426 results about "Ionic chromatography" patented technology

The invention aims to provide a method and a device for determining the peak area of chloride ions based on ion chromatography. The method for determining the peak area of chloride ions based on ion chromatography comprises the following steps: step 1, identifying a chromatographic peak: peak separation, peak qualitation, baseline correction, peak trailing treatment and peak overlapping treatment; and step 2, calculating the chromatographic peak area: peak definition, integration algorithm, calibration curve application, repeatability verification, impurity peak deduction and main peak area calculation. According to the method, a chromatographic peak identification and chromatographic peak area calculation mode is designed, so that the technical problem that other impurity ions may be introduced to influence chloride ion chromatographic peak identification and accurate area calculation in an existing mode of determining organic chlorine through ion chromatography is solved.

The invention provides a method for detecting the concentration of phosphite ions in a natural water medium, which comprises the following steps: detecting a to-be-detected sample solution containing phosphite ions and impurity ions by using an ion chromatograph to obtain a chromatogram of the to-be-detected sample; determining a peak area value of phosphite ions from the chromatogram of the sample to be detected; obtaining the concentration of the phosphite ions in the sample to be detected according to a linear regression equation of the peak area value of the phosphite ions and the concentration of the phosphite ions; wherein the test conditions of the ion chromatograph are as follows: an anion exchange column is selected as a chromatographic column, and the column temperature is 43-56 DEG C; the leacheate is a potassium hydroxide solution, the flow rate is 1.0-2.0 mL / min, gradient leaching is adopted, and the concentration of the leacheate is 15-18 mM within the time period of 0-14 min; the concentration of the leacheate is 33-36 mM within the time period of 16-30 min; the concentration of the leacheate is 17 to 20 mM within the time period of 32 to 36 minutes.

The invention discloses an ion chromatography wave crest boundary extraction method based on fitting residual and tangent judgment, and belongs to the technical field of ion chromatography analysis. Comprising the following steps: S1, reading an original waveform data sequence, and executing frequency reduction sampling according to a set step length; s2, calculating the slope of the data after underclocking sampling by using a difference method, and searching positive and negative slope sections by performing first-order derivation on the waveform after underclocking sampling; s3, noise interference is eliminated, slope areas are grouped, then a chromatographic peak detection limit value is set, and an effective peak left section and an effective peak right section are screened out; s4, combining the effective wave crest left side section and the effective wave crest right side section to obtain an effective wave crest and a preliminary left boundary point and a preliminary right boundary point of the effective wave crest; s5, fitting a straight line through the preliminary left boundary point and the preliminary right boundary point to position an error integral region; and S6, updating the optimal boundary point by traversing the evaluation indexes of all points in the error integral region. The boundary search range is more accurate, and the calculation efficiency is higher.

The utility model relates to the technical field of ion chromatographs, in particular to a column oven of an ion chromatograph. A column oven of an ion chromatograph comprises a column oven structure and a column oven isothermal body arranged in the column oven structure, a chromatographic column and a temperature control assembly are arranged on the column oven isothermal body, a heat insulation structure matched with the column oven isothermal body is arranged in the column oven structure, and a valve assembly matched with the chromatographic column to form a passage is further arranged in the column oven structure. According to the utility model, by controlling and monitoring the temperature in the column box structure, the temperature can be accurately controlled and maintained in a proper range, so that the temperatures of the chromatographic column, the environment, the liquid and the like are consistent, and the reliability and the accuracy of an analysis test are ensured.

The invention relates to a carbon capture absorbent degradation performance evaluation method and a determination device, the method comprises the following steps: accelerating aging degradation of a to-be-detected sample under high pressure oxygen and heating conditions, simulating the oxidation process of an absorbent in long-term operation, and shortening the experimental period; in the test process, the pressure and temperature of the reaction kettle are automatically collected, a pressure-time curve is established, and the degradation resistance of the sample is comprehensively judged according to the pressure drop rate and inflection point time. The method for evaluating the degradation performance of the carbon capture absorbent can be used for rapidly and comprehensively evaluating the sample, and meanwhile, the degradation degree can be analyzed and judged without the help of high-end equipment such as cation chromatography and gas chromatography, so that the method is convenient and efficient; the method is particularly suitable for testing and optimizing the oxidation resistance of novel absorbents such as composite absorbents and phase change absorbents.

