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61results about How to "The method is reproducible" patented technology
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Method for measuring contents of coumarin and safrole in flavor and fragrance for cigarette
InactiveCN102072940AThe method is reproducibleImprove accuracyComponent separationAmount of substanceChromatography column
The invention provides a method for measuring contents of coumarin and safrole in flavor and fragrance for cigarette, which comprises the steps of: first, dispersing coumarin and safrole in flavor and fragrance for cigarette in an aqueous solution and extracting with an organic reagent, sampling, filtering and performing instrument analysis and content measurement by using gas chromatography-mass spectrometry; selecting phenylethyl propionate as an internal standard substance and selecting ions of phenylethyl propionate, coumarin and safrole with mass to charge ratios m / z which are respectively 104, 146 and 162 in the mass spectrogram for quantitative analysis; and drawing a standard curve by using an internal standard method and fitting the sample with the standard curve to obtain the contents of coumarin and safrole. By adopting the method, coumarin and safrole in flavor and fragrance for cigarette are more completely extracted; and in the process of extraction, interfering materials can be removed to an extreme extent so that the sample spectrum is purified and pollution of samples to the injection port of the instrument and the chromatographic column is reduced, thereby the demand of sample detection in batches in actual work is met.
Owner:中国烟草总公司湖北省公司
Method for determining content of free nicotine in tobaccos and tobacco products
ActiveCN102230924AFree from destructionAccurate and reliable measurement resultsComponent separationGas liquid chromatographicMass spectrometry
The invention discloses a method for determining the content of free nicotine in tobaccos and tobacco products, and the method provided by the invention comprises the following steps: carrying out solid-phase micro extraction on a tobacco powdery sample by using dimethyl polysiloxane / styrene as an extraction material; and carrying out quantitative analysis by using a gas chromatography mass spectrometer, thus obtaining the free nicotine determination result. Method evaluation data shows that the method has the advantages of accurate determination result, good reproducibility, less destructionof the balance between free nicotine and protonic nicotine and the like.
Owner:HONGYUN HONGHE TOBACCO (GRP) CO LTD
Transition metal based catalyst electrode of honeycomb macroporous structure as well as preparation method and application thereof
ActiveCN107008461AHigh catalytic efficiencyAvoid reunionPhysical/chemical process catalystsElectrolysis componentsMicrospherePolystyrene
The invention relates to a transition metal based catalyst electrode of a honeycomb macroporous structure as well as a preparation method and application thereof. The preparation method disclosed by the invention comprises the following steps: S1, synthesizing a polystyrene sub-microsphere aqueous solution; S2, preparing a transition metal salt solution, mixing the transition metal salt solution and the polystyrene sub-microsphere aqueous solution to obtain a mixed solution, spraying the mixed solution onto a conductive substrate for forming a film, and calcining at a high temperature so as to obtain an oxide film with a honeycomb macroporous structure; and S3, performing sulfidizing or selenizing or phosphating treatment on the oxide film at the high temperature in an inert atmosphere, thereby obtaining the transition metal based catalyst electrode of the honeycomb macroporous structure. The preparation method disclosed by the invention has the advantages that the operation is simple, the macroporous structure of the catalyst is easily maintained, the reproducibility is high, and a large-area electrode is conveniently prepared. Moreover, the catalyst electrode prepared by the invention has high specific surface area and capable of exposing more active sites and can be applied to dye-sensitized solar cells, electrochemical decomposition of water and the like.
Owner:SUN YAT SEN UNIV
Preparation method of porous cobaltosic oxide nanosheet
ActiveCN109516507AWide variety of sourcesLow costNanotechnologyCobalt oxides/hydroxidesSupercapacitorNanocrystal
The invention discloses a preparation method of a porous cobaltosic oxide nanosheet. By utilizing plant straws as a carbon source, so that the raw material source is wide, and the cost is low; the porous cobaltosic oxide nanosheet is prepared by virtue of an impregnation method and a secondary roasting method, the prepared porous cobaltosic oxide nanosheet is formed by Co3O4 nanocrystals with a good crystallization property, and the particle sizes of the Co3O4 nanocrystals are 5nm-20nm, so that the nanosheet has a relatively large specific surface area and rich pore structures. The porous cobaltosic oxide nanosheet has the advantages of high volume and long service life when being applied to supercapacitors.
