48results about How to "Analysis results are stable" patented technology

A multi-column liquid chromatography system (10) for performing a plurality of liquid chromatography separations in parallel is based on a column plate structure (12) having parallel grooves (20) formed in a surface (22) of a plate (18), a cover sheet (40) bonded to the surface (22) to cover the grooves (20) and a stationary phase (38) contained in each covered groove (20). Through holes (24, 26) in the plate (18) define respective inlets (24) for the chromatography columns (14) and flow cells (16) at outlets, with the cover sheet (40) providing an optically transparent end wall for the flow cells (16) and another cover sheet (42) bonded to the opposite surface (30) of the plate (18) providing the other optically transparent end wall for the flow cells (16). Thus merely three parts need be provided for a structure for providing the chromatography columns, that is, a plate having grooves and through holes plus two cover sheets. The chromatography system (10) additionally includes a pumping system (46) comprising a syringe pump (48) for each column (14), an optical system (28) for transmitting analytical radiation through the flow cells (16) and a fraction collection sheet (110) containing wells (112) which is fed past outlets (34-35) from the column plate structure (12).

In mass spectrometry which allows ionization of a sample without using any matrix, there are provided (i) a sample target which improves efficiency and stability of the ionization so as to be more practical and (ii) a production method thereof. The sample target includes, as a sample support surface, a surface which is used to support a sample in ionizing the sample on the basis of laser irradiation so as to perform mass spectrometry and which has a finely bumpy structure of an order ranging from nanometer to several dozen micrometer, wherein a face of the sample support surface is coated with metal. Further, the bumpy structure of the sample support surface is preferably arranged so that a plurality of concave portions are regularly formed so as to have an interval of not less than 1 nm and less than 30 μm. In the sample target, the concave portion has a trench shape, a lattice shape, or a cylindrical or prismatic shape. The sample target is produced in accordance with lithography.

The invention discloses a clenbuterol hydrochloride assay kit and its preparation method and use method. The clenbuterol hydrochloride assay kit comprises a kit body, a clenbuterol hydrochloride enzyme label plate, a clenbuterol hydrochloride standard solution, a clenbuterol hydrochloride enzyme conjugate, a diluent, a concentrated washing liquid, a first substrate and a second substrate. The preparation method provided by the invention comprises preparing the clenbuterol hydrochloride enzyme label plate, the clenbuterol hydrochloride standard solution, the clenbuterol hydrochloride enzyme conjugate, the diluent, the concentrated washing liquid, the first substrate and the second substrate. The use method provided by the invention comprises sample preparation, sample addition and detection, and detection result analysis. The clenbuterol hydrochloride assay kit has the advantages that sensitive, stable and reliable result analysis is realized; operation steps are less; sample pre-treatment is simple; adopted equipment can be popularized easily; and the clenbuterol hydrochloride assay kit can be utilized for determination of residual clenbuterol hydrochloride of pork, has sensitivity of 0.03 micrograms per kilogram, needs detection time shorter than detection time of an ELISA method by 30 minutes and satisfies requirements of rapid detection of clenbuterol hydrochloride residues.

{0><}0{>The invention relates to a method for measuring contents of gold and silver in a gold mud sample by virtue of fire assay and belongs to a method for measuring a gold mud material by virtue of a fire assay method. <0}{0><}0{>The method comprises the following steps of: burdening and fusing a test sample so as to obtain a proper amount of lead buttons and fragile molten slag; recycling residual gold and silver in the molten slag; separating gold and silver from the lead buttons through cupelling, thereby obtaining gold and silver combination particles; processing and weighing the particles; grinding the gold and silver combination particles into slices; separating gold by use of nitric acid; and weighing, and calculating contents of gold and silver. <0}{0><}0{>The method is capable of improving the experiment accuracy and simplifying experimental procedures, is convenient to operate, and is capable of realizing batch operation for samples and effectively improving the working efficiency.