The invention relates to the technical field of exploration and development of unconventional oil and gas reservoirs, in particular to an experimental device and method for quantitatively evaluating CO2-hydrocarbon-water interaction mixing and dissolving capacity of a water-containing gas reservoir. The experimental device comprises a vacuum pump, a constant-temperature air bath box, a sample preparation unit, an injection unit, a testing unit and a metering unit. The method comprises the following steps: injecting excessive pure CH4 into a sample preparation unit at a constant pressure, enabling a two-phase system of the pure CH4 and formation water to reach hydrocarbon-water phase balance, transferring the formation water of saturated hydrocarbon into a visual phase tester, injecting CO2 into the visual phase tester at a constant pressure, fully stirring fluid, standing for a period of time, carrying out ion chromatography analysis, and determining the content of CO2 in the formation water. According to the experimental device, the proportion of CO2 and the proportion of CH4 in undissolved gas are determined, an experiment is carried out through the experimental device, a CO2-hydrocarbon-water interaction miscibility theory system in the whole CO2 injection and burying process of the gas reservoir with water can be perfected, and the problem that the miscibility of CO2-CH4 in the CO2-hydrocarbon-water system under the high-temperature and high-pressure conditions is difficult to effectively and quantitatively evaluate is effectively solved.

The utility model relates to the technical field of static electricity removing equipment, in particular to a waste liquid treatment device with a static electricity removing function, which comprises a liquid guide box, a static electricity removing box and a pipe clamp. The device is simple and compact in structural design, static electricity in waste liquid generated by the suppressor can be removed, meanwhile, the safety risk of explosion caused by hydrogen, oxygen and accumulated static electricity in gas is avoided, and the device has excellent practical performance in the technical field of ion chromatography detection. And a magnet is arranged on the outer side wall of the liquid guide box, so that assembly and installation are convenient, and the applicability is better. The pipe clamp and the static electricity eliminating box which are made of metal materials are used in cooperation with the grounding wire, so that charges in waste liquid can be eliminated, and static electricity possibly carried on a waste liquid pipe or a gas pipe can also be eliminated; and the liquid guide box made of an insulating material surrounds the outer sides of the static electricity eliminating box and the pipe clamp, so that a blocking effect is achieved, static electricity is prevented from being introduced into the pipe clamp again, and the static electricity eliminating effect is better.

The invention discloses a method for determining the content of monosaccharide in seaweed, and belongs to the technical field of biological detection. According to the method, an ion chromatography sugar separation system is adopted, a pulse ampere detector is combined, CarboPac PA20 is used as a sugar analysis column, and the eight monosaccharide components in the seaweed can be detected under the limited extraction and purification method. The method is low in detection limit, good in stability and suitable for measuring the content of free monosaccharide and polysaccharide hydrolyzed monosaccharide in common algae (such as brown algae, green algae and red algae).

The invention relates to the technical field of ion chromatography detection, in particular to a high-pressure cam pump stable in conveying flow, which at least comprises a first pumping assembly, and the first pumping assembly comprises a pump head, a pump body, a plunger rod, a liquid inlet, a liquid outlet and a sealing assembly. A liquid inlet and outlet structure is improved, and a liquid outlet is formed in the tail end of a pump cavity, namely, the liquid outlet is formed in the contact position of the pump cavity and a sealing assembly, so that liquid is pumped out in a first-in first-out mode, namely, the sucked liquid is pumped out first, dissolved gas or air bubbles and the like in the liquid conveying process are removed in time, and the liquid conveying efficiency is improved. Meanwhile, the liquid outlet is formed in the position of the sealing assembly, bubbles accumulated for a long time at the position of the sealing assembly can be taken out in time when the liquid is pumped out, and after operation is carried out for a period of time, the conveying flow is stable and the precision is high; and compared with the situation of poor conveying flow precision, the improvement effect is remarkable.