Owner:ZHEJIANG UNIV OF TECH
Nonlinear finger-print detection method for traditional Chinese medicine fructus forsythiae
InactiveCN106324053AThe method is reproducibleSimple and fast operationMaterial electrochemical variablesForsythia suspensaMedicine
The invention discloses a nonlinear finger-print detection method for traditional Chinese medicine fructus forsythiae. The method comprises the following steps: A) establishing a nonlinear finger-print of the chemical component of fructus forsythiae, taking fructus forsythiae produced in same place and in same brand as a standard sample and establishing the nonlinear finger-print of the chemical component through chemical oscillation reaction; B) detecting the sample, taking a to-be-detected fructus forsythiae sample, detecting under the same condition of the standard sample, acquiring the finger-print of the detected sample, directly observing the two finger-prints and taking Origin software analysis as determining basis; C) viewing reproducibility, taking the to-be-detected fructus forsythiae sample and determining the finger-print thereof, wherein various characteristic parameters RSD of the detected nonlinear finger-print are less than 3%, so that the method has excellent reproducibility.
Owner:HANDAN COLLEGE
Electrochemical fingerprint identification of traditional Chinese medicine pawpaw
InactiveCN105067683AThe method is reproducibleNo preprocessing requiredMaterial electrochemical variablesChemical compositionDirect observation
The present invention relates to a pawpaw electrochemical fingerprint identification method, provides a method for identifying the authenticity of pawpaw through an electrochemical fingerprint, and belongs to the field of traditional Chinese medicine quality control. The method comprises: A, establishing a pawpaw chemical component fingerprint, wherein pawpaw with the same production place and the same brand is adopted as a standard substance, the electrochemical fingerprint of all component is established through an oscillation reaction, and results are shown in figure 1; and B, detecting a sample, wherein a pawpaw sample to be detected is detected under the same conditions as the standard substance so as to obtain the fingerprint of the detected sample, and the fingerprints of the standard substance and the detected sample are analyzed through a direct observation method or Origin software analysis so as to be adopted as the qualitative basis. According to the present invention, all components of the pawpaw are made into the fingerprint, the method has advantages of good reproducibility, no requirement of pretreatment, simple and fast operation, economy and the like, can provide reliable information for the identification of the quality of all types of pawpaw and the identification of the low-price pawpaw and the high-price pawpaw, and is suitable for promotion in the technical field of pawpaw safety detection.
Owner:查孝柱
Preparation method of zigzag Cu2MoS4 nanosheet and application in electrocatalysis and photocatalysis
InactiveCN105597786ARich sourcesThe method is reproduciblePhysical/chemical process catalystsWater/sewage treatment by irradiationPhotocatalytic degradationHydrogen production
The invention discloses a preparation method of a zigzag Cu2MoS4 nanosheet electrocatalyst and photocatalyt. The method is characterized by including the steps of synthesizing a Cu2O precursor and synthesizing a zigzag Cu2MoS4 nanosheet. The method has the advantages that the raw materials are abundant in source, the route is green, the method is good in repeatability, and large-scale synthesis can be achieved. The prepared material can be used for electrocatalysis hydrogen production and photocatalytic degradation. The reaction is efficient, operation is easy, the prepared material is high in stability, and good practical value and application prospects are achieved.
