19 results about "Carbosulfan" patented technology

The invention provides a method for visually and rapidly detecting carbosulfan pesticide by using medium-entropy nano-enzyme and application of the medium-entropy nano-enzyme, and belongs to the technical field of analytical chemistry. On the basis of a metal ligand cross-linking strategy, the medium-entropy nano-enzyme FeCeCu MEzymes is synthesized through self-assembly of the chelating ability of dopamine phenolic hydroxyl and multi-metal ions of Fe < 3 + >, Ce < 3 + > and Cu < 2 + >, and the medium-entropy nano-enzyme FeCeCu MEzymes sensor is designed to be combined with a smart phone to realize rapid visual detection of carbosulfan; the rapid and visual carbosulfan detection method provided by the invention has the advantages of rapidness, high sensitivity, good selectivity, visual detection result and the like, and is simple and easy to operate and relatively low in cost.

The invention relates to a diatomic catalyst for detecting carbosulfan pesticide residue and a preparation method, and belongs to the technical field of food safety detection. According to the invention, a reducing sulfide generated by breaking a nitrogen-sulfur (N-S) bond of carbosulfan under an acidic condition is used as a specific substance. The reductive sulfide not only can prevent bimetal active sites in the diatomic catalyst, but also consumes hydroxyl radicals generated by catalyzing hydrogen peroxide (H2O2), and the sensing switch enzyme formed by a dual enzyme inhibition mechanism causes the enzyme substrate 3, 4-dihydroxyl-3, 4-dione to be converted into the diatomic catalyst, so that the catalytic activity of the diatomic catalyst is improved. The blue color of the 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) gradually becomes light along with the increase of the concentration of carbosulfan, sensitive visual detection is implemented, and after a blue product is read by using an ultraviolet spectrophotometer, the absorbance value generated by an ultraviolet absorption spectrum at 654 nm is linearly dependent on carbosulfan. The prepared diatomic catalyst effectively improves the detection sensitivity of the carbosulfan pesticide residue, and has good popularization and application prospects.

This invention relates to a method for preparing a nanozyme detection reagent for carbofuran residues in apples, belonging to the field of pesticide residue and food safety technology. Specific steps: (1) Prepare mesoporous polydopamine powder using polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, dopamine hydrochloride, etc.; (2) Prepare a copper-manganese bimetallic carbon dot solution using citric acid, copper chloride, manganese chloride, and ethylenediamine; (3) Prepare the nanozyme detection reagent using the mesoporous polydopamine solution and the copper-manganese bimetallic carbon dot solution. Mesoporous polydopamine has a large specific surface area, providing numerous sites for carbon dot loading and effectively adsorbing carbofuran molecules. The copper-manganese bimetallic carbon dots give the nanozyme detection reagent good enzyme-like activity