61results about How to "Accurate detection of content" patented technology

The invention relates to an online recognition and inhibition method based on a non-target interference smell in an electronic nose of an artificial intelligent learning machine. The recognition method comprises the following steps of collection of target gas and typical non-target interference smell data samples, pretreatment of a sensor array signal, characteristic extraction of the target gas and the non-target interference gas sample, training learning of the artificial intelligent learning machine and real-time online recognition of the intelligent learning machine on the non-target interference smell. An inhibition method of the non-target interference smell comprises the following steps besides the steps of the recognition method of: storage and updating of array signal dynamic matrix, interference inhibition and weighted correction of dynamic storage matrix, and prediction of concentration of target gas. The invention also provides the other inhibition method of the non-target interference smell comprising the following steps besides the steps of the recognition method of prediction of the concentration of target gas, the storage and updating of target gas prediction concentration dynamic matrix and the weighted correction and interference inhibition of the dynamic storage matrix. The method has beneficial effects that the target gas and the non-target interference gas can be recognized by utilizing an artificial intelligent mode, and a type mark of the detection signal is given; and the interference caused by the non-target interference smell can be inhibited, and the content of the target gas can be accurately detected.

The invention discloses a method for testing the content of magnetic substances in a lithium ion battery anode material. The method comprises the following steps: ultrasonically dispersing a lithium ion battery anode material to be tested into a solvent, adding a polymer cladded magnet, ultrasonically adsorbing the magnetic substances, thereby obtaining the polymer cladded magnet adsorbed with the magnetic substances; adding the polymer cladded magnet adsorbed with the magnetic substances into a cleaning solution for performing ultrasonic cleaning; dissolving the cleaned polymer cladded magnet adsorbed with the magnetic substances by using an acidic reagent, thereby obtaining a dissolution solution; and testing the content of the magnetic substances in the dissolution solution. According to the method, the content of the magnetic substances in the lithium ion battery anode material can be accurately tested, particularly the content of the magnetic substances contained in micron order materials and nanoscale materials can be accurately detected. The testing method is simple, easy to operate and high in precision, and the precision can reach a ppb level.

The invention provides a method for detecting magnetic substance content of a lithium ion battery positive electrode material. The method comprises placing a positive electrode material and a polymer-coated magnet in a dispersion liquid, carrying out ultrasonic dispersion at frequency of 20 to 100kHz for 30 minutes, carrying out stirring at a rotation rate of 60r / min for 30min so that the polymer-coated magnet adsorbs the magnetic substance in the positive electrode material, tanking the polymer-coated magnet adsorbed with the magnetic substance out of the dispersion liquid, carrying out ultrasonic cleaning, putting the cleaned polymer-coated magnet adsorbed with the magnetic substance into hydrochloric acid having a mass concentration of 18% so that the magnetic substance is dissolved to form a solution, taking the polymer-coated magnet out of the solution, and detecting the content of the magnetic substance in the solution. The method can accurately detect magnetic substance content of a lithium ion battery positive electrode material.

The invention relates to a rapid identification method for the quality of lead paste of a lead-acid storage battery. The rapid identification method comprises the following steps: step 1, detecting impurity elements and the content of lead in the lead paste by using an energy dispersive X-ray (EDX) analysis method; and step 2, detecting the content of the impurity elements in the step 1 by adopting an inductively coupled plasma (ICP) atomic emission spectrometry. The lead paste identification method provided by the invention can be used for sampling the lead paste and carrying out EDX detection to obtain the impurity elements and the lead content in the lead paste of the lead-acid storage battery; an ICP detection method is used for tracing quantitative known elements; the EDX method and the ICP method are combined to perform qualitative and quantitative analysis on the impurity elements in the lead paste, and the quality of the lead paste can be rapidly and accurately identified.

The invention discloses a method for detecting free and bound trace cyanide and belongs to the technical field of analysis and detection. The method is mainly used for beverage wine and its raw material analysis. The method utilizes a specific pretreatment and derivatization device to respectively treat the free or bound cyanide samples. Aiming at a free cyanide, the hydrocyanic acid is released and the cyanide group is directly derived. Aiming at the bound cyanide, the bound cyanide is converted into free hydrocyanic acid and the free hydrocyanic acid is derived through a derivatization reagent. The derivative is subjected to qualitative and quantitative analysis based on the liquid chromatography-mass spectrometry combined technology. A standard curve is built by an internal standard method. The contents of the free and bound cyanides are respectively calculated. The detection method has a detection limit of 0.01 micrograms per liter, a quantification limit of 0.05 micrograms per liter, a linear correlation coefficient of more than 0.99, an adding standard recovery rate of 93.8% to 106% and relative standard deviation of less than 10%. The method has the advantages of high detection sensitivity, short time and small interference, and can meet the requirements on free and bound cyanide determination.