Owner:WENZHOU UNIVERSITY
Method and device for measuring crushing degree of tobacco shreds
ActiveCN101694435APredict physical qualityAccurately characterize resistance to crushingStrength propertiesForce factorEngineering
The invention relates to a method and a device for measuring the crushing degree of tobacco shreds. By the established crushing degree measuring method, not only the capability and the level of a material incoming end working procedure can be represented, but also the mass variation of the crushed tobacco shreds can be reflected through a crushing process, so that the physical quality of final cigarette products can be predicted. By utilizing the method and the device, the crushing of the tobacco shreds in any process can be studied, the self anti-crushing property of raw materials can be reflected, and the influence of external force factors, such as process flows, conditions and the like on the anti-crushing property thereof can be studied. The invention has the following advantages: by directly measuring the crushing degree of the tobacco shreds, the anti-crushing ability of the tobacco shreds is represented correctly and the size distribution conditions of the tobacco shreds before being crushed and after being crushed are reflected; the invention is of great significance in predicting the processing quality of the tobacco shreds and provides an effective measure for studying the crushing process of tobacco shreds; meanwhile, the invention has advantages of low sampling quantity, simple operation and good method reproducibility. The designed special crushing device has reasonable structure and can simulate the crushing degree of any processing on the tobacco shreds.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC +1
Detection method of nine-component heart-calming particle
ActiveCN103344738ANo distractionThe detection method is stableComponent separationMaterial analysis by optical meansSchisandra chinensisFern
The invention discloses a detection method of a nine-component heart-calming particle. The detection method of the nine-component heart-calming particle can carry out thin-layer chromatography on spina date seed, schisandra chinensis, corydalis tuber, cinnamon, asparagus fern and polygala tenuifolia in the nine-component heart-calming particle, microscopic identification on calcium oxalate in ginseng and determine HPLC (high performance liquid chromatography) content of ginsenoside Rg1 and ginsenoside Re. The detection method of the nine-component heart-calming particle has the characteristics of stability, high precision, good reproducibility, high recovery ratio and good separation effect. By adopting the detection method of the nine-component heart-calming particle, the quality of the nine-component heart-calming particle can be further comprehensively controlled, the provided method for determining the content of ginsenoside Rg1 and ginsenoside Re can realize good baseline separation effect on ginsenoside Rg1 and ginsenoside Re, and a determination result is accurate and the reproducibility is good.
Owner:BEIJING BEILU PHARM CO LTD
Liquid phase micro- extraction on-line preliminary treatment device for capillary pipe electrophoresis-ampere detector and its usage method
InactiveCN101308067AEfficient purificationEfficient ConcentrationPreparing sample for investigationMaterial analysis by electric/magnetic meansFiberHollow fibre
The invention provides a liquid phase micro-extraction device for complex matrix sample on-line pretreatment of a capillary electrophoresis-ampere detector as well as a usage method thereof, a liquid phase micro-pumping device of the device is fixed on a fixed mount, the lower end of the liquid phase micro-pumping device is nested with a section of U-shaped hollow fiber pipe, and a capillary sample inlet end and an electrode are inserted into the other end of the hollow fiber pipe, the U-shaped hollow fiber pipe is positioned in a sample container, and a stirring device is also arranged on the sample container; and the liquid phase micro-extraction in the complex matrix sample pretreatment can be implemented according to the device of the invention. The invention has a complex matrix sample liquid phase micro-extraction pretreatment device, a capillary electrophoresis device and an ampere detector connected together to form an integral device, the range of detected substances is extended, and the sensitivity, reproducibility, stability and reliability for separating capillary electrophoresis are improved; and the device has advantages of small volume, simple structure, simple operating method, low cost, good reproducibility of the method, and convenient sample analysis after pretreatment.
