139 results about "Ammonium acetate" patented technology

The invention discloses a phototherapy reagent and a preparation method and application thereof. The preparation method comprises the following steps: 1-[4-(diethylamino) phenyl]-ethane-1-ketone and 4-methoxybenzaldehyde are subjected to a condensation reaction in a NaOH ethanol solution, and a product and nitromethane are subjected to addition; performing condensation and addition on the other groups of raw materials by the same method; cyclizing the two addition products with ammonium acetate, and coordinating with boron trifluoride diethyl etherate to obtain NHM; carrying out substitution reaction on the NHM and sodium nitrite to obtain NOO; and oxidizing NOO by m-chloroperoxybenzoic acid to obtain NNOO. The reagent can target a tumor hypoxia microenvironment, hypoxia monitoring is achieved, NO is released through photostimulation for tumor gas therapy, meanwhile, the secondary amplification photo-thermal therapy effect is achieved, preparation is controllable, diagnosis and treatment are integrated, and the reagent is sensitive, safe and suitable for biomedical research and clinical diagnosis.

The application discloses a detection method and application of a fingerprint spectrum and a mark characteristic effective component of compound tung oil for burns and a detection method of the fingerprint spectrum, and the detection method of the fingerprint spectrum comprises the following steps: preparing a sample solution and a standard control solution of the compound tung oil for burns, and adopting HPLC chromatography to construct the fingerprint spectrum of the compound tung oil for burns; the HPLC chromatography conditions for constructing the fingerprint spectrum of the compound tung oil for burns comprise the following steps: adopting an octadecyl silica water-resistant analysis column chromatographic column, adopting methanol (A) and 0.08-0.12% ammonium acetate (B) as a mobile phase, adopting a flow rate of 0.5-0.7 mL / min, and adopting a sample injection amount of 5-15 muL. The method system is reliable in results and provides a scientific screening method for quality control of the compound tung oil for burns.

The invention belongs to the technical field of glycine preparation, and particularly discloses a preparation method of glycine. The method comprises the following steps: controlling the reaction temperature, efficiently synthesizing ammonium chloroacetate from chloroacetic acid and liquid ammonia in a reactor, carrying out catalytic ammonolysis on the ammonium chloroacetate and ammonia gas in a reactor filled with a solid catalyst to realize continuity and reinforcement of the process, and carrying out alcohol precipitation crystallization, separation and purification to obtain glycine. The solid catalyst provided by the invention has the advantages of simple preparation, reproducibility, long service life, no metal pollution, easily available raw materials, controllable cost, long-acting cyclic utilization, high efficiency, simple recovery and the like; the method for preparing glycine by using the solid catalyst solves the problems of high consumption, high recovery cost, low production and purification efficiency and pollution caused by the traditional catalyst, and is a key technology for green and low-cost industrial production of glycine.

The invention discloses an in-situ leaching liquid injection system and method for high-altitude ionic rare earth ore, and belongs to the field of rare earth hydrometallurgy. The system is composed of a liquid injection well pattern, a layered liquid injection device, a first liquid supply system, a second liquid supply system and a collection system. Exploring the thickness of an ore body weathering crust and vertical distribution of rare earth / impurities; the liquid injection hole is vertically divided into an upper layer liquid injection area (1 / 3-1 / 2 of the upper part) and a lower layer liquid injection area (1 / 2-2 / 3 of the lower part); a 1.0-1.4 wt% low-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the upper layer, and co-leaching of impurities such as aluminum and iron is reduced; 1.5-2.5 wt% of high-concentration diethylenetriamine-ammonium acetate composite leaching agent is injected into the lower layer to ensure efficient leaching of rare earth; and rare earth-rich leaching liquid is collected. Compared with a traditional full-layer high-concentration process, the method has the advantages that the use amount of a leaching agent is reduced by 20-40% while the rare earth leaching rate is kept to be larger than or equal to 90%, the aluminum ion concentration of the leachate is reduced by 30-60%, the agent cost and the follow-up impurity removal load are remarkably reduced, and the method is particularly suitable for the high-altitude, low-temperature, low-air-pressure and thick-weathered crust environment.