Provided is an automatic analysis apparatus which can obtain stable analysis results by stabilizing a constant-temperature bath and the temperature of a reaction liquid inside reaction containers. For this purpose, the automatic analysis apparatus (1) comprises: a storage tank (10) for storing a temperature controlling liquid (L1) dispensed into reaction containers (5) using dispensing apparatuses (6) and (7); and a dispensation control section for performing a control for dispensing the temperature controlling liquid (L1) using the dispensing apparatuses into an empty reaction container when there is such an empty reaction container, in which neither a specimen nor a reagent is dispensed, on a reaction table (4), where the temperature controlling liquid is cooled down substantially equal to the dispensed reagent by laying a pipe, which is provided between a cooler and a reagent table (2) for passing the coolant, through the temperature controlling liquid in the storage tank.

A magnetic resonance imaging apparatus executes scans for executing a navigator sequence for acquiring as navigator data a magnetic resonance signal from a navigator area containing tissues body-moved in a subject and executing an imaging sequence for acquiring a magnetic resonance signal from an imaging area as imaging data at the subject, thereby to generate an image with respect to the imaging area. The magnetic resonance imaging apparatus includes, a phase profile generating part which generates a phase profile so as to show a relationship between a phase of the navigator data and a position of the navigator area, a phase correcting part which corrects folding back of the phase profile generated by the phase profile generating part, and a position detecting part which detects a position of a tissue body-moved in the navigator area, based on the phase profile corrected by the phase correcting part.

Provided is an automatic analysis apparatus which can obtain stable analysis results by stabilizing a constant-temperature bath and the temperature of a reaction liquid inside reaction containers. The automatic analysis apparatus (1) is equipped with a storage tank (10) for storing a liquid (L1) for controlling a temperature which is dividedly injected into the reaction containers (5) using devices (6) and (7) for divided injection, and a divided injection control section (15b) which is disposed between a cooling device and a reagent table (2) and cools piping, through which said cooling liquid is passed, to nearly the same degree as a reagent into which the liquid (L1) is dividedly injected, by passing the piping through the liquid (L1) stored in the storage tank (10) and, when there are vacant reaction containers (5) on a reaction table (4), into which no test substance nor reagent is injected, controls to dividedly inject the liquid (L1) into the vacant reaction containers (5) by using the devices (6) and (7) for divided injection.

The invention relates to a method for qualitatively and quantitatively analyzing free amino acids in a sample by utilizing reversed phase high performance liquid chromatography, which comprises the following steps of: first pre-treating the sample; then protecting the -SH of cysteine in the sample; next performing pre-column derivatization treatment on primary and secondary amino acids with derivatization agents orthophaladetyde (OPA) and fluorene methyl choroformate (FMOC) respectively; and finally performing reversed phase high performance liquid chromatographic (RP-HPLC) analysis. The method has the advantage of synchronously detecting 25 free amino acids in the sample solution, particularly performing -SH protection on the cysteine with a dithio-dipropionic acid (DTDPA) and then synchronously deriving the cysteine together with the other amino acids, along with detection diversity and high efficiency.

The invention relates to a method for analyzing amino acid by utilizing RP-HPLC (Reverse Phase High-Performance Liquid Chromatography), which comprises the following steps of: weighing 50ml of sample solution, centrifuging for 10 minutes at the speed of 4000r / min, weighing 25ml of supernatant, adding 25ml of trichloroacetic acid with the mass fraction of 2 percent, placing at the temperature of 4 DEG C for settling for 2 hours, then centrifuging for 10 minutes at the speed of 4000r / min, weighing 2ml of supernatant, and sieving through a 0.2 mu m microporous filter membrane; weighing 0.5ml of treatment fluid, adding 0.5ml of DTDPA (3,3'-Dithiodipropionic Acid) solution, uniformly mixing, and placing at the temperature of 80 DEG C for water-bath heating for 1 hour to obtain a protection fluid; and setting an automatic sampler for pre-column derivation: sucking 0.5mul of protection fluid , sucking 0.5mul of OPA (O-Phthaldialdehyde), mixing, sucking 0.5mul of FMOC (Fluorenl Methoxy Carbonyl) for adding and mixing, then sucking 32mul of water for adding and mixing, sampling, and carrying out gradient elution and detection.