Owner:FUZHOU UNIV
Application of 8-hydroxydeoxyguanosine as urine marker
InactiveCN106370744AEasy to acceptReduce mental burdenComponent separationDisease riskLymphatic Spread
The invention provides an application of 8-hydroxydeoxyguanosine as a urine marker. The molecular formula of the 8-hydroxydeoxyguanosine is C10H13O5N5. In detection, collection of a sample is non-invasive, and the sample is easy to obtain and is large in acquisition quantity. Compared with FOBT test, the method is more acceptable for detectors and can reduce mental burden of work staff, and is more acceptable for common people. By means of optimized off-line solid-phase extraction technology with ultrahigh performance liquid chromatography-tandem mass spectrometry, the concentration of a DNA oxidative damage marker, 8-hydroxydeoxyguanosine, in urine of a to-be-tested subject can be accurately quantified, so that disease risk analysis to the subject can be carried out through an established colorectal cancer incidence prediction model. The urine marker, when being used for screening the colorectal cancer, is non-invasive, quick and high-flux. The detection method not only is suitable for early stage detection of the colorectal cancer but also is suitable for detection of metastasis or non-metastasis of the colorectal cancer. The application has excellent prospect.
Owner:ZHEJIANG UNIV
Kit capable of quickly detecting real properties of leather and detecting method of kit
ActiveCN102796826AQuality improvementImprove stabilityMicrobiological testing/measurementSocial benefitsDNA extraction
The invention discloses a kit capable of quickly detecting real properties of leather, and a detecting method of the kit. The kit comprises deoxyribonucleic acid (DNA) extraction buffer liquid, Taq DNA polymerase, polymerase chain reaction (PCR) liquid and sampling buffer liquid. The kit can be used for analyzing and identifying the compositions of genes of a leather sample from a genetics perspective, overcomes the shortcomings of conventional sensory identification, has the advantages of strong specificity, high sensitivity, good method reproducibility, rapidness, simplicity and convenience in detection and the like, fills the blank of leather gene detecting methods at present, serves as an accurate and easy-to-standardize analyzing method for identification of leather types, provides technical support for quality supervision and the like, can be widely applied to gene extraction of samples of leather including fur and the like, leather type identification and the like, has good economic and social benefits and great popularization and application values, and has major significance on effective supervision of leather product quality and protection of benefits of vast consumers.
Owner:GUANGZHOU QUALITY SUPERVISION & TESTING INST
Method for authenticating truth or falsity of polyurethane water-borne wood paint on the basis of nonlinear fingerprint graph
ActiveCN109556932AGuaranteed demulsification effectPromote stratificationPreparing sample for investigationMaterial analysis by electric/magnetic meansEmulsionReduced properties
The invention belongs to the technical field of water-borne wood paint authentication, and particularly relates to a method for authenticating the truth or falsity of polyurethane water-borne wood paint on the basis of a nonlinear fingerprint graph. A water-borne wood paint sample is subjected to preliminary treatment to quicken the layering of sample emulsion, so that an organic phase and an inorganic phase are fully separated, and an emulsion breaking effect on samples is guaranteed; the method is convenient for subsequent detection; if acrylic acid water-borne wood paint is doped in the polyurethane water-borne wood paint, during detection, acrylic acid emulsion subjected to acidolysis in sulfuric acid solution generates acrylic acid with reducing properties; and the above products aremixed in a B-Z vibration system consisting of H+, BrO3, Mn2+ and acrylic acid, a sample to be authenticated and a standard sample are compared according to the extraction characteristic parameters ofthe nonlinear fingerprint graph, and the variety as well as the truth or falsity of the sample to be authenticated can be authenticated according to an integral similarity. In addition, the method hasthe advantages of being good in reproducibility, short in operation time, economic and the like, and is suitable to be widely prompted and applied in authentication fields of the polyurethane water-borne wood paint.