FIELD: pharmacology.SUBSTANCE invention can be used to determine the concentration of an anti-tuberculosis drug in blood serum. The method for determining the concentration of bedaquiline in the blood serum in patients with tuberculosis or mycobacteriosis is that whole blood samples are centrifuged at 3000 rpm for 20 minutes, then the blood plasma is collected in sterile 1.5 mL Eppendorf tubes, then 900 mcL of acetonitrile are added to 300 mcL of plasma and centrifuged at 13500g for 15 minutes, then 1 mL of the supernatant is transferred to a chromatographic vial and make the assay by UHPLC MS / MS using an Athena UHPLC C18, 1.8 mcM, 120A, 2.1×100 mm chromatography column, when using an aqueous solution containing 5 g / L of ammonium acetate, 25 ml / L of concentrated acetic acid, 2 ml / L trifluoroacetic acid as mobile phase A and 100% acetonitrile as mobile phase B, the concentration of bedaquiline is determined using a pre-plotted calibration curve.EFFECT: determination of bedaquiline in human blood plasma in a time not exceeding 6 minutes.1 cl, 9 dwg, 6 tbl

This invention relates to the field of high-purity material analysis technology, and discloses a method for simultaneously separating and enriching copper, cadmium, nickel, cobalt, zinc, lead, and barium in lithium carbonate. The steps are as follows: dissolving a lithium carbonate sample in nitric acid to obtain an acidified sample solution; adjusting the acidified sample solution to an alkaline pH range of 9.5-10.5 using an ammonia-ammonium acetate alkaline buffer solution; passing the alkaline solution through a solid-phase extraction column filled with iminodiacetic acid-type chelating resin, where copper, cadmium, nickel, cobalt, zinc, lead, and barium ions are selectively adsorbed onto the resin; and eluting the adsorbed heavy metal ions with acid to achieve separation and enrichment. This invention effectively overcomes the inhibition and interference of the lithium carbonate matrix on the detection of trace heavy metals, and in particular significantly improves the adsorption and recovery rate of elements such as barium. It achieves efficient separation and enrichment of multiple heavy metals in complex matrices, providing a reliable pretreatment solution for high-sensitivity and high-accuracy quality control analysis of lithium carbonate products.

The application discloses a kind of belongs to analytical detection technical field, specifically related to a kind of determination method of etomidate content in electronic cigarette oil, comprising the following steps: using step-by-step dilution method to pretreat the electronic cigarette oil to be measured to obtain test sample;Using high performance liquid chromatography tandem mass spectrometry technique to determine the content of etomidate in the test sample;The chromatographic conditions in the high performance liquid chromatography tandem mass spectrometry technique include: chromatographic column: n-octadecyl column;Mobile phase A phase: 4mmol / L-6mmol / L ammonium acetate+0.05% (v / v)-0.15% (v / v) formic acid aqueous solution;Mobile phase B phase: methanol.The determination method of etomidate content in the electronic cigarette oil can not only greatly save the solvent usage amount, but also can ensure the accuracy of detection, reduce the influence of matrix effect.

The invention discloses a method for determining barium sulfate in fluorite mine. The method comprises hydrochloric acid, nitric acid, hydrofluoric acid, sulfuric acid-hydrochloric acid mixed acid, ammonium acetate and sulfuric acid. The determination method of barium sulfate in fluorite mine comprises the following steps: S1, reagent proportioning; s2, selecting an instrument; s3, preparing a sample; s4, step analysis; s5, calculating a result; and S6, matters needing attention. The invention belongs to the technical field of mineral composition analysis, and particularly relates to a method for measuring barium sulfate in fluorite mine, which comprises the following steps: firstly, treating a sample with hydrochloric acid, nitric acid and hydrofluoric acid, evaporating to be nearly dry, dissolving soluble salts with a hydrochloric acid-sulfuric acid mixed solution, then filtering, burning filter residues, and finally weighing to obtain the weight of barium sulfate. The method is simplified and optimized on the basis of a national standard method, the method is convenient and fast to operate, the time is greatly shortened, and the result is stable. The method is suitable for the fields of mine production, laboratory rapid detection and the like.

