rhododendron anthopogonoide and the rhododendron anthopogonoide preparation by ultraviolet-spectrophotometry; simultaneously determining the total quercetin content in the rhododendron anthopogonoide and the rhododendron anthopogonoide preparation in the same chromatograph by high-performance liquid chromatography; and establishing a finger-print chromatogram of flavonoids in the rhododendron anthopogonoide and the rhododendron anthopogonoide preparation by the high-performance liquid chromatography. Therefore, quality of the rhododendron anthopogonoide and the rhododendron anthopogonoide preparation can be guaranteed by detecting whether common peaks exist in the finger-print chromatogram or not, and further medication safety for patients is guaranteed. The quality detection method is stable in sample solution, high in precision and excellent in reproducibility, has certain specificity, is good in separating effect of each characteristic constituent in the finger-print chromatogram, can be used for quality detection of rhododendron anthopogonoide medical materials, and is beneficial to guarantee of safety, effectiveness, controllability in quality and good clinical effect for the tibetan medicine rhododendron anthopogonoide and the tibetan medicine rhododendron anthopogonoide preparation.

The invention discloses a preparation method and a preparation control method of a mulberry leaf extract. The preparation method comprises the steps of cutting mulberry leaves into shreds, adding water, decocting and extracting for two times, combining two decoction-filtering liquors, filtering through a sieve, enabling a primary filtrate to pass through a microfiltration membrane with the bore diameter of 0.01 to 0.02 micron, enabling a refined filtrate to pass through a reverse osmosis membrane with the bore diameter of 0.0001 to 0.001 micron, concentrating until a solid content is 15 to 18 percent, performing vacuum concentration on a concentrated initial solution under 60 DEG C, to form an extractum with the relative density of 1.10 to 1.13, and spray-drying the extractum to obtain the mulberry leaf extract. A quality control method is characterized by adopting high efficiency liquid chromatography to measure the content of rutin in the mulberry leaf extract. The preparation method can avoid rutin content loss caused by washing a mulberry leaf medicinal material and performing high temperature concentration, the rutin in the mulberry leaves is well extracted and reserved, microorganisms such as bacteria can be well removed, and a microorganism indicator is enabled to meet national health food material regulations; the quality control method is accurate, reliable and good in repeatability, and can be taken as a method for measuring the content of the mulberry leaf extract rutin.

The invention discloses a content detection method for a compound houttuynia cordata mixture. The content detection method mainly includes that water-saturated normal butanol is used for extraction, water-alcohol elution is performed after column feeding, Phenyl bonded silica gel is taken as a chromatographic column, and mobile phase is acetonitrile-0.5% acetic acid solution (volume ratio is 18.5:81.5). By the content detection method, the problem that quercitrin which serves as a feature ingredient of the compound houttuynia cordata mixture cannot be controlled effectively is solved, content of quercitrin, baicalin and forsythin in the compound houttuynia cordata mixture is detected synchronously, and drug safety, effectiveness and quality controllability are guaranteed.

The invention relates to a method for detecting genotoxic impurities in candesartan cilexetil, and belongs to the technical field of medicine quality control. The detection method comprises the stepsof 1, preparing a reference substance solution; 2, preparing a test solution; 3, preparing a sample adding test solution; 4, taking Thermo Gold C18 as a chromatographic column, taking a methanol-watermixed solution with a volume ratio of 63:37 as a mobile phase A, and taking acetonitrile as a mobile phase B, wherein the detection wavelength is 240nm; introducing a sample and carrying out gradientelution according to a table 1, wherein the flow rate is 1.0 ml/min, the column temperature is 30 DEG C, and the sample size is 80[mu]l; and recording a chromatogram, and calculating the content of the genotoxic impurity NDBA. The invention provides an HPLC/UV detection method of genotoxic impurity NDBA in candesartan cilexetil.

The invention belongs to the field of medicine analysis, and particularly relates to a high performance liquid chromatography method for determining nicergoline related substances. According to the high performance liquid chromatography method, a filler obtained by mixing strong cation exchange resin and a reversed phase C18 according to a volume ratio of 1 to 4 is used as a filling agent, acetonitrile is used as a mobile phase A, a phosphate buffer is used as a mobile phase B, the mobile phase A and the mobile phase B are mixed according to a ratio of 30 to 70 for isocratic elution, the detection wavelength is 288nm, and the column temperature is 30 DEG C. By the high performance liquid chromatography method, the content of an impurity D can be accurately determined and known impurities C, B, A, G, F and H and other unknown impurities in nicergoline can be simultaneously determined.