Owner:HANDAN COLLEGE
Cryopreservation method for plant germplasm of Eriobotrya by using combined method of programmed freezing method and vitrification method
ActiveCN105475133ACreative improvementImprove survival rateHorticulture methodsPlant tissue cultureInsect diseaseShoot
The invention discloses a cryopreservation method for plant germplasm of Eriobotrya by using a combined method of a programmed freezing method and a vitrification method. The programmed freezing method and the vitrification method are scientifically and organically combined. Innovative improvements of key technology, such as a medium formula and a cryoprotectant formula for cryopreservation pretreatment of plant shoot tips of Eriobotrya, a cooling program design for cryopreservation of loquat shoot tips, a plant regeneration medium formula and a cultivation condition after cryopreservation of the plants of Eriobotrya, and the like are carried out. A novel program method for cryopreservation of plants of Eriobotrya with effect stability and high survival rate is innovated, and the survival rate is 90.0-97.50%. The method can be applied to cultivated species, wide species and interspecific hybridized materials of plants of Eriobotrya, and can replace plantation, so that manpower, material resources and land are saved; damages to loquat preservation during plantation due to insect diseases and natural disasters are prevented.
Owner:SOUTH CHINA AGRI UNIV
Extraction and separation method for rhubarb willow leaf flavone component
InactiveCN101012257ANo pollution in the processThe method is reproducibleSugar derivativesPlant ingredientsSephadex gelsSilica gel
The invention discloses an extracting separating method of flavone from rheum officinale Cynanchum, which is characterized by the following: affirming extracting condition through alcohol; setting the extracting quantity of ether and water stature butanol; comparing the relationship of flavone structure with silica gel thin-layer chromatography, gluglucosan gel thin-layer chromatography and polyamide thin-layer chromatography; affirming the approximate flavone compound to high-effective chromatographic separating purifying structure.
Owner:ZHEJIANG SCI-TECH UNIV
Method for determining microcystin MC-LR in water body
The invention discloses a method for determining microcystin MC-LR in a water body, which belongs to the technical field of environmental protection. The method for determining microcystin MC-LR in the water body utilizes glass fiber (GF) / C glass fiber filter paper to filter frustules in a water sample to be determined, and a solid-phase extraction column-SPE column which takes C18 silica gel as a filler to separate and purify the filtered water sample to be determined, a high performance liquid chromatography is used to detect, and then, the pre-obtained standard curves of the corresponding peak areas of microcystin MC-LR standard substances with different concentrations is utilized to calculate the content of the microcystin MC-LR in the water sample to be determined. The method for determining microcystin MC-LR in the water body has the advantages of simplicity in steps, convenience in operation, reduction in eluant usage and environmental toxicity, safety in operating personnel, low detection cost and the like, and the minimum detection limit is 0.002mg / L.
Owner:SHANGHAI INST OF TECH
Analysis detection method of iron element in vanadium carbide
InactiveCN102914513AImprove accuracyGood precisionColor/spectral properties measurementsCarbonizationAtomic absorption spectroscopy
The invention belongs to the field of analysis on difficulty-smelted compounds and discloses an analysis detection method of an iron element in vanadium carbide. The analysis method comprises the following analysis steps of: heating a sample by a nitric acid water solution to be dissolved; carrying out dry filtering on free carbon of an insoluble substance in the sample; preparing an iron standard solution and utilizing a substrate matching method to eliminate the inference on iron by vanadium; utilizing an atom absorption spectroscopy to measure the absorption value of an iron-based state atom; and calculating an analysis result according to a standard curve. The analysis detection method of the iron element in the vanadium carbide has the advantages of high sensitivity, simplicity and convenience for operation, and good reproducibility of the analysis result, and is suitable for measuring the iron content in the vanadium carbide.
Owner:长沙伟徽高科技新材料有限公司
Preparation of new drug delivery system based on liquid surface spray method
InactiveCN1879606BHigh yieldSmall particle sizePowder deliveryPharmaceutical product form changeDrugs solutionEngineering
The invention provides a delivery system for preparing novel drugs based on a liquid surface spraying method, which is a novel microparticle preparation method with great industrialization prospects. The delivery system of the new drug is prepared based on the liquid surface spray method. The solution containing the carrier material is miscible or suspended with the drug or the drug solution, and then atomized, and sprayed into the receiving liquid to form a particle preparation. The flow rate of the atomized liquid is 0.01-100ml / min, spray pressure 0.1-0.5MPa, preparation temperature 5-100°C. The invention has high yield and good method stability, and the whole preparation process of the invention is completed by instruments, which avoids the difference of human factors and greatly improves the yield. The particle size distribution is uniform and reproducible.