A high-sensitivity and high-throughput chemical substance annotation method and system, relating to the technical field of chemical substance identification. The method comprises: by means of EISA technology, collecting parent ions and fragment ions in a sample under test; constructing a chemical exposome database; by sequentially taking chemical substances in the chemical exposome database as target chemical substances, extract a parent ion chromatogram of the sample under test; performing calibration to obtain a target chromatogram; screening all chromatographic peaks in the target chromatogram to obtain candidate chromatographic peaks and peak types thereof; for each candidate chromatographic peak, traversing matching target chemical substances, and obtaining a relevant characteristic score of each candidate chromatographic peak corresponding to the target chemical substances; on the basis of the peak types and the relevant characteristic scores, sorting all the candidate chromatographic peaks corresponding to the target chemical substances; and outputting the first several candidate chromatographic peaks in the sorting result as a final screening result of chemical substances in the sample under test. The present application can significantly increase the number of low-concentration chemical substances detected and has the advantages of high sensitivity and high throughput.

The invention belongs to the field of ion chromatography, and particularly relates to a temperature adjusting method and device for an ion chromatograph column oven, and the method comprises the steps: firstly, building a temperature change model based on the Newton's cooling law; after a heat source in the column oven begins to heat, three time points t1, t2 and t3 are selected, t3-t2 is made to be equal to t2-t1, cavity temperatures T1, T2 and T3 corresponding to temperature sensors in the column oven at the three moments are recorded, and temperature models corresponding to the moments are built; logarithms of the model formulas of the cavity temperature values T1, T2 and T3 at the three moments t1, t2 and t3 are taken and calculated to obtain a prediction model of the final cavity temperature value T; establishing an equilibrium state equation, and directly adjusting the heat source according to the calculated heat source temperature. According to the method, the waiting time after adjustment is shortened, and the time required by a temperature control system is shortened; and the temperature required to be set by the heating body can be directly obtained, and the operation can be completed through one-time adjustment without repeated adjustment, so that the energy consumption is reduced, and the working efficiency is improved.

1. The name of the product of this design: Ion Chromatograph. 2. Purpose of this design product: Mainly used for ion detection and analysis. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention discloses a construction method and application of a fucoidin fingerprint spectrum, monosaccharide composition of fucoidin is used as fingerprint spectrum research of index components, and ion chromatography fingerprint spectrums of different batches of fucoidin are constructed by optimizing an acid hydrolysis method and ion chromatography conditions. A theoretical basis can be provided for the quality control of the fucoidin. Meanwhile, the ion chromatograms of different algal polysaccharides are analyzed to find that different algal polysaccharides have differences, and reference is provided for quality control of fucoidin and algal polysaccharides from different sources.

The invention belongs to the field of ion chromatography, and particularly relates to a temperature prediction method and device for an ion chromatograph column oven, and the method comprises the steps: firstly constructing a temperature change model based on the Newton's cooling law; after a heat source in the column oven begins to heat, three time points t1, t2 and t3 are selected, t3-t2 is made to be equal to t2-t1, cavity temperatures T1, T2 and T3 corresponding to temperature sensors in the column oven at the three moments are recorded, and temperature models corresponding to the moments are built; logarithms of the model formulas of the cavity temperature values T1, T2 and T3 at the three moments t1, t2 and t3 are taken and calculated to obtain a prediction model of the final cavity temperature value T; and calculating and comparing the final temperature value T final value of the cavity with the required temperature value T required of the cavity, and adjusting the temperature T heat source of the heat source in advance. According to the method, the waiting time after each adjustment is reduced, the time required by the temperature control system is shortened, the response speed of the system is improved, the energy consumption can be reduced, and the working efficiency is improved.

