133 results about "Ion chromatography" patented technology

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 invention relates to a method for identifying regenerated plastics, which comprises the following steps of: taking a standard substance containing a known component and an object to be detected to a pyrolysis gas chromatography-mass spectrometer (Py-GC-MS) for detecting the regenerated plastics, and firstly establishing a regenerated plastic recovery ratio regression equation corresponding to the standard substance; substituting a signal intensity value of a total ion chromatogram of a to-be-detected object corresponding to the to-be-detected object containing the known component, and judging the content of regenerated plastic of the component of the to-be-detected object through linear regression operation; moreover, according to the qualitative method provided by the invention, when the total ion chromatogram of the to-be-detected object is obtained, whether the to-be-detected object contains the reprocessed plastic corresponding to an index compound can be judged by means of the peak of the total ion chromatogram of the to-be-detected object in the index compound of the molecular weight residence time of the to-be-detected object.

An electrolytic device for an ion chromatography system includes a first electrolyte reservoir including a first electrolyte solution and a first electrode; an eluent generation chamber including a second electrode; and a first ion exchange connector coupling the eluent generation chamber to the first electrolyte reservoir. The first ion exchange connector including one or more first ion exchange membranes allowing passage of counter ions with a first charge but excluding ions with an opposite charge. The electrolytic device further includes a second electrolyte reservoir including a second electrolyte solution and a third electrode; a trap chamber including a fourth electrode; and a second ion exchange connector coupling the trap chamber to the second electrolyte reservoir. The second ion exchange connector including one or more second ion exchange membranes. The second ion exchange membranes excluding ions of the first charge but allowing passage of contaminant ions of the opposite charge.

The invention discloses a method for detecting phosphate impurities, namely diethyl phosphoacetic acid and diethyl phosphate, in afatinib, and establishes a simple and sensitive ion chromatography detection method based on the hydrolysis property of a phosphate compound under an alkaline condition. Sodium hydroxide or potassium hydroxide solution-water is used as a mobile phase for isocratic or gradient elution, and a conductivity detector is used for detection. According to the present invention, the accurate quantification of the impurities in the afatinib is achieved, the detection speed is fast, the cost is low, the operation is simple, and the good specificity, the sensitivity, the precision and the accuracy are provided, such that the product quality of the afatinib maleate bulk drug synthesized by using the diethyl phosphoacetic acid as the starting material and the related preparation can be further ensured.

The application discloses a process for separating and purifying a mixed solution of HCl and NaCl by using a chromatographic technique. Liquid containing HCl and NaCl is loaded into a chromatographic column containing an anion exchange resin, adsorbed, washed, desorbed, and the effluent is collected. The application uses acid retardation and ion exchange mechanism, adopts fixed bed technology, and realizes the purpose of removing NaCl and separating and purifying high-concentration HCl in one step. The whole process does not use acid and alkali, the Na content in the product liquid is lower than the ion chromatography detection limit, the yield of HCl reaches more than 95%, and the average concentration reaches more than 50%. + The application also uses ultrapure water as a desorbent, so that the product elution and resin regeneration are completed at the same time, and the process is simplified.

The utility model discloses a gaseous pollutant monitoring devices of semiconductor clean room gathers sample gas through the gas collection subassembly of setting in semiconductor dustless room, and the anion and cation in sample gas are dissolved as sample solution through the impact bottle, and the standard solution of different concentration gradient is diluted through the standard solution dilution subassembly, and the ion chromatography analyzer is through the responsivity of different concentration gradient standard solution to the anion and cation in sample solution, and establishes standard curve and carries out quantitative analysis, and calculates the concentration of anion and cation, realizes the monitoring to the gaseous pollutant that possibly exists in semiconductor clean room, and the equipment short circuit risk that the sample solution in impact bottle caused is effectively prevented through setting up the anti -suck back subassembly of the application, and the anti -suck back subassembly is directly set up in impact bottle, and compared with setting up anti -suck back bottle alone, saves material piece, and the anti -suck back effect is better, and the equipment is not easily affected by short circuit, prolongs the service life of equipment.

This invention provides a biomass-derived phenol composition with suppressed acidic odor. [Solution] A phenol composition containing biomass-derived phenol (A), wherein the peak height percentage corresponding to propionic acid in total ion chromatography by GC-MS after pretreatment by 150°C headspace method is 0.35% or less.