Owner:SHENYANG PHARMA UNIVERSITY
Detection method for contents of varieties of flavonoids in taxus chinensis branches and preparation method of contents of varieties of flavonoids in taxus chinensis branches.
ActiveCN108627596ASimple methodGood repeatabilityComponent separationChromatographic columnChemistry
The invention discloses a detection method for contents of varieties of flavonoids in taxus chinensis branches. The detection method is used for detecting contents of rutin, quercetin, amentoflavone,isoginkgetin and sciadopitysin and comprises the following steps: preparing a test sample solution; preparing a control product solution; performing high performance liquid chromatography measurementand respectively injecting the test sample solution and the control product solution into a high performance liquid chromatograph to be detected, wherein the chromatographic conditions are as following: C18 is utilized as a chromatographic column, a methyl alcohol-water mixed solution is utilized as a flow phase, gradient elution is performed, detection wavelength is 330nm, a flow velocity is 1.0mL / min, a column temperature is 30 DEG C, and the number of theoretical plates is not lower than 3000. The detection method disclosed by the invention utilizes the high performance liquid chromatography to detect contents of the rutin, the quercetin, the amentoflavone, the isoginkgetin and the sciadopitysin in the taxus chinensis branches at the same time; the method has the advantages of simpleness, good repeatability, high recovery rate, ability in accurately measuring the contents of 5 kinds of flavonoids in the taxus chinensis branches, convenience and quickness.
Owner:HUBEI XIANGRUIFENG ECOLOGICAL FRUIT IND CO LTD
Baobab sterile germination accelerating method and germination accelerating culture medium
InactiveCN109548428AImprove seed germination rate and transplant survival rateOvercoming high dormancyGrowth substratesCulture mediaAllium sativum extractSurvival rate
The invention discloses a baobab sterile germination accelerating method and a germination accelerating culture medium. The method includes: using concentrates sulfuric acid for acid etching, using aliquid detergent for flushing, using flowing water for flushing, using alcohol for soaking, using sterile water for flushing, using a HgCi2 solution for soaking, using sterile water for cleaning, andculturing a germination accelerating culture medium, wherein the germination accelerating culture medium contains cymbopogon distans extract, lemon grass extract, garlic extract, betaine and indolebutyric acid. The defect of high-degree dormancy of baobab seeds is overcome; by the method, baobab seed germination rate is up to higher than 90%, transplanting survival rate is up to higher than 88%, baobab seedlings are uniform in growing vigor, and the method is high in repeatability. The seed germination rate and the transplanting survival rate of baobab are increased greatly, a lot of baobab seedlings with uniform growing vigor can be provided within a short time, and the method is of great significance in baobab production.
Owner:SANYA NANFAN SCI TECH INST
Method for detecting moisture contents of explosion beads for cigarettes
InactiveCN109507325AAccurate analysisQuantitatively accurateComponent separationInternal standardPre treatment
The invention discloses a method for detecting moisture content of explosion beads for cigarettes. According to the method, explosion bead samples for cigarettes are pretreated, separated by a capillary column and analyzed by a gas chromatography-thermal conductivity detector method; each sample is measured twice in parallel; in each experiment, a blank sample is needed; and quantification is carried out by adoption of an internal standard method so as to obtain moisture contents in the beads. The detection method is verified to have an adding standard recovery rate of 98.95%-104.48%, a methodquantification limit of 0.0577 mg / mL, an intraday precision of 3.47% and a day-to-day precision of 4.05%. The method is simple in pre-treatment operation and good in reproducibility, and is capable of correctly analyzing and quantifying explosion bead samples with low moisture contents.