The invention belongs to the technical field of vitamin content detection, and particularly relates to a method for measuring the content of various water-soluble vitamins B. The water-soluble vitamins B comprise vitamin B1, vitamin B2, vitamin B3, vitamin B6, vitamin B7, vitamin B12 and nicotinamide. A high performance liquid chromatograph and an electrospray detector are used as detection instruments, and chromatographic conditions are as follows: a mobile phase A is ammonium formate or ammonium acetate, a mobile phase B is methanol, and gradient elution is performed; the gradient elution procedure is as follows: a solvent of a test sample is a mixed solution of acetonitrile, water and glacial acetic acid, and the volume ratio of the acetonitrile to the water to the glacial acetic acid is 5: 95: 0.5; the atomization temperature of the electrospray detector is 35 DEG C; the method is better in separation degree and higher in specificity and sensitivity.

The application relates to the field of catalysts, and discloses a Cu-SSZ-13 molecular sieve catalyst with high-temperature sulfur resistance and a preparation method and application thereof. The preparation method comprises the following steps: dissolving ammonium acetate in deionized water, putting into H-type SSZ-13 molecular sieve for ion exchange, drying the obtained product after suction filtration, and obtaining NH4-type SSZ-13 molecular sieve; putting the NH4-type SSZ-13 molecular sieve into a copper acetate monohydrate solution for ion exchange, using acetic acid to control the pH during the ion exchange process; and suction filtering, drying and calcining the obtained product to obtain the Cu-SSZ-13 molecular sieve catalyst with high-temperature sulfur resistance. The application takes the H-type SSZ-13 molecular sieve as raw material, carries out twice ion exchange under the condition of controlling the acidity and alkalinity, controls the copper species into divalent copper ions in the obtained catalyst, and has obvious advantages in the high-temperature window in terms of the sulfur resistance.

The application discloses a method for simultaneously detecting 18 kinds of amino acids in Daqu based on high-resolution liquid chromatography-mass spectrometry, and belongs to the technical field of liquor detection. Chromatographic conditions of the method include that an ethylene bridge hybrid particle with surface-bonded amide groups is used as a filler, ammonium acetate-formic acid aqueous solution is used as mobile phase A, and acetonitrile is used as mobile phase B for gradient elution; mass spectrometry conditions include that an H-ESI ion source is used, the spray voltage in the positive ion mode is 3000-4000 V, and the spray voltage in the negative ion mode is 2000-3000 V; qualitative analysis is performed according to mass-to-charge ratios of the 18 kinds of amino acids, and quantitative analysis is performed by using a standard curve method. The method has the characteristics of simple pretreatment operation, easy-to-obtain reagents, high extraction efficiency and good stability, can realize synchronous and accurate qualitative and quantitative analysis of the 18 kinds of amino acids, and provides reliable data support for flavor substance research of Daqu.

The invention relates to a preparation method of tetramethylpyrazine, which is characterized in that 3-hydroxy-2-butanone and ammonium acetate are used as raw materials, a potassium hydrogen persulfate compound (Oxone) is used as an oxidizing agent, and 2, 3, 5, 6-tetramethylpyrazine is prepared through reaction. The preparation method has the beneficial effects that the reaction is rapid, the condition is mild, an organic solvent is not needed, and industrial popularization is easy; the color of a reaction system solution in the reaction process is light, and the reaction solution can be used mechanically, so that the green, environment-friendly and safe production and purification processes of the product are realized; the prepared product can be directly obtained in a filtering mode, and the product is high in purity, good in appearance, high in yield and suitable for one-pot production.