The present invention provides a method for testing the general foam protein in the beer barley and the malt. The present invention adopts an optimized albumen extracting method, uses the popular and common Coomassie brilliant blue ration rationed albumen method (Bradford method) to test the change of the general foam protein in the beer barley and malt. The method is simple and quick, and has strong applicability.

The invention discloses a method for detecting chlorine dioxide content in life drinking water, which includes: measuring ClO2 homologous to four fifth of the total amount residual and the total by a first titration; and then measuring all the ClO2[-] in the water sample by a second titration. The method adopts chemical analysis to detect chlorine dioxide content in water, can effectively exclude other ion interference, avoids affection of accessory substances ClO2[-], ClO3[-] and the like ions, thereby accurately detecting the content of chlorine dioxide in the life drinking water; the minimum detection amount of ClO2[-] can achieve 0.02mg, the minimum detectable amount of ClO2 can achieve 0.08mg / L; moreover, the method has simple operation, and suitable promotion.

The invention discloses a detection method of an L-2-amino-5-guanidinovaleric acid enantiomer and belongs to the technical field of food and drug analysis. The method mainly comprises the following steps: preparing a system applicable solution; preparing an enantiomer reference solution; preparing a test solution; preparing a derivatizing reagent; performing pre-column derivatization and chromatographic condition and system suitability tests; determining the L-2-amino-5-guanidinovaleric acid enantiomer. The detection method has higher sensitivity, accuracy, precision and durability, can accurately reflect content of the L-2-amino-5-guanidinovaleric acid enantiomer and is applicable to detection and quality control of the L-2-amino-5-guanidinovaleric acid enantiomer in industry, so that reference is provided for setting reasonable quality standards, product quality can be controlled and mastered better, and edible and medicinal safety is guaranteed.

The invention relates to a method for analyzing related substances of Roxadustat. The method is carried out on a high performance liquid chromatograph. The method comprises the following steps: adopting an Ultra XB chromatographic column; taking a trifluoroacetic acid aqueous solution and an organic solvent as mobile phases; enabling the liquid phase diode array detector or the ultraviolet detector to carry out gradient elution detection so as to effectively separate and detect the Roxadustat-related substances. According to the invention, the related substances in the Roxadustat can be comprehensively controlled, the drug safety can be improved, and the basis can be provided for the establishment of the quality standard of the Roxadustat bulk drug.

The invention provides a rabies virus nucleoprotein monoclonal antibody and application thereof. The amino acid sequence of a light chain variable region of the monoclonal antibody is shown as SEQ ID NO.1, and the amino acid sequence of a heavy chain variable region of the monoclonal antibody is shown as SEQ ID NO.2; or the amino acid sequence of the light chain variable region of the monoclonal antibody is shown as SEQ ID NO.3, and the amino acid sequence of the heavy chain variable region of the monoclonal antibody is shown as SEQ ID NO.4. The monoclonal antibody has no cross reaction with other kinds of protein of rabies viruses, other antigens and pathogens, has the advantages of high specificity and high sensitivity, can accurately detect the content of each effective component in a rabies combined vaccine in a sample and has good application prospects.

The invention belongs to the technical field of flavor and fragrance detection and relates to a method for extracting vitamin B in flavors and fragrances. The method for extracting the vitamin B in the flavors and fragrances comprises the steps: (1) mixing a flavor and fragrance sample with hydrochloric acid to obtain a mixture; and (2) carrying out solid-liquid separation on the mixture to obtain an extracting solution. The invention further relates to a method for detecting the vitamin B in the flavors and fragrances and a kit for extracting and / or detecting the vitamin B in the flavors and fragrances and a purpose thereof. The method for extracting the vitamin B in the flavors and fragrances, provided by the invention, can effectively and simultaneously extract vitamin B3, vitamin B5, vitamin B7 and vitamin B9 in the flavors and fragrances; and the method for detecting the vitamin B in the flavors and fragrances, provided by the invention, can accurately and simultaneously detect the contents of the four vitamins B in the flavors and fragrances.