Owner:CHINA TOBACCO SHAANXI IND
Method for detecting content of N, N'-diacetyl-L-cystine in compound amino acid injection
PendingCN111579704AThe method is reproducibleGood reproducibilityComponent separationFluid phaseAmino Acid Injection
The invention relates to a method for detecting N, N'-diacetyl-L-cystine in a compound amino acid injection by applying high performance liquid chromatography. The method comprises the following steps: preparing a mobile phase, preparing a reference substance solution, preparing a test solution, setting chromatographic instrument parameters, detecting the reference substance solution, detecting the test solution, and calculating the content of N, N'-diacetyl-L-cystine in the test solution. According to the method, a phosphate mobile phase system is adopted, separation of N, N'-diacetyl-L-cystine and adjacent chromatographic peaks can be achieved on a common C18 chromatographic column, operation is easy and convenient, the method is easy to implement, and compared with an ion pair mobile phase system, the method is good in reproducibility, does not need expensive ion pair reagents and is more economical.
Owner:费森尤斯卡比华瑞制药有限公司
HPLC fingerprint detection method for balsam pear leaves
The invention discloses an HPLC fingerprint detection method for balsam pear leaves. The method comprises the steps of preparing a contrast product solution, preparing a reference product solution, establishing a contrast fingerprint spectrum, and preparing and detecting a test product solution. By virtue of screening of multiple processes, multiple components in the balsam pear leaves are effectively separated and detected, the obtained fingerprint spectrum has multiple peaks, the separation degree of the peaks is good, and the method is good in repeatability and high in precision, so that the quality of a balsam pear leaf medicinal material can be monitored easily, conveniently, quickly, comprehensively, accurately and reliably, and the effective guarantee is provided for comprehensively monitoring the quality of the balsam pear leaf medicinal material.
Owner:CHENGDU UNIV OF TRADITIONAL CHINESE MEDICINE
Method for separating and purifying antibacterial components in cumin essential oil
InactiveCN106135383AThe method is reproducibleAntibacterial and antisepticNatural extract food ingredientsMeat/fish preservation using chemicalsNatural productNatural food
The invention discloses a method for separating and purifying antibacterial components in cumin essential oil and belongs to the field of separation and extraction of natural products. The method includes the steps that firstly, petroleum ether is used as a solvent to carry out digestion on cumin, and the cumin essential oil is obtained; the cumin essential oil is sequentially separated into saturated hydrocarbon, aromatic hydrocarbon, nonhydrocarbon and colloid through column chromatography; the effective antibacterial components in the essential oil are obtained. Through verification, the extracted cumin essential oil components are remarkable in antibacterial and bacteriostatic effect, and extract from cumin plants can serve as a natural food preservative and is safe and reliable.
Owner:XINXIANG UNIV
Method for detecting quality of depression-relieving heart-comforting tablet
ActiveCN104950069AAccurate massQuality improvementComponent separationCurcuma aromaticaSalvianolic acid B
The invention discloses a method for detecting quality of a depression-relieving heart-comforting tablet and belongs to the field of care and traditional Chinese medicine detection. The method comprises the steps of respectively taking salvianolic acid B, saikoside a, saikoside d, acorus gramineus referenee crude herb extract, polygala tenuifolia referenee crude herb extract, curcuma aromatica referenee crude herb extract and berberine hydrochloride as reference substances, adopting the thin layer chromatography to identify whether the depression-relieving heart-comforting tablet contains salvia miltiorrhiza, Chinese thorowax root, acorus gramineus, polygala tenuifolia, curcuma aromatica and coptis chinensis; taking salvianolic acid B as a reference substance, and adopting the high-performance liquid chromatography to identify the content of salvianolic acid B in the depression-relieving heart-comforting tablet. The method is high in accuracy and can strictly control product quality, perform comprehensive and effective quality control on the depression-relieving heart-comforting tablet, monitor production process stability and guarantee quality uniformity, stability and reliability.