The application relates to the field of liquid chromatography analysis, and provides a method for high-performance liquid chromatography analysis of DNA dyes, which comprises the following steps: performing high-performance liquid chromatography analysis on a DNA dye-containing sample to be measured; wherein the DNA dye comprises at least one of PicoGreen and SYBR Green I; the high-performance liquid chromatography analysis adopts gradient elution, and mobile phase A, mobile phase B and mobile phase C are mixed in different proportions as mobile phases; the mobile phase A comprises at least one of acetonitrile and methanol; the mobile phase B comprises at least one of phosphoric acid aqueous solution, formic acid aqueous solution and trifluoroacetic acid aqueous solution; and the mobile phase C comprises ammonium acetate aqueous solution. The method can be used for detecting the purity of Picogreen, SYBR Green I and the DNA dyes, and realizes effective separation of target peaks and impurity peaks.

The invention belongs to the technical field of PbS quantum dots, and discloses a PbS quantum dot film, a preparation method thereof and a photoelectric device comprising the PbS quantum dot film, the preparation method comprises the following steps: 1) dissolving oleic acid coated PbS quantum dot solid in a non-polar solvent to form a first solution; 2) dissolving haloid, ammonium acetate and short-chain mercaptan in a polar solvent to form a second solution; (3) mixing the first solution and the second solution to form a mixed solution, standing, layering, removing supernatant, performing centrifugal treatment on subnatant, and drying precipitate subjected to centrifugal treatment to obtain PbS quantum dot solid powder; and 4) dissolving the PbS quantum dot solid powder obtained in the step 3) in a dispersant to obtain a dispersion liquid, coating the dispersion liquid on a substrate, and carrying out annealing treatment on the dispersion liquid to form the PbS quantum dot film. Through the synergistic effect of halogen and short-chain mercaptan, an ionic and covalent dual passivation mechanism is realized, and comprehensive defect passivation of PbS is realized.

Provided are: a separation solution for an aluminum foil laminate, which can reduce elution of an aluminum foil into the separation solution and reduce the amount of impurities when a recovered aluminum foil is melted and cast, and which has sufficient ability to separate an aluminum foil laminate into a resin and an aluminum foil; and a method for separation and recovery of an aluminum foil laminate using same. The present invention is capable of providing a separation solution for an aluminum foil laminate, which contains an ammonium salt comprising at least one of ammonium formate and ammonium acetate, one or more acids selected from the group consisting of nitric acid, sulfuric acid, phosphoric acid, formic acid and acetic acid, and water, the separation solution being characterized in that a content ratio obtained by dividing the content (mass%) of the ammonium salt in the separation solution by the content of the acid (mass%) in the separation solution is 0.1-40.0.

The present application relates to a method for determining high content copper, lead and zinc in polymetallic ore and copper-lead-zinc alloy by ICP-AES, and belongs to the technical field of ICP-AES analysis and testing, and the specific steps are as follows: the polymetallic ore and copper-lead-zinc alloy sample is decomposed into wet salt by aqua regia; then hydrochloric acid-ammonium acetate mixed extraction liquid is added, and the mixture is heated to micro-boiling for 10-15 min; the extracted sample is diluted with deionized water in a 250 mL volumetric flask; the diluted sample is shaken and left to clarify; 5 mL of supernatant solution is taken out with a 10 mL large-volume pipette and placed in a 50 mL colorimetric tube, 5 mL of hydrochloric acid-ammonium acetate mixed extraction liquid is added, and the mixture is diluted and shaken; the obtained sample is subjected to ICP-AES testing to determine the content of copper, lead and zinc. The present application avoids complicated operation, solves the problem of serious low test results caused by mutual influence of lead, copper and zinc during testing, and can improve the testing accuracy of high content copper, lead and zinc in polymetallic ore and copper-lead-zinc alloy.