The invention provides a general portable spectrum analysis system. The spectrum analysis system comprises a control display device, an excitation light source module, a spectrum probe, a spectrum analysis module, a camera and a chassis, wherein the control display device is used for controlling the excitation light source module, the spectrum probe, the camera, the spectrum analysis module and adatabase and analyzing and detecting a substance; the excitation light source module is used for outputting exciting light; the spectrum probe is used for emitting the exciting light and receiving a spectrum generated by the interaction of the exciting light and the analyzed substance; the spectrum analysis module is used for analyzing and detecting the spectrum generated by the interaction of theexciting light and the analyzed substance; the camera is used for shooting and recording images of the identified substance, analysis or experimental process, user, equipment and instruments; and thechassis is used for installing the hardware of all the systems, and the like. The general portable spectrum analysis system provided by the invention can be widely applied to various spectral analyses of substances and facilitates recording, filing, experiment analysis, and proofing.

The invention relates to an ivermectin detection kit, in particular to an ivermectin chemiluminescence enzyme-linked immunoassay rapid detection kit. The ivermectin chemiluminescence enzyme-linked immunoassay rapid detection kit comprises a kit body, an elisa plate arranged in the kit body and a reagent filled in the kit body, wherein each hole of the elisa plate is coated with coating antigens, the coating antigens are prepared by coupling metabolites of ivermectin with ovalbumin; the reagent comprises monoclonal antibodies of the ivermectin, elisa secondary antibodies, namely horseradish peroxidase-marked goat-anti-mouse antibodies, ivermectin series of standard solutions, concentrated phosphate buffer liquid, concentrated washing liquid and luminescent liquid. By using the kit, due to the adoption of the steps of adding a sample, washing, adding the elisa secondary antibodies, washing, adding the luminescent liquid, detecting, and judging results, the prepared kit has high sensitivity which can reach 0.01 to 5 ng / ml and has a wide linear dynamic range; an analysis method is simple, convenient and quick, the results are stable, and the error is small; the analysis results are sensitive, stable and reliable; the safety is high; the using period is long.

The invention discloses a synchronous detection method for organophosphate and metabolites in poultry egg products and application. The method comprises the following steps: 1) constructing a risk assessment mathematical model; 2) determining components to be detected and a sample to be detected; 3) pre-treating the sample; 4) sample detecting; 5) obtaining detection data by an internal standard method; and 6) performing health exposure risk assessment. The invention also discloses application of detection data obtained by the detection method to organophosphorus ester and metabolite crowd feeding health exposure risk assessment analysis, including daily exposure quantity analysis, pollution source analysis, exposure sensitive crowd analysis, marker safety limit value analysis, risk analysis and grading, to organophosphorus ester and metabolite crowd feeding health exposure risk assessment analysis. According to the method, a risk assessment mathematical model is constructed, 19 specific substances in OPEs and mOPEs are selected as components to be detected, and synchronous detection is performed by adopting the ultra-high performance liquid chromatography-tandem mass spectrometry, so that the contents of the 19 specific substances can be obtained at the same time, and detection data and risk analysis results can be rapidly and efficiently obtained.

The invention relates to a method for determining the amount of silver in gold-loaded carbon, which belongs to the method for determining the amount of silver in carbon chemical analysis methods. The sample is batched and melted to obtain lead buttons of appropriate quality (containing gold and silver) and friable slag, and the residual silver in the slag is recovered. The gold and silver composite particles are separated from the lead buttons by ash blowing, and the obtained gold and silver composite particles are weighed after treatment. The gold and silver grains are separated into gold by nitric acid. Silver content can be calculated after weighing. The invention can improve the accuracy of the experiment, simplifies the experiment procedure, is convenient to operate, can realize the batch operation of samples, and improves the work efficiency.

The invention discloses a method for measuring iodine content in iodine absorption circulating liquid. The method comprises the following steps: (1) accurately sampling and diluting the sample; (2) adding saturated bromine water; (3) adding a sodium formate solution and uniformly mixing; (4) boiling the mixed solution, and adding a sodium fluoride solution after the mixed solution is cooled; (5) adding a potassium iodide solution, titrating the solution to baby blue through a standard sodium thiosulfate solution, adding a starch solution, and continuing titrating the solution through the standard sodium thiosulfate solution until the blue just fades; and (6) calculating the iodine content in the iodine absorption circulating liquid through a formula. The method provided by the invention is suitable for measuring the iodine content in the iodine absorption circulating liquid when recycling iodine through a wet phosphoric acid method, and the method is good in repeatability and reproducibility and stable in analysis result, and the error of parallel measurement results is not larger than 0.10%, thereby having a great significance for production guide of chemical industry.