Owner:NANJING HAICHANG CHINESE MEDICINE GRPCO LTD
Pazopanib hydrochloride as well as preparation method and application thereof
InactiveCN107663193ASuitable for manufacturingSuitable for long term storageOrganic active ingredientsOrganic chemistry methodsMedicinal chemistryPilot scale
The invention belongs to the technical field of medicine, and specifically relates to a crystal form of pazopanib hydrochloride and a preparation method thereof. The new crystal form of pazopanib hydrochloride obtained in the present invention has the advantages of high purity, the largest impurity is less than 0.5‰, and stability Good performance; the method has good reproducibility, and the purity and crystal form can be well reproduced when it is scaled up to the pilot scale.
Owner:TIANJIN HANRUI PHARMA
Centella asiatica medicinal material and its extract product and method for detecting mass of preparation
ActiveCN108398493APromote absorptionSensitive and accurate detectionComponent separationPlant ingredientsMaterials preparationAsiaticoside B
The invention relates to a traditional Chinese medicinal material and a method for detecting mass of a traditional Chinese medicinal material preparation, and concretely relates to a centella asiaticamedicinal material and an extract product and the method for detecting the mass of the preparation. The method employs a high performance liquid chromatography for separating, through a QAMS technology, centella asiatica is taken as an internal standard substance, a relative correction factor of centella asiatica, madecassoside and asiaticoside-B is established, and the content of madecassoside and asiaticoside-B can be calculated. The method has the advantages of high detection sensitivity and good stability, can be objectively, comprehensively and accurately evaluate the mass of the centella asiatica medicinal material and its extract product and its preparation, can solve the problems of non objective and reasonable control of the medicinal material and the preparation mass due to lacking of a contrast product, and has important meaning for controlling mass and guaranteeing curative effect.
Owner:GUILIN SANJIN PHARMACEUTICALS CO LTD
Chinese buckeye seed decoction piece preparation method
The invention discloses a Chinese buckeye seed decoction piece preparation method. The preparation method includes: fumigating Chinese buckeye seeds by 10-40% lactic acid water solution, peeling the Chinese buckeye seeds and slicing the peeled Chinese buckeye seeds; subjecting the slices to microwave drying, ultraviolet sterilization and the like. A Chinese buckeye seed decoction piece prepared by the preparation method has the advantages that turnover rate of each of aescine A and aescine B is above 90%, and the aescine A and the aescine B are not affected by washing time, drying temperature and drying time. The preparation method is good in repeatability, and product quality is more controllable.
Owner:WUHAN AIMIN PHARMA
A quality detection method of pepper powder based on component analysis
InactiveCN104931605BThe method is reproducibleImprove accuracyComponent separationWater vaporMass chromatography
The invention discloses a method for detecting the quality of pepper powder based on component analysis. A certain amount of the pepper powder is distilled through water vapor to prepare a pepper extract solution, the obtained pepper extract solution is subjected to component analysis through a gas chromatographic mass spectrometry method, characteristic chemical components including linalool, linalyl acetate, beta-caryophyllene and alpha-caryophyllene in the pepper extract solution are selected as main target components, phenylethyl propionate is selected as an internal standard substance, and linalool, linalyl acetate, beta-caryophyllene and alpha-caryophyllene in the pepper extract solution are quantitatively analyzed with a selected ion gas chromatographic mass spectrometry method to determine the content and range of linalool, linalyl acetate, beta-caryophyllene and alpha-caryophyllene. The method for detecting the quality of the pepper powder based on the component analysis is capable of quickly, simply, flexibly and accurately detecting the quality of the pepper powder and can be widely applied.
Owner:ZENGCHENG HANDYWARE SEASONING
Method and device for measuring crushing degree of tobacco shreds
ActiveCN101694435BAccurately characterize resistance to crushingSmall amount of sampleStrength propertiesForce factorEngineering
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC +1
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