The invention provides a CO2 displacement and storage real-time monitoring physical simulation device and method, and relates to the technical field of oil and gas development experiment devices. A gas injection system and a high-temperature and high-pressure displacement and storage simulation sample loader are arranged in a heating device; the gas injection system is communicated with the double-cylinder constant-pressure constant-speed pump system through a six-way valve; one end of the high-temperature and high-pressure displacement and sealing simulation sample loader is connected with the six-way valve; the upper end of the back-pressure valve is connected with the back-pressure pump in series, the lower end of the back-pressure valve is connected with the gas-liquid separation meter in series, the gas-liquid separation meter is simultaneously connected with the ion chromatograph and the gas flow meter, and the back-pressure valve is connected with the temperature and pressure data acquisition system through the pressure sensor. And the high-temperature and high-pressure displacement and sealing simulation sample loader is connected with an ultrasonic data acquisition system, a resistivity data acquisition system and a nuclear magnetic resonance imaging system. According to the invention, the pore and fluid information in the experiment process is obtained from a multi-dimensional angle and mutually complemented and verified, so that the accuracy is improved.

The utility model relates to the chromatographic technology, in particular to an ion chromatograph which comprises a conveying unit, a separation unit and a detector, the conveying unit comprises a container and a conveying pump, the ion chromatograph further comprises a sealing module and a driving module, the sealing module is arranged at an opening of the conveying pump, and the opening allows gas to pass through; the driving module is used for driving the sealing module and controlling the delivery pump to be in a first state and a second state, when the driving module is in the first state and the delivery pump operates, gas in the delivery pump is exhausted through the opening, and when the driving module is in the second state, the delivery pump is isolated from the outside at the opening. The device has the advantages of automatic maintenance and the like, and is applied to ion chromatography.

The invention provides a device and a method for measuring the concentration of organic amine in waste gas after carbon capture. The measuring device comprises a gas sampling gun, a pre-filter, a first absorption device, a second absorption device, a dryer, an air extractor and an ion chromatography device which are sequentially connected through pipelines along the gas trend, the gas inlet end of the gas sampling gun extends into the industrial waste gas runner, the gas outlet end of the gas sampling gun is connected with the gas inlet end of the pre-filter, and the outer wall of the gas sampling gun is coated with an electric heating structure. By limiting the measuring device and the measuring method, the concentration of the organic amine in the outlet waste gas of the organic amine chemical absorption method carbon capture system can be detected and analyzed, data support is provided for controlling volatilization and escape of the organic amine in the carbon capture process, and pollution of the organic amine to the ambient atmosphere is reduced.

The invention discloses a Maotai-flavor liquor process category and authenticity identification model construction method, an identification method, an identification device and equipment. The method comprises the following steps: acquiring data of liquor samples; preprocessing the sample data to obtain preprocessed sample data; the preprocessed sample data are input into an initial identification model constructed based on a graph neural network or a partial least square discrimination method, the initial identification model is trained, target identification models are obtained, and the target identification models comprise a gas chromatography identification model, an ion chromatography identification model and / or a three-dimensional fluorescence spectrum identification model. According to the method, multiple analysis technologies such as GC, IC and EEM and a chemometrics modeling analysis module are adopted, analysis results of different technologies are mutually verified, a target identification model with high prediction precision is constructed, and accurate identification of the process category and authenticity of the Maotai-flavor liquor is realized.

The invention discloses an annulus fluid sampling and detecting system and method for a high-temperature and high-pressure gas well, the system comprises a sampling pressure reduction module, a gas-liquid separation module, a component analysis module and a data acquisition module, the sampling pressure reduction module is adopted to carry out pressure reduction sampling on an annulus fluid, sampling of the annulus fluid in a high-pressure environment is achieved, and the sampling efficiency is improved. The gas-liquid separation module is used for carrying out gas-liquid separation on the annulus fluid, and the data acquisition module is used for acquiring sampling data before and after the gas-liquid separation and the component analysis module is used for analyzing and collecting the data. The component analysis module comprises a gas phase analysis unit and a liquid phase analysis unit and can realize fluid component analysis and ion component analysis, the gas phase analysis unit comprises a gas chromatograph and a hydrogen sulfide analyzer, and the liquid phase analysis unit comprises an ion chromatograph and a liquid chromatograph.