The invention discloses a method for detecting m-benzene dimethyl isophthalate-5-sodium sulfonate purity by liquid chromatography. The method incudes using FL2200 liquid chromatograph, an N2000 chromatographic workstation and chromatographic column Kromstar C18 in 4.6X150 mm and 5 micrometers, the volume ratio of mobile phase a and mobile phase b is 80-90 to 10-20, detection wavelength is 220 nm, flow velocity is 0.8 mL / min, sample injection volume is 20 microliters, and columnar temperature is at 30 degrees Centigrade. By the method, detection time is shorter than 10 minutes, analysis accuracy is up to 0.01 ng, reproducibility is good, relative error is 0.2%, operation is simple, analysis is fully automatic, and quality of m-benzene dimethyl isophthalate-5-sodium sulfonate is effectively controlled.

The invention discloses a gait-electrocardiogram (ECG) RR interval correlation method based on Gaussian regression. The invention comprises the following steps: step 1, synchronously acquiring three-dimensional coordinate data of motions of a subject and corresponding ECG signals by using a three-dimensional motion tracking system and an ECG acquisition device, respectively; step 2, carrying out gait quantitative analysis, nonlinear analysis and time-frequency analysis on the three-dimensional coordinate data, extracting 17 features to form a feature vector, and providing a fusion method; step 3, pre-processing the ECG signals to extract RR intervals; step 4, constructing a Gaussian process regression (GPR) correlation prediction model between the gait features and the ECG RR intervals; and 5, training and testing the GPR model, and performing correlation prediction analysis. The invention has advantages of strong self-adaptation, easiness in realization, super-parameter self-adaptive acquisition, etc., has better robustness and generalization performance, and can better reveal correlation information between the gait and the ECG.

The invention discloses a test sample treatment method for simultaneously measuring content of silicon and phosphor in a silicon-manganese alloy by ICP. The test sample treatment method comprises the following steps: weighing 0.1000g of a silicon-manganese alloy test sample with particle size of 160-200mesh, putting the silicon-manganese alloy test sample into filter paper which is pre-filled with 2.0-2.5g of a mixed solvent of anhydrous sodium carbonate and boric acid in a ratio of 2 to 1, uniformly mixing, packaging and putting into an iron crucible with a graphite layer bottom for fusing for 12-18 minutes at 800-900 DEG C, cooling for 2-3 minutes to obtain a sample, putting the sample into a container which is pre-filled with 90-110ml of a diluted hydrochloric acid solution consisting of hydrochloric acid and water in a ratio of 1 to 3, dissolving clinkers, filtering the obtained sample through rapid quantitative filter paper into a 250ml volumetric flask, cleaning the sample containing container and the filter paper with deionized water, and adding deionized water to the scale after cooling the filtrate and washing liquor. According to the test sample treatment method, the silicon-manganese alloy test sample is fused and decomposed through an alkaline fusion method, thereby avoiding volatilization loss of silicon when hydrofluoric acid is added to dissolve the test sample through an acid dissolving method; the test sample is completely decomposed without interference or dissipation, so that the analyzed results are accurate and stable; moreover, an ICP spectrograph is used for simultaneously measuring the content of silicon and phosphor in the silicon-manganese alloy.

A magnetic resonance imaging apparatus executes scans for executing a navigator sequence for acquiring as navigator data a magnetic resonance signal from a navigator area containing tissues body-moved in a subject and executing an imaging sequence for acquiring a magnetic resonance signal from an imaging area as imaging data at the subject, thereby to generate an image with respect to the imaging area. The magnetic resonance imaging apparatus includes, a phase profile generating part which generates a phase profile so as to show a relationship between a phase of the navigator data and a position of the navigator area, a phase correcting part which corrects folding back of the phase profile generated by the phase profile generating part, and a position detecting part which detects a position of a tissue body-moved in the navigator area, based on the phase profile corrected by the phase correcting part.