The present inven relates to an isatis root preparation and its quality control method. First of all, said invention creates the following method and steps: using TCL to examine the isatis root preparation for that said isatis root medicinal material has the judgement method related to isatis leaf or not and isatis root preparation production process has the judgement standard for implementing alcohol precipition step or not; adopting HPLC quantitative analysis method of adenosine in isatis root medicinal material and isatis root preparation and providing quality control standard, and providing the adenosine content range in the isatis root medicinal materials from different sources and isatis root granules, said adenosine content range is 50-400 micrograms, so that said invention ensures normalization of production process and stable uniformity of quality.

The invention provides a quantitative analysis method for a medicinal material Ardisia mamillata Hance or extract thereof. The method employs high performance liquid chromatography-evaporation light scattering detection process (HPLC-ELSD) to determine the content of the active component ardisiacrispin B in the medicinal material Ardisia mamillata Hance or extract thereof, so the inherent quality of the medicinal material Ardisia mamillata Hance or extract thereof can be objectively and scientifically evaluated. The precision, stability, repeatability, sample recovery, tolerance and the like of the method all meet quantitative analysis requirements. The method is used for determining the contents of the medicinal material Ardisia mamillata Hance produced from different areas for the first time and provides a novel quality control and detection means for medicinal development of the component ardisiacrispin B.

The invention relates to a quality control method for a leech and a preparation containing the leech. The method takes succinic acid or sodium succinate as an index component, and carries out quality control on the leech and the preparation containing the leech through the qualitative and/or quantitative determination of the index component. The quality of the leech and the preparation containing the leech can be accurately controlled by the quality control method which can more reliably and more accurately evaluate the leech and the preparation containing the leech so as to improve the quality control level of medicaments and ensure the quality uniformity and the curative effect stability of the preparation.

The invention discloses a quality control method for a medicinal material of dotted ardisia, and relates to the technical field of traditional Chinese medicinal materials. The method comprises the following steps: (1) microscopically identifying medicinal material powder; (2) determining the water content, total ash content and extract content ranges of the medicinal materials: the water content is not more than 15.0%, the total ash content is not more than 9.0%, and the extract content is not less than 12.0% by using dilute ethanol as a solvent according to a hot dipping method under the condition of an alcohol-soluble extract determination method (the general rule 2201 of the four parts of the Chinese Pharmacopoeia 2015 edition); (3) thin-layer chromatography identification, in which inthe chromatogram of the test sample, fluorescence spots with the same color should be shown at the position corresponding to the chromatogram of the dotted ardisia reference medicinal material solution. The scientific, complete, reliable and effective quality control method for the dotted ardisia medicinal material is established, and the method is high in specificity and good in reproducibility;meanwhile, the quality standard of the dotted ardisia medicinal material is established by adopting the method, and the internal quality and the medication quality of the medicinal material can be effectively evaluated and controlled.

The invention belongs to the technical field of the medicinal material detection, especially a thin-layer chromatography identification of Solamum melongena and a quality control method thereof. The Solamum melongena can be identified through a Solamum melongena thin-layer chromatography identification method, a more reliable quality control method can be determined. Through the Solamum melongenathin-layer chromatography identification method provided by the invention, the obtained atlas has high definition, good separation degree, obvious spot and good reproducibility.

The invention discloses a quality control method of a radix cudramiae medicinal material, and relates to the technical field of traditional Chinese medicinal materials. The method comprises the following steps: (1) microscopically identifying medicinal material powder; (2) determining the water content, total ash content and extract content ranges of the medicinal materials: the water content is not more than 13.0%, the total ash content is not more than 6.0%, the extract is determined by a hot dipping method under the condition of an alcohol-soluble extract determination method (the general rule 2201 of the four parts of the Chinese Pharmacopoeia 2015 edition), and dilute ethanol is used as a solvent and is not less than 10.0%; and (3) thin-layer chromatography identification; wherein inthe chromatogram of the test sample, fluorescent spots with the same color should be shown at the position corresponding to the chromatogram of the kaempferol reference substance. The scientific, complete, reliable and effective quality control method for the radix cudramiae medicinal material is established, and the method is high in specificity and good in reproducibility; meanwhile, the qualitystandard of the radix cudramiae medicinal material is established by adopting the method, and the internal quality and the medication quality of the medicinal material can be effectively evaluated and controlled.