The invention provides a pertussis PRN protein monoclonal antibody and an application thereof, which belong to the biological product field. The monoclonal antibody is prepared by taking PRN protein in bordetella pertussis as immunogen immune mice, the obtained two monoclonal antibodies are respectively as, an amino acid sequence of a light-chain variable region is shown in a SEQ ID No.1, the amino acid sequence of a heavy-chain variable region is shown in a SEQ ID No.2, the amino acid sequence of the light-chain variable region is shown in a SEQ ID No. 3, and the amino acid sequence of the heavy-chain variable region is shown in a SEQ ID No.4. The provided monoclonal antibody enables no cross reaction with bordetella pertussis other protein and other antigen and pathogen, has the advantages of high specificity and high sensitivity for detecting the pertussis PRN components, can accurately detect PRN content of pertussis vaccine in a sample, and can be widely used in vaccine and clinical detection.

The invention discloses an inflating and deflating device. The inflating and deflating device comprises a multi-neck flask (A), a reflux condensing tube (B) and an absorption bottle (C) and is characterized in that a narrow neck (1) of the multi-neck flask (A) is connected with the reflux condensing tube (B), a branch tube (1) of the reflux condensing tube (B) is connected with the absorption bottle (C), a branch mouth (2) of the reflux condensing tube (B) is connected with a ground mouth (3) with branch tubes at the two ends, and one end of the ground mouth (3) is connected with an inflating device (D). The inflating and deflating device is simple and low in firing cost, and operation is convenient when carbon dioxide in food is detected.

The invention relates to the technical field of aqueous humor antigen detection, in particular to a kit and application of the kit in detecting vascular endothelial growth factors in anterior chamberfluid; and the kit contains the following components which are independently stored: an enzyme reactant, a magnetic separation reagent, a stability enhancer, a calibrator, a cleaning concentrated solution and a substrate solution. The kit provided by the invention can accurately detect the content of the vascular endothelial growth factor in the anterior chamber fluid, has the advantages of smallsample demand, short detection time and wide linear range, and can obviously lower the background value when mutant alkaline phosphatase is used as a magnetic particle sealing agent, thereby loweringthe lowest detection limit of the reagent. The important application value is realized on the diagnosis of VEGF related ophthalmic diseases.

The invention belongs to the technical field of quality control, and particularly relates to a method for determining the content of garlicin diallyl trisulfide in garlicin tablets. The method comprises the steps as follows: a to-be-detected sample of the garlicin tablets is mixed and dissolved with N, N-dimethylformamide, detection with high performance liquid chromatography and analysis with an external standard method are performed, and the content of diallyl trisulfide is obtained. With the adoption of the detection method, diallyl trisulfide can be fully separated from the garlicin tablets, and accordingly, the content of diallyl trisulfide in the garlicin tablets can be accurately detected. The detection method has the advantages of good linearity, repeatability and stability, high precision, low detection limit and quantification limit and high recovery rate, and blanks basically have no interference to determined results.

The invention provides a method for rapidly measuring the content of chromium in copper or copper alloy. The method comprises the steps of 1 preparing a solution to be measured: weighing a sample of copper or copper alloy, putting the sample into a beaker, adding hydrochloric acid, and uniformly mixing; adding nitric acid, heating and dissolving until the solution is nearly dry, slightly cooling, supplementing the mixed acid, cooling to room temperature, and fixing the volume to obtain a solution to be detected; 2 preparing a series of standard solutions according to sample components, and preparing a standard working curve; and 3 detecting the solution to be measured through an inductively coupled plasma emission spectrometer to obtain the chromium content in the solution to be measured. According to the measuring method provided by the invention, a rapid quantitative analysis method for the chromium content in the copper and the copper alloy by adopting the inductively coupled plasma emission spectrometry is established, and the measuring method is short in test period, relatively high in sensitivity, relatively wide in dynamic linear range, relatively low in detection limit and relatively accurate in detection result; and detection and control of the chromium content in the research, development and production processes of the copper and the copper alloy can be met.

A technology for detecting a metal impurity in a puerarin active ingredient comprises the following steps: step I: grinding radix puerariae, sieving with a 50-100-mesh sieve to form an undersize product, immersing the undersize product in a hydrochloric acid solution for treatment, step II: regulating a pH (potential of hydrogen) value of a system in step I to be neutral, performing filtration toform filter residue, step III: treating the filter residue obtained in step II with hydrogen peroxide, then performing washing and filtration to take the filter residue, drying the filter residue to form dried filter residue, step IV: adding an EDTA (ethylene diamine tetraacetic acid) solution and a sodium hydroxide solution into the dried filter residue, and stirring for reaction for 1-3h at 25-35 DEG C, and step V: taking a supernate obtained in step IV, and detecting the content of metal ions by adopting high efficiency liquid chromatography. After treatment by the pretreatment technology,the content of the metal ions in the radix puerariae can be detected accurately.