The invention provides a carrier pigeon genetic relationship analysis method and device and a storage medium. The method comprises the steps of acquiring a plurality of carrier pigeon iris image sample groups and corresponding labels, wherein the carrier pigeon iris image sample groups comprise a plurality of carrier pigeon iris images, and the labels are used for indicating genetic relationshipsbetween carrier pigeons corresponding to the carrier pigeon iris images respectively; training a preset twin neural network according to the carrier pigeon iris image sample groups and the corresponding labels to obtain a trained carrier pigeon iris neural network model; and carrying out genetic relationship analysis on a to-be-analyzed carrier pigeon iris image according to the carrier pigeon iris neural network model.

The invention discloses an X-ray fluorescence spectrophotometer. The X-ray fluorescence spectrophotometer comprises a measurement cavity and an analysis module; the measurement cavity is a structure capable of being opened and closed, so that a sample is taken and placed; when being closed, the measurement cavity is sealed and isolated with outside; a sample disc, filter plates and a displacementdevice are arranged in the measurement cavity; multiple installation stations used for installing different light filters are arranged on the filter plates; a driving device is used for driving the sample disc and one filter plate to move corresponding to the other, so that the sample disc is aligned to the light filters on the filter plates; the analysis module comprises an X-ray generator and adetector; X-ray generated by the X-ray generator irradiates a sample in the sample disc after passing through the light filters; the detector is used for receiving fluorescence X-ray generated by thesample after being stimulated, so that a fluorescence spectrogram is formed; when being used, the X-ray fluorescence spectrophotometer is simple, rapid and safe in sample preparation, and performs non-destructive analysis on the sample; the sample can be repetitively used; the equipment use investment is low; and daily calibration is unnecessary.

The invention discloses hexafluoro-Propoxyethylene analyzing and measuring method. It includes the following steps: processing gas-chromatography analysis for the hexafluoro-Propoxyethylene; using area normalization to directly measure its content; chromatographic analysis temperature is 40 degree centigrade; chromatographic column type is DB-17; liquid membrane is 1.0um; detector is flame ionization. The invention has reliable result, simple operation, can be used to guide hexafluoro-Propoxyethylene study and production.

The invention discloses methoxy-tetrafluoro-methyl propionate analyzing and measuring method. It includes the following steps: processing gas-chromatography analysis for the methoxy-tetrafluoro-methyl propionate; using area normalization to directly measure its content; chromatographic analysis temperature is 150 degree centigrade; chromatographic column type is DB-200; liquid membrane is 0.32um; detector is flame ionization. The invention has reliable result, simple operation, can be used to guide methoxy-tetrafluoro-methyl propionate study and production.

The invention discloses an analysis method of embedded electroplating leveling agent into an IC support plate through hole. The analysis method comprises the following steps: preparing a standard solution; preparing an electrolyte; making a standard curve; verifying a correction factor: placing the electrolyte below an electrode of the analyzer, placing the standard solution into an automatic sample inlet of the analyzer, obtaining the concentration of a leveling agent of the standard solution through the analyzer, and comparing the concentration with the concentration of the leveling agent ofthe standard solution; and carrying out sample analysis: placing the electrolyte below an electrode of the analyzer, arranging a sample at an automatic sample inlet of the analyzer, starting the analyzer for analysis, and recording a potential diagram. The potential difference is obvious, and the analysis result is stable.

An analysis device includes an electron emission element, a collector, an electric field former, a power source, and a controller. The electron emission element includes a bottom electrode, a surface electrode, and an intermediate layer arranged between the bottom electrode and the surface electrode. The power source and the controller allow application of a voltage between the bottom electrode and the surface electrode. The electric field former forms an electric field in an ion movement region where anions directly or indirectly generated by electrons emitted from the electron emission element move toward the collector. The collector and the controller allow measurement of a current waveform of an electric current made to flow by arrival of anions at the collector. The controller regulates, based on the current waveform, a voltage applied between the bottom electrode and the surface electrode.

The invention relates to an online music recommendation method and device. The online music recommendation method comprises recording a plurality of user operation assemblies in every unit time period of a user and enabling every two unit time periods to be not overlapped; setting a first score and an attenuation coefficient which are corresponding to every user operation performed on every song in every unit time period according to types or attributes of a plurality of operations in the plurality of recorded user operation assemblies; collecting first scores of user operations performed on every song in continuous n unit time periods, attenuating the first scores by time according to the corresponding attenuation coefficient and obtaining user standard operation scores of every song in the continuous n unit time periods according to the attenuated first scores; recommending songs to clients according to the user standard operation scores in the continuous n unit time periods. The online music recommendation method and device enables a user not to perform unnecessary operations and is good in timeliness and sensitiveness.