The application belongs to the technical field of battery materials, and specifically discloses a preparation method of battery-grade trimanganese tetraoxide. The application first mixes a complexing agent, a pH regulator and an ethanol aqueous solution to obtain a mixed solution; then the mixed solution is mixed with a manganese source to perform a complexing dissolution reaction; after the reaction is completed, oxygen is introduced into the mixed solution to sequentially perform an oxidation reaction, an induced hydrolysis assembly and aging, so as to obtain the battery-grade trimanganese tetraoxide; the complexing agent comprises one or more of glycine, sodium glutamate, ammonium acetate, triammonium citrate and aminotri (methylene) phosphonic acid. The preparation method provided by the application has the advantages of few steps, short path and low energy consumption; and the trimanganese tetraoxide obtained finally has the advantages of stable properties, high quality, high sphericity and high manganese content.

The application relates to the technical field of desulfurizers, and particularly discloses an iron-based desulfurizer and a preparation method thereof. The preparation method of the iron-based desulfurizer comprises the following steps: S1: mixing iron salt, ferrous salt, manganese salt and zinc salt in water in a molar ratio of (1.2-2.0):1:(0.05-0.08):(0.03-0.05), heating to 35-45 DEG C, blowing in air, adding an alkali solution, reacting for 20-30 min, and controlling the final pH of the reaction to be 8.0-8.5, then performing solid-liquid separation, washing, drying, and obtaining a precursor; and S2: uniformly mixing the precursor, a composite pore-forming agent, a binder and an oxygen storage agent, shaping, drying at 80-115 DEG C, and obtaining the iron-based desulfurizer; the composite pore-forming agent comprises ammonium bicarbonate and ammonium acetate. The iron-based desulfurizer prepared according to the application has high sulfur capacity and regeneration cycle retention rate.

This application provides a method for detecting sodium dodecylbenzenesulfonate (SDBS) in plant samples, comprising: washing, freeze-drying, pulverizing and sieving the plant sample to obtain plant sample powder; performing multiple ultrasonic-assisted extractions on the plant sample powder using a methanol-water mixed solvent; combining and collecting the extracts; diluting the combined extracts with water; loading the extracts onto a weak anion exchange solid-phase extraction column for purification; eluting with ammonium acetate buffer solution; eluting with an organic solvent containing alkaline components; collecting the eluent containing the target analyte; concentrating the eluent to near dryness under controlled temperature conditions with nitrogen blowing; redissolving the eluent; filtering the eluent through a filter membrane to obtain the test solution; and qualitatively and quantitatively analyzing the sodium dodecylbenzenesulfonate in the test solution using liquid chromatography-tandem mass spectrometry (LC-MS / MS). This invention overcomes the interference of complex components in the plant matrix through a specific extraction system and selective purification, achieving quantitative analysis of SDBS.

The application provides a high-efficiency extraction method suitable for exchangeable base ions in acid and neutral soil, which comprises the following steps: placing soil to be detected and an ammonium acetate exchange solution in a centrifugal tube and performing magnetic stirring, filtering and collecting the filtrate, and performing determination of exchangeable base ions in acid and neutral soil. Compared with the prior art, the application has the following advantages: reagent and water resources are greatly saved; the operation process is greatly simplified; the extraction efficiency is significantly improved; the sample weighing standard is scientific and clear; the determination data quality and instrument safety are improved; and the error risk is reduced. The application realizes a breakthrough in high efficiency, energy saving, material saving and labor saving by combining the innovations of "reducing the concentration, reducing the dosage, strengthening the stirring and optimizing the sample weighing", and fundamentally reconstructs the extraction process of exchangeable base ions in acid and neutral soil, and realizes a breakthrough in high efficiency, energy saving, material saving and labor saving under the premise of ensuring the accuracy equivalent to the traditional method.

The application discloses a method for recovering manganese and lead in zinc anode slime with the aid of a reducing agent, and belongs to the field of hydrometallurgy. The method for recovering manganese and lead in zinc anode slime uses thiourea as a reducing agent, dilute sulfuric acid as a leaching agent to extract metal manganese and lead in zinc anode slime, and obtains high-value elemental sulfur. In addition, ammonium acetate and oxalic acid are used as a leaching agent and a precipitant respectively to separate lead and sulfur from acid leaching residue. The recovery method has mild reaction conditions, high leaching rate, small residue amount, low cost and is easy to produce.

The invention discloses a method for preparing ammonium thioglycolate from thionocarbamate production waste liquid, which comprises the following steps: 1) adding acid into the thionocarbamate production waste liquid to obtain a solution containing thioglycolic acid; (2) extracting the solution containing mercaptoacetic acid by adopting an extracting agent to obtain an extracting solution containing mercaptoacetic acid; the extraction agent comprises an amine extraction agent; and (3) carrying out back extraction on the extracting solution containing mercaptoacetic acid by adopting ammonia water, so as to obtain a back extraction solution containing ammonium mercaptoacetate. According to the method, ammonium thioglycolate is prepared from the thionocarbamate waste liquid, so that the problem of recycling the sodium thioglycolate waste water generated in the thionocarbamate production process is solved, and ammonium thioglycolate with relatively high economic value is obtained. In addition, the extraction process in the method can also realize separation of sodium salt and other organic impurities in the wastewater containing sodium thioglycollate.

The invention discloses a wide-voltage-window electrolyte for an aqueous zinc-based battery and a preparation method and application of the wide-voltage-window electrolyte for the aqueous zinc-based battery, and the wide-voltage-window electrolyte for the aqueous zinc-based battery comprises a solute, a solvent, a first functional additive and a second functional additive, the solute is at least one of zinc sulfate, zinc acetate, zinc trifluoromethanesulfonate and bis (trifluoromethylsulfonyl) imide zinc, the solvent is a mixture of water and acetonitrile, the first functional aid is at least one of potassium acetate and ammonium acetate, and the second functional aid is fluoroethylene carbonate. According to the invention, the volume ratio of water to acetonitrile in the solvent is precisely regulated and controlled, and the first functional aid and the second functional aid are added, so that a wide voltage window of 0.1-3.1 V is obtained, the zinc ion conductivity at 25 DEG C is ensured to be greater than 5.0 mS / cm, and the technical problem that the voltage window and the ion conductivity are difficult to consider at the same time in the prior art is solved; and thus, the charging and discharging stability of the zinc-iodine battery is improved.

The invention discloses a large-steric-hindrance bidentate diaryl oxepino imidazole onium salt with a structure as shown in a formula L as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a compound 1, a compound 2, formaldehyde and ammonium acetate into a solvent, reacting at 70-130 DEG C, and purifying to obtain an intermediate product S; and (2) carrying out reaction on the intermediate product S and a compound 3 in an organic solvent at 120-170 DEG C, and purifying to obtain the large-steric-hindrance bidentate diaryl oxepino imidazole onium salt L. The large-steric-hindrance bidentate diaryl oxepino imidazole onium salt is used as a ligand to replace a phosphine ligand, a carbon-nitrogen coupling reaction of aromatic ammonia can be efficiently catalyzed only by a small amount of copper salt, and the reaction yield is remarkably increased.

The application discloses a method for recovering high-quality lead from waste lead storage battery lead paste by wet electrolysis, and belongs to the technical field of lead paste recovery. The method is used for solving the technical problems that the existing technology has a complex process, high energy consumption and the purity of recovered lead needs to be further improved in the process of recovering lead from lead paste. The method comprises the following steps: lead paste and sulfuric acid are added into a beaker, and then are immersed at room temperature for 18-20 hours; then the beaker is transferred to an iron stand with mechanical stirring; sulfurous acid is added into the beaker, and then is reacted at room temperature for 4-6 hours; and pretreated lead paste is obtained through post-treatment; and the pretreated lead paste and an ammonium acetate aqueous solution are added into a nitrogen-protected three-neck flask and are stirred. The method not only effectively simplifies the process flow of extracting lead from lead paste, reduces industrial energy consumption, but also reduces the impurity content in recovered lead while improving the lead recovery rate, and improves the quality of recovered lead.

The invention provides a high performance liquid chromatography detection method of L-homoserine lactone hydrochloride, which comprises the following steps: diluting a test sample containing L-homoserine lactone hydrochloride with a diluent to obtain an L-homoserine lactone hydrochloride solution, filtering the L-homoserine lactone hydrochloride solution, and detecting the filtered L-homoserine lactone hydrochloride solution in a high performance liquid chromatograph, a CAD detector is adopted as a detector; the chromatographic column is formed by chemically bonding hydrophilic groups on organic mixed silica gel particles; the mobile phase comprises a mobile phase A and a mobile phase B, wherein the mobile phase A is acetonitrile or methanol; and the mobile phase B is an ammonium formate or ammonium acetate aqueous solution. Under the chromatographic conditions, after a base line is stable, samples are sequentially injected according to the sequence of standard sample solutions and test sample solutions with multiple gradient concentrations, standard sample solution map data and test sample map data with multiple gradient concentrations are obtained, then a standard curve of the concentration and the peak area is made, and the content of the L-homoserine test sample is calculated by combining the weighing amount of the L-homoserine test sample.

The invention relates to the technical field of pharmaceutical analysis, and particularly discloses a method for detecting related substances in a key parent nucleus of cefcapene pivoxil hydrochloride. Detection is carried out according to the following high performance liquid chromatography conditions: a chromatographic column is GL Sciences InertSustaiin C18, 4.6 mm * 250 mm, 5 [mu] m, and the column temperature is 25 DEG C; a mobile phase is ammonium acetate solution-acetonitrile-tetrahydrofuran; the detection wavelength is 255 nm to 275 nm, the column temperature is 20 DEG C to 30 DEG C, and isocratic elution is carried out. By adopting the method provided by the invention, various impurities such as D-CPC, 7-ADCA, N-acetyl-D-7-ACA, 7-ACA, D-7-ACA lactone, cephalosporin C and the like in the key mother nucleus of the cefcapene pivoxil hydrochloride are effectively detected, and the condition of the impurities in the key mother nucleus of the cefcapene pivoxil hydrochloride is accurately, qualitatively and quantitatively detected. Therefore, the clinical safety of the cefcapene pivoxil hydrochloride product is improved.

This application discloses a high-concentration thallium solvent extraction method for the lithium salt extraction industry, belonging to the field of hydrometallurgical technology. The method provided by this application includes the following steps: Step S1: Adding a pH adjuster to the thallium waste liquid to adjust the pH, then adding an oxidant, and stirring to react and obtain a mixed solution; the pH adjuster is HCl; Step S2: Adding an extractant and a diluent to the mixed solution, stirring to extract and separate, obtaining a thallium-containing organic phase and a first raffinate; the extractant includes N503 extractant and tributyl phosphate; Step S3: Washing the thallium-containing organic phase with hydrochloric acid solution, then adding ammonium acetate solution for back-extraction and separation, obtaining a back-extraction solution and a second raffinate. The method of this application has good selectivity, high extraction rate, low environmental pollution, low cost, and the extractant can be reused.

The application discloses a kind of solid waste-based calcium carbonate low-carbon cementing material and its preparation method and application, calcium-based solid waste and ammonium acetate solution occur leaching reaction, after reaction, calcium acetate leaching liquid is obtained by centrifugal separation;The calcium acetate leaching liquid is placed in CO2 mineralization reactor, and a dispersion control agent is added, and CO2 is introduced to carry out mineralization reaction, and the solid waste-based calcium carbonate low-carbon cementing material is obtained by centrifugal separation after reaction.The application prepares solid waste-based calcium carbonate low-carbon cementing material by the technical route of CO2 mineralization indirect mineralization with calcium-based solid waste material as raw material, makes full use of solid waste, and reduces environmental pollution caused by large-area stockpiling.Amorphous calcium carbonate is used as precursor, and the crystalline phase of amorphous calcium carbonate is converted during cement hydration, which improves the performance of cementing material.