The invention discloses a method for determining antioxidant BHT in an insulin glargine injection and belongs to the field of drug packaging and drug compatibility. The method specifically adopts a HPLC (high performance liquid chromatography) method for detection, a mobile phase comprise acetonitrile, water and a phosphate buffer, a complex preprocessing means is avoided, a chromatographic peak of the antioxidant BHT is separated successfully from chromatographic peaks of insulin glargine and m-cresol according to the method, a trailing phenomenon is avoided, and the content of the antioxidant BHT in a sample is detected accurately.

The invention discloses a chromatographic method for rapidly measuring the content of vitamin D2 in a vitamin D2 injection. The effect that the content of vitamin D2 in a complex component sample is measured rapidly and accurately is finally achieved through skillful optimization for a chromatographic condition by using an ultra performance convergence chromatography. The chromatographic method comprises the following steps of (1) preparing a system suitability solution; (2) preparing a reference solution; and (3) preparing a test solution. The content of vitamin D2 in the vitamin D2 injectionis calculated by using a standard curve of vitamin D2. According to the chromatographic method for rapidly measuring the content of vitamin D2 in the vitamin D2 injection disclosed by the invention,the vitamin D2 can be rapidly separated within 15 min and the content of vitamin D2 can be accurately measured; and the method has the advantages of good specificity and linear relation, high accuracydegree, fast detection speed, high sensitivity, good reproducibility and environmental protection.

The invention belongs to the field of medicine detection, discloses a detection method for borneol contents in a concentrated pill for promoting coronary circulation, and performs an important guidance meaning for the quality control of the concentrated pill for promoting coronary circulation. The detection method for borneol contents in the concentrated pill for promoting the coronary circulationcomprises the following specific steps that: 1: taking a proper quantity of isoborneol reference substances and camphol reference substances, carrying out precise weighing, and adding absolute ethylalcohol to prepare reference substance solution; 2: taking a sample for testing, carrying out porphyrization and precise weighing, adding absolute ethyl alcohol, weighing weight, carrying out ultrasonic treatment, weighing weight again, supplementing lost weight by the absolute ethyl alcohol, evenly shaking, filtering, taking subsequent filtrate, and obtaining the solution of the sample for testing; and 3: precisely adsorbing 1[mu]l of reference substance solution and 1[mu]l of solution of the sample for testing, injecting into a gas chromatograph, and carrying out measurement. 1g of concentrated pill for promoting coronary circulation contains at least 13.5mg of borneol by metering by the total amount of isoborneol (C10H18O) and camphol (C10H8O).

The invention relates to the technical field of drug analysis and detection, and specifically discloses a detection method for p-hydroxyacetophenone related substances. The invention adopts gas chromatography to measure related substances, and the chromatographic conditions are as follows: chromatographic column: a capillary column with phenyl-dimethylpolysiloxane as a fixed liquid; carrier gas flow rate: 0.5-1.5ml / min; : 8~12:1; Heating program: Initial temperature: 45~55°C, increase to 215~225°C at a rate of 8~12°C per minute, and maintain for 5~10 minutes; Inlet temperature: 240~260°C; The detector is a hydrogen flame ionization detector, and the temperature of the detector is 240-260 °C. The detection method provided by the invention can realize the effective separation of p-hydroxyacetophenone, 2'-hydroxyacetophenone, 3'-hydroxyacetophenone, phenol and phenol acetate, and accurately detect the related substances in p-hydroxyacetophenone content. In addition, the method of the invention is sensitive, accurate and reproducible, provides a reliable guarantee for improving and better controlling the quality of p-hydroxyacetophenone, and also has great significance for improving drug safety.

The embodiment of the invention relates to a method for simulating early degradation of organic matter in microbialite. According to the invention, blue-green algae in microbialite is cultured in thelaboratory as organic matter in the experiment, bacteria involved in various stages of organic matter degradation in the microbial mat are cultured, and the bacteria are added into an interlayered device of blue-green algae and carbonate minerals under aerobic and anaerobic conditions respectively for a reaction, so as to realize the simulation of the early degradation process of organic matter. The degradation products can be well stored in a reaction device, and after the degradation is completed, samples are taken from a sampling port for liquid chromatography and infrared spectrum analysis, thus completing the accurate detection of the products in each stage of organic matter degradation.