The invention relates to a method for qualitatively and quantitatively analyzing free amino acids in a sample by utilizing reversed phase high performance liquid chromatography, which comprises the following steps of: first pre-treating the sample; then protecting the -SH of cysteine in the sample; next performing pre-column derivatization treatment on primary and secondary amino acids with derivatization agents orthophaladetyde (OPA) and fluorene methyl choroformate (FMOC) respectively; and finally performing reversed phase high performance liquid chromatographic (RP-HPLC) analysis. The method has the advantage of synchronously detecting 25 free amino acids in the sample solution, particularly performing -SH protection on the cysteine with a dithio-dipropionic acid (DTDPA) and then synchronously deriving the cysteine together with the other amino acids, along with detection diversity and high efficiency.

The invention provides a gas phase nicotine calibrating apparatus and a method thereof. The apparatus comprises an air compressor, a steam-water separator, an up and a down air channel, a high temperature evaporating chamber, and a low temperature condensation chamber; a buckle shaped pipe is inserted between the evaporating chamber and the condensation chamber, the upper air channel is communicated with a straight pipe of the buckle shaped pipe which is inserted in the evaporating chamber, and the down air channel enters the evaporating chamber through a normal bend and a pipe orifice is located below the liquid level. Calibration of concentration of nicotine in the solution after the solvent is evaporated at different temperatures can be realized, that is by means of a temperature difference between the evaporating chamber and the condensation chamber, high temperature gas phase nicotine molecules and high temperature propylene glycol molecules are condensed into liquid phase in the condensation chamber, a citric acid-ethanol solution in the condensation chamber is used for absorbing nicotine and propylene glycol, and excellent dissolvability of CH2Cl2 for nicotine is used for extracting nicotine; finally, quinoline is used as an internal standard substance in order to carry out gas chromatograph, and evaporation concentrations of nicotine in a nicotine-propylene glycol system under the condition with different temperatures can be calculated.

The invention discloses a method for improving the reliability of an extra-high voltage direct current access power system with wind power uncertainty. The method comprises the following steps: simulating cumulative probability distribution of wind speed by using a Weibull distribution model; processing the cumulative probability distribution of the wind speed to obtain simulated wind speed, and obtaining wind power generation output; obtaining an alternating current-direct current coupling equation containing a current converter; determining a node power balance model of a node where the converter is located; establishing an optimal scheduling model by using an AC / DC coupling equation containing the converter and a node power balance model of the node where the converter is located; enabling the optimal scheduling model to carry out model solving according to wind power generation output, the number of available converters and the available condition of a generator set to obtain the load reduction amount, calculating the power supply insufficiency according to the load reduction amount, and improving the reliability of the power system according to the power supply insufficiency. According to the method, reliability analysis is effectively carried out on the extra-high voltage direct current and wind power integrated power system, and effective measures are taken to ensure reliable operation of the power system.

The invention relates to the technical field of steelmaking and in particular relates to a method for analyzing nitrogen components of a furnace front low-nitrogen steel sample. The method comprises the following steps: preparing a cylindrical sample, and cutting and milling the sample; measuring the sample by employing a direct-reading spectrograph, wherein the argon pressure is set to be 0.27-0.29Mpa, the argon purging time is set to be 2-4 seconds, the pre-burning time is set to be 3-5 seconds, and the integral time is set to be 5-10 seconds; drawing an analytical curve by employing a one-step regression mode by utilizing a series of standard samples, wherein the curve slope is set to be 0.97-1.03, the curve intercept is set to be -0.003-+0.003, the interference element is silicon, and the interference removal coefficient is 0.005-0.010; and exciting the sample twice, recording results from the third analysis point to the fifth analysis point, and calculating the average value to serve as the final detection result. The provided method for analyzing nitrogen components of the furnace front low-nitrogen steel sample is high in analysis precision and high in analysis speed, the iron and steel smelting period is shortened, and the production efficiency is improved.