The invention relates to a method for detecting sodium phosphate for preparing an aluminum phosphate immunologic adjuvant and inorganic anions of the sodium phosphate, and the detection method is used for simultaneously detecting 9 inorganic anions or 8 inorganic impurity anions in a sodium phosphate raw material by using ion chromatography, and comprises the following steps: providing an ion chromatograph and an electric conductivity detector; providing a standard substance of each anion; preparing a reference substance solution, and mixing the reference substance solution and a test solution; precisely measuring each reference substance solution, the system applicability solution and the test solution, respectively injecting into an ion chromatograph, and recording chromatograms; and measuring and calculating the content of the eight inorganic anion impurities in the test sample according to the peak area of the chromatogram of the reference substance solution by an external standard method. The invention further relates to application of the sodium phosphate detected by the method to preparation of an aluminum phosphate vaccine immunologic adjuvant.

The invention relates to the technical field of soil element determination, in particular to a method for determining potassium, sodium, calcium and magnesium in soil soluble salt, which comprises the following steps: S1, collecting and preparing a soil sample; s2, preparing a soil sample leaching solution; s3, instrument detection; and S4, data processing and calculation. According to the method, vacuum freeze drying is combined with an ultrasonic-microwave combined extraction technology, and plasma spectrum and ion chromatography combined analysis is adopted, so that the detection efficiency and accuracy are improved, meanwhile, reagent consumption and labor cost are greatly reduced, the problems that a traditional process is tedious, consumed time is long, and precision is insufficient are solved, and the method is suitable for industrial production. The method has the advantages of being convenient to operate, environmentally friendly and the like, can be widely applied to the fields of soil salinization monitoring, agricultural land quality evaluation and geological disaster prevention and control, and provides reliable technical support for environmental protection and resource management.

The invention discloses a method for measuring the concentration of various dissolved phosphorus forms in industrial sewage. The method comprises the following steps: S1, preparing a plurality of mixed solutions with different concentrations and containing various phosphorus forms in a dissolved state, and respectively carrying out ion chromatographic analysis on the mixed solution with each concentration; establishing a standard curve of each phosphorus form according to the concentration of each phosphorus form and the chromatographic peak of each phosphorus form in the ion chromatogram corresponding to the concentration; the multiple phosphorus forms comprise orthophosphate radicals, pyrophosphate radicals, trimetaphosphate radicals and tripolyphosphate radicals; s2, adjusting the pH value of a to-be-detected industrial sewage sample to be neutral, enabling the to-be-detected industrial sewage sample to sequentially pass through the column 1, the column 2 and the column 3, and then performing ion chromatographic analysis on the water sample passing through the columns to obtain an ion chromatogram of the water sample; and obtaining the concentration of each phosphorus form in the water sample according to the ion chromatogram of the water sample and the standard curve of each phosphorus form. The purpose of automatically analyzing the concentrations of various phosphates in the industrial sewage is achieved, operation is easy, and accuracy is high.

The invention discloses an analysis method for determining the content of galactosamine in sulfated polysaccharide based on high-temperature hydrochloric acid hydrolysis and an ion chromatograph method, which comprises the following steps: hydrolyzing a test sample with hydrochloric acid at high temperature to release galactosamine, separating with an ion chromatograph and a sugar analysis column, detecting with a pulsed ampere detector, and determining the content of galactosamine in sulfated polysaccharide according to a galactosamine reference substance. And quantitatively analyzing the content of galactosamine in the test sample. The method disclosed by the invention has the advantages of simplicity, rapidness, accuracy, high efficiency, no need of derivation treatment and the like.

A method of performing mass spectrometry includes obtaining, based on a series of mass spectra of detected ions derived from components eluting from a chromatography column, a plurality of extracted ion chromatograms (XICs), each XIC comprising a plurality of detection points representing detected intensity for a distinct selected m / z as a function of time; detecting, based on the series of mass spectra, precursor ions of each distinct selected m / z of the plurality of XICs; and determining, for each XIC based on a set of detection points of the XIC, a predicted next detection point to be obtained based on a next mass spectrum to be acquired.

The invention relates to the technical field of chloride ion detection, in particular to a method for detecting the content of chloride ions in an electronic-grade organic aluminum compound. The detection method at least comprises the following steps: a sampling step; a sample treatment step: quenching the activity of the sample by using a quenching agent, heating to remove the quenching agent, and diluting with water; a sample detection step: detecting by adopting an ion chromatograph and setting a leacheate concentration gradient program; a data processing step: establishing a standard working curve equation between the chloride ion concentration and the response signal value; and the chloride ion content in the sample is calculated through the equation. According to the method for detecting the content of the chloride ions in the electronic-grade organic aluminum compound, the accuracy, safety and repeatability of the testing method can be improved, and meanwhile the detection method is low in detection limit and high in testing sensitivity.

The invention belongs to the technical field of radioactive metal isotope ion chromatographic separation, and discloses a medical radioactive isotope purification multichannel ion liquid chromatography system. The system comprises an automatic sample injection system, a parallel sampling and leaching channel, a parallel multi-column chromatographic structure, an online radiation dose monitoring module, a multi-channel tail end detection system, a recycling structure and a central control system. By adopting a full-automatic sample injection and multi-channel parallel chromatography structure, parallel separation, real-time radiation monitoring, multi-mode online detection and closed-loop recovery are realized, and the problems of insufficient nuclear purity, low separation efficiency, low target recovery rate and high radiation exposure of a traditional method are solved.

The utility model provides a system for measuring trace hydrogen chloride in hydrogen, the system comprises a drainage module, an absorption module and an analysis module, the drainage module can stably lead out the hydrogen to be detected from a main pipeline, the sampling is accurately controlled, and the accuracy and safety of the sampling are ensured; the absorption module can rapidly absorb hydrogen chloride in hydrogen to form liquid to be detected, the absorption process is stable and reliable, and the accuracy of subsequent analysis is ensured; the analysis module comprises a standard liquid storage unit and an ion chromatography unit, the formed to-be-detected liquid and standard liquid can be accurately analyzed, the ion chromatography unit can accurately measure the concentration of trace hydrogen chloride, and the reliability and accuracy of a detection result are ensured.

The application discloses a dilution pretreatment detector for ion chromatography detection of underground water and a method thereof, and relates to the technical field of water quality detection.The detector comprises a supporting shell, a dilution liquid storage cylinder is arranged in the supporting shell, an underground water storage cylinder is arranged in one side of the supporting shell, and a stirring dilution cylinder is connected to the bottom of the underground water storage cylinder and the dilution liquid storage cylinder.A series of structures are arranged, which can effectively avoid impurities from accumulating in the filter screen and the cylinder, greatly improve the impurity removal rate, provide high-purity samples for subsequent ion chromatography detection, reduce the risk of pipeline blockage and instrument damage, ensure that the sample concentration after dilution fully meets the ion chromatography detection requirements, significantly improve the accuracy and stability of the detection results, greatly improve the continuity and work efficiency of the underground water sample pretreatment, adapt to batch sample detection requirements, facilitate deep maintenance and component replacement, shorten equipment maintenance time, and reduce use and maintenance costs.

The invention relates to the technical field of analytical chemistry, in particular to an ion chromatography method for separation and detection of acetate, nitrite and nitrate ions in a complex matrix culture medium. The method mainly solves the problems of insufficient separation degree, serious matrix interference, poor detection precision and reproducibility and the like when the conventional ion chromatography technology is used for detecting a complex matrix culture medium.

The application relates to the technical field of analytical chemistry detection, and specifically discloses a rare earth ion chromatographic online analysis and detection method and system, which adopts a chromatography-mass spectrometry combined system, realizes multi-scale time-frequency decomposition of signals by constructing an adaptive wavelet base function library, accurately identifies and classifies interference types in combination with a convolutional neural network and vacuum degree coupling analysis; a U-Net generator with an attention mechanism and a multi-scale discriminator are designed for signal repair aiming at repairable interference; a state transition model containing a mass-to-charge ratio database is established, empirical mode decomposition and adaptive filtering technology are used to realize dynamic calibration of a mass axis; quantitative accuracy is ensured through double internal standard correction and a triple verification mechanism; when unrepairable interference is detected, a hierarchical self-checking program is started, and fault diagnosis is carried out in combination with spectrum fingerprint analysis.