The invention discloses a method for simultaneously determining multiple wooden plug pollutants in grape wine, and belongs to the technical field of grape wine detection. The method mainly comprises the following steps: derivatization treatment of a target object and an internal standard, determination of characteristic ions of the target object and the internal standard, establishment of a gas chromatography-tandem mass spectrometry selective reaction monitoring method, determination of a standard curve and detection of the cork pollutants in the grape wine. The method can be used for simultaneously determining nine wooden plug pollutants such as 2, 4, 6-trichloroanisole, 2, 3, 4, 5-tetrachloroanisole, 2, 3, 4, 6-tetrachloroanisole, pentachloroanisole, 2, 4, 6-trichlorophenol, 2, 3, 4, 6-tetrachlorophenol, pentachlorophenol, 2, 4, 6-tribromoanisole and 2, 4, 6-tribromophenol. The detection method is good in linear correlation and standard recovery rate, the detection limit is 0.1 ng / L-0. 5 ng / L, and a technical guarantee can be provided for detection of the cork pollutants in the wine.

The invention belongs to the field of analytic chemistry, relates to the detection of pesticide residue and particularly relates to a detection method of sulfur dioxide in a steamed bun. The detection method of the sulfur dioxide in the steamed bun comprises the following steps of crushing, acid immersing, distilling, titrating and detecting. By virtue of the crushing and acid immersing process, the content of sulfur dioxide in the steamed bun can be accurately detected; and the method is high in efficiency and low in cost.

The invention discloses a detection method of a novel nitrogen-containing disinfection by-product N-chloro-2,2-dichloroacetamide (N-Cl-DCAM) in drinking water, which adopts ultra-high performance liquid chromatography / triple quadrupole The mass spectrometer is used for analysis, and the content of N-Cl-DCAM in the sample is determined according to the analysis chromatogram of the sample and the standard working curve of N-Cl-DCAM. N-Cl-DCAM is a newly discovered nitrogen-containing disinfection by-product, and the method of the present invention is more used for the quantitative detection of known substances, and the accuracy is higher; in addition, there is no need to enrich the N in water by solid-phase extraction. ‑Cl‑DCAM, no need to use reagents such as salt, extractant, etc., avoiding direct contact of experimenters with toxic and harmful organic solvents, and at the same time, saving sample testing time and reducing sample cost; using ultra-high performance liquid chromatography / triple quadrupole Mass spectrometry, and determined detailed instrument parameter conditions, can avoid N-Cl-DCAM peak tailing and other phenomena, ensure its normal peak, and can obtain higher detection limit (MDL) and smaller relative standard deviation (RSD).

The invention relates to the technical field of drug analysis and detection, and particularly discloses a method for detecting related substances of 4-Boc-aminopiperidine. According to the method, the related substances are determined by adopting a gas chromatographic method. The chromatographic conditions are as follows: a chromatographic column is a capillary column taking dimethyl polysiloxane as a stationary liquid; the flow velocity of a carrier gas is 2.0-4.0 ml / min; the split ratio is (5-10): 1; in a heating procedure, the initial temperature is 45-55 DEG C and maintained for 3-5 minutes, and the temperature is increased to 180-220 DEG C at the speed of 10-15 DEG C per minute and maintained for 3-5 minutes; the temperature of a sample inlet is 160-200 DEG C; and a detector is a hydrogen flame ionization detector, and the temperature of the detector is 240-260 DEG C. According to the detection method provided by the invention, effective separation of the 4-Boc-aminopiperidine and the related substances of the 4-Boc-aminopiperidine can be realized, and the content of the related substances in the 4-Boc-aminopiperidine can be accurately detected. The method is sensitive, accurate and good in reproducibility, provides reliable guarantee for improving and better controlling the quality of 4-Boc-aminopiperidine, and also has very important significance for improving medication safety.

The invention discloses a method for rapidly measuring the content of oxazoline in crops, comprising the following steps of: Step a: preparing a solution; Step b: pretreating the crop sample; Step c:measuring the sample; Step d: analyzing and calculating. The method for rapidly detecting the content of oxazoline in crops provides a reference basis for the pretreatment of the sample by rapidly designing the pretreatment of the sample in the crop by the design of the pretreatment method of the crop, and detects the content of the oxazoline in the crops accurately through the design of the rapiddetection method.