The electrostatic charge image developing toner set contains a fluorescent toner that contains a fluorescent colorant and has a brightness of 75 or more, and a non-fluorescent toner that contains no fluorescent colorant, in which an amount of Na+ on a surface of the fluorescent toner, that is measured by an ion chromatography method, is 0.005 mg / L or more and 0.050 mg / L or less, and a difference between the amount of Na+ on the surface of the fluorescent toner and an amount of Na+ on a surface of the non-fluorescent toner, that are measured by the ion chromatography method, is 0.050 mg / L or more, where the amount of Na+ is an amount of Na+ detected by a method in which 0.5 g of the fluorescent toner or the non-fluorescent toner is weighed, and then added to 100 g of deionized water at 30° C.±1° C., the mixture is dispersed by ultrasonic waves for 30 minutes, and then filtered through a filter, and the filtrate is analyzed by the ion chromatography method.

The utility model relates to an optical device which is used for carrying out ion chromatography detection on a sample and comprises a light source part which provides light with a preset wavelength range so as to form a first light beam propagating in a free space; and a flow cell provided with a guide channel, the guide channel containing the sample and provided with a first lens and a second lens, the first lens having a first clear aperture and the second lens having a second clear aperture; the ratio of the first clear aperture to the second clear aperture ranges from 1 to 3, and the ratio of the equivalent light spot size of the focusing part to the second clear aperture is not larger than 0.5, so that the ratio of the light intensity of the third light beam to the light intensity of the first light beam is not smaller than 62%. According to the device, efficient focused light beams are generated in the flow cell, and the intensity ratio of emergent light to incident light is increased, so that the light utilization efficiency is improved, and the sample detection sensitivity is improved. In addition, the utility model also relates to an analysis device.

Embodiments described herein relate to analysis of chromatography data. A system can comprise a memory that stores, and a processor that executes, computer executable components. The computer executable components can comprise a comparing component, of an analytical model, that executes a comparison, of a target characteristic of a target analyte to a first known characteristic of a first known analyte, the first known characteristic comprising a deviation relative to a second known characteristic of a second known analyte, and an identifying component, of the analytical model, that executes an identification, of the target analyte, corresponding to a target peak of a target chromatogram, which target chromatogram corresponds to target analyte chromatography data, based on the comparison.

The invention provides a detection method and detection system suitable for chemical pollutants in acid and alkali air in ambient air, and belongs to the technical field of ambient air detection.The detection method comprises the steps that H2O2 absorption liquid with the concentration being 50-200 mg / L is added into a closed absorption container, and a certain liquid level height is maintained; the outlet end of an input pipe for introducing ambient air is arranged at the bottom of the absorption liquid, the inlet end of an output pipe for leading out gas is arranged above the liquid level of the absorption liquid, the sampling flow is controlled through a sampling pump, and the absorption liquid is used for carrying out impact sampling on the ambient air; after sampling, the ion concentration in the collected sample is analyzed by ion chromatography, and is converted into the concentration of chemical pollutants in acid and alkali air. The detection method improves the sensitivity and efficiency of collection of the chemical pollutants of the acid and alkali air in the atmospheric environment, improves the timeliness of detection, and is suitable for detection of the chemical pollutants of the acid and alkali air in an electronic clean room and the ambient atmosphere.

The present embodiment relates to a manufacturing method of a laminate and the like, and the manufacturing method of the laminate includes: a preparation step of preparing a processing object, the processing object being a laminate before processing provided with a light shielding film, and a carbonic acid water cleaning step of preparing a cleaned laminate by applying a carbonic acid water cleaning process of applying ultraviolet rays and carbonic acid water to the processing object; wherein the light shielding film contains a transition metal, and further contains oxygen, nitrogen, or carbon, the laminate has a residual ion content determined by ion chromatography, the residual ions include a sulfur-based ion and a nitric acid-based ion, the content of the sulfur-based ion is greater than 0 ng / cm 2 and equal to or less than 0.1 ng / cm 2 , the content of the nitric acid-based ion is greater than 0 ng / cm 2 and equal to or less than 0.1 ng / cm 2 . The present embodiment can minimize the performance variation of the laminate, remove particles and the like existing on the outer surface or surface of the laminate, and effectively suppress unexpected haze generated in the exposure process.

The invention relates to the technical field of flux component determination, in particular to a method for determining the content of calcium fluoride in flux for corrosion-resisting steel through ion chromatography. The invention discloses a method for measuring the content of calcium fluoride in welding flux for corrosion-resisting steel through ion chromatography. The method comprises the following steps: S100, preparing a sample to be measured; s200, pretreating a to-be-detected sample, and preparing a diluted filtrate; s300, setting working parameters of the ion chromatograph; s400, calibrating an instrument, and determining by adopting an ion chromatograph; and S500, measuring the calcium fluoride content of the to-be-measured sample. The method for determining the content of calcium fluoride in the flux for corrosion-resisting steel through ion chromatography has the advantage that the welding quality is guaranteed. And the welding flux does not need to be subjected to experimental detection before welding, so that the welding flux is saved.

The present application provides a method for determining extractable organic fluorine in textiles by online combustion-ion chromatography system, and relates to the technical field of textile detection. The method specifically comprises the following steps: weighing the textile, immersing the textile in an organic solvent, then performing ultrasonic extraction to obtain an extraction solution; cooling and concentrating the extraction solution, using the same organic solvent to make up the volume to obtain a sample solution; adding n-hexanol to the sample solution for solvent replacement to obtain a test solution; burning the test solution under rich-oxygen high-temperature hydrolysis conditions, using pure water to absorb the generated gas to obtain an absorption solution; using an ion chromatograph to determine the content of fluorine ions in a fluorine ion standard working solution and the absorption solution respectively, drawing a standard working curve, and quantitatively calculating the content of extractable organic fluorine in the textile by external standard method. The method is verified by various textiles, and has good robustness; the loss of volatile substances and background pollution are effectively reduced, and the stability and accuracy of detection are improved.

The invention discloses a high-alkalinity solution pretreatment method and a high-alkalinity solution pretreatment device for determining zwitterion content by ion chromatography, and belongs to the technical field of zwitterion content determination. The system disclosed by the invention comprises a water bath heating module, a condensation system, a three-way pipe, an ammonia absorption system, a monitoring system and a control system, an outlet of the water bath heating module is connected with an inlet of the condensation system; an outlet of the condensation system is connected with a first port of the three-way pipe; a second port and a third port of the three-way pipe are respectively connected with inlets of the ammonia absorption system and the monitoring system; the control system is electrically connected with the monitoring system and the water bath heating module respectively. The system can improve the accuracy of measuring the content of the zwitterions in the high-alkalinity solution.

The application discloses a method for degrading brominated organic pollutants in water by using UV / H2O2, and first establishes a high-level oxidation treatment method for brominated pollutants in water by combining UV and H2O2, determines the initial concentration of the brominated pollutants and the adding proportion of the oxidant H2O2 by using absorbance, Lambert-Beer law and the principle of absorbance additivity, and verifies the rationality of the concentration settings of the brominated pollutants and the oxidant in the kinetics evaluation, and further establishes a detection method for bromide ions, which, compared with the traditional ion chromatography method, does not need an additional pretreatment process, avoids the matrix interference of coexisting organic matters, and greatly saves the experimental and instrument use costs; for the identification of degradation products, the method established by the application accurately detects the evolution trend of more than twenty structural molecules in the examples along with the treatment process, and the method can be widely applied to the wastewater treatment of brominated flame retardants, brominated phenols and other bromine-containing organic matters in the environment.

This invention provides a biomass-derived phenol composition in which moldy odor is suppressed. [Solution] A phenol composition containing biomass-derived phenol (A), wherein the peak height percentage corresponding to isobutyraldehyde in total ion chromatography by GC-MS after pretreatment by 150°C headspace method is 4.0% or less.

The present application relates to the field of intelligent agricultural mycorrhizal fungus fertilizer production and application, and discloses a method and application for intelligent soil testing, mycorrhizal fungus fertilizer preparation, quality improvement and soil improvement, which is based on the use of full spectrum direct reading plasma emission spectrometry IPC-OES / ICP-MS, elemental analyzer VarioEL, ion chromatography HPIC combination, and qualitative and quantitative exchange capacity CEC, discloses a method and application for intelligent soil testing, mycorrhizal fungus (AMF) fertilizer preparation, quality improvement and soil improvement by using a chlorophyll nitrogen dynamic monitoring (SPAD value) instrument, a phosphorus online detector and a potassium online detector, which uses a double cultivation and propagation method of mycorrhizal fungus hypha secretion of sphaerocystin, activates plant related gene pathways, improves the quality of crops such as food, vegetables, tobacco leaves and Chinese herbal medicines, and the drought resistance, cold resistance and disease resistance of the crops, forms soil aggregates, increases soil porosity, effectively relieves compaction, and reduces the use amount of chemical fertilizer by 60-80% and pesticide by 70-90%.

A carbon material is described that contains at least carbon, nitrogen and bromine as elemental components, in which the bromine content, measured by a combustion ion chromatography method, is 50 to 100,000 ppm, based on mass, and the number of carbon atoms C xps and the number of nitrogen atoms N xps , both of which are quantified by X-ray photoelectron spectroscopy, 0.005 ≤ N xps / C xps ≤ 0.300

The invention is applicable to the field of ion chromatography detection, and provides an electric conductivity detection and optical detection combined ion chromatography detector, which comprises a detection base, grooves are formed in the upper end and the lower end of the base, and electrode plates are installed in the grooves. Wherein a flow path is arranged in the middle of the detection base, the flow path is in a linear form in the detection base and penetrates through the detection base, and a liquid inlet connector and a liquid outlet connector which are communicated with the flow path are formed in the detection base; quartz lenses corresponding to the two ends of the flow path respectively are mounted on the detection base; a lamp panel fixing seat and a PD light source receiving plate are respectively mounted on two side surfaces, corresponding to the two groups of quartz lenses, of the detection base; through holes corresponding to the flow paths are formed in the lamp panel fixing seat and the PD fixing seat; lamp panels corresponding to the through holes in position are mounted on the lamp panel fixing seat; and a PD light source receiving plate corresponding to the position of the through hole is mounted on the PD fixing seat. Therefore, the device can carry out conductivity detection and optical detection at the same time; and the structure is compact and the size is small.

The present application relates to the field of pharmaceutical excipient detection, in particular to a method for quantitatively detecting calcium stearate and magnesium stearate in preparations by ion chromatography. The present application draws the standard curves of calcium / magnesium ions and excipients calcium stearate / magnesium stearate respectively, obtains the slope ratio of the two, obtains the conversion coefficient of the content of calcium / magnesium ions in calcium stearate / magnesium stearate, so as to accurately detect the content of calcium stearate or magnesium stearate in preparations. The detection method has high sensitivity, strong specificity, high precision, strong accuracy, simple and fast operation, wide applicability, low detection cost, realizes the quantitative detection of common excipients calcium stearate / magnesium stearate in preparations, thereby effectively guiding the self-prepared preparations to be consistent with the reference preparation prescription.

The invention provides a method for detecting sulfamate and sulfate in a topiramate bulk drug, which is suitable for the technical field of detection of impurity control of organic chemical synthesis bulk drugs, especially in the organic synthesis process of bulk drugs. An ion chromatography detection method for monitoring synthesis of potential residual inorganic anion impurities is needed. The analysis method overcomes the limitation that the existing method (such as turbidimetric method) is poor in specificity and cannot detect simultaneously, shortens the analysis time, simplifies the components of the mobile phase, and increases the sensitivity and the accuracy. According to the method, separation and detection are carried out in a gradient elution mode through an ion chromatography method, a chromatographic column is an anion exchange chromatographic column and an electrical conductivity detector, and a mobile phase is a potassium hydroxide solution. The method for detecting the sulfamate and the sulfate in the topiramate bulk drug is good in separation degree, high in specificity, high in precision and good in repeatability, and meets methodological research on determination of the sulfamate and the sulfate in the topiramate bulk drug.

The invention discloses a quantitative detection method for nitrate radicals in a tin hydroxide sample and application thereof, and belongs to the technical field of chemical analysis, and the method comprises the following steps: water extraction: adding 50 mL of deionized water into a tin hydroxide sample to be detected, uniformly mixing, carrying out ultrasonic treatment at 50 DEG C for 15 min, cooling to room temperature, transferring the mixture into a 200 mL or 500 mL volumetric flask, adding deionized water to a scale line, and carrying out water extraction; obtaining a mixture; solid-liquid separation: filtering the mixture through a 0.45-micron filter membrane of a diaphragm vacuum pump to obtain a clarified extract; and ion chromatography detection: injecting the extract liquor into an anion exchange chromatographic column of an ion chromatograph, and quantitatively detecting nitrate radicals through a suppression type conductivity detector. The pretreatment is simple, and the detection is high-throughput and automatic; the sensitivity is high, the detection limit is low, and the anti-interference performance is strong; detection data are accurate, and production process requirements are met.

Provided are new and improved novel processes and continuous ion exchange / continuous ion chromatography (CIX / CIC) systems for the separation of iron and zinc from electric arc furnace baghouse dust.

The invention belongs to the technical field of cartilage extracts, and particularly relates to application of a salmon nasal cartilage extract in preparation of a product for improving bone mineral density. The preparation method of the extract comprises the following steps: 1) performing low-temperature extraction on salmon nasal cartilage homogenate by using guanidine hydrochloride, centrifuging, and dialyzing to intercept total protein with the molecular weight of more than 8000; 2) adding precooled acetone into the total protein for fractional precipitation, and freeze-drying to obtain fractional precipitation protein; 3) dissolving the fractional precipitation protein in diluted hydrochloric acid, adding trypsin, and carrying out light-shielding enzymolysis to obtain an enzymatic hydrolysate; and (4) carrying out hydroxyapatite ion chromatography on the enzymatic hydrolysate, and carrying out ultrafiltration to intercept components with the molecular weight of less than 3kDa, so as to obtain the salmon nasal cartilage extract. The extract can significantly improve the multiplication capacity of embryo osteogenesis cell strains, can improve the bone mineral density value of shin bones of SD rats, has wide application prospects in the fields of food, health care products and medicines, and is especially suitable for development of bone health related products.

This invention discloses a multimode liquid chromatography packing material for aminated silica gel modified with an interpenetrating network hydrogel, its preparation method, and its applications, relating to the field of high-performance liquid chromatography (HPLC) separation and analysis technology. The packing material is obtained by modifying the surface of aminated silica gel with an interpenetrating network hydrogel formed from carboxymethyl chitosan and poly(N-isopropylacrylamide) using chemical polymerization. The packing material provided by this invention can be used for the separation and analysis of compounds of different polarities. The interpenetrating network structure formed by the two monomers gives the hydrogel-modified layer higher mechanical strength, and the different interaction sites enable multimode (hydrophilic chromatography mode, hydrophobic chromatography mode, and ion chromatography mode) separation and analysis of compounds with different polarities. The preparation method provided by this invention is simple, and the prepared packing material has significant application potential in the field of chromatographic separation and analysis.

The invention discloses a method for detecting dimethylamine in levofloxacin, which comprises the following steps: weighing levofloxacin, adding a diluent for dissolving and diluting, and taking filtrate to obtain a test solution; taking a dimethylamine hydrochloride reference substance, and adding a diluent for dissolving and diluting to obtain a reference substance solution; respectively injecting the reference solution and the test solution into an ion chromatograph, recording chromatograms, and calculating by peak areas according to an external standard method to obtain the content of dimethylamine. According to the method for detecting the dimethylamine in the levofloxacin, the content of the dimethylamine in the levofloxacin is measured through the ion chromatography, the method is simple, convenient and feasible, high in specificity, high in accuracy and good in repeatability, the method has the advantages of being high in detection sensitivity, the content of the dimethylamine in the levofloxacin raw material can be accurately and sensitively detected, and the detection cost is low. Therefore, the quality of the levofloxacin raw material is ensured.

The invention discloses an ion chromatography method for determining netilmicin sulfate related substances, which adopts an ion chromatography determination method, and a chromatographic column is selected from Welch LP-C18 or other chromatographic columns with equivalent efficiency; 0.05% pentafluoropropionic acid solution-acetonitrile is used as a mobile phase A, 0.2 mol / L trifluoroacetic acid solution-acetonitrile is used as a mobile phase B, gradient elution is performed, alkali is added behind a column, a detector is an integral pulse ampere electrochemical detector, the column temperature is 30-40 DEG C, the flow velocity is 0.6-1.0 mL / min, and the sample size is 20-30 [mu] L. The method disclosed by the invention is good in precision, high in accuracy, good in repeatability and strong in specificity, and can be used for rapidly and accurately determining the related substances of netilmicin sulfate.

The invention relates to a chromatography method of producing a target elution volume comprising a first and a second target protein. The method includes providing a cation exchange chromatography column; applying a protein solution on the column, the protein solution comprising the first target protein, a second target protein and optionally one or more further proteins; inputting an optimization criterion; computing chromatography simulations for computing an elution buffer salt concentration adapted to provide a target elution volume matching the optimization criterion best; computing the pooling borders of the target elution volume as a function of at least the computed salt concentration and the input optimization criterion; applying an elution buffer having the computed salt concentration on the chromatography column; performing the elution; and collecting the computed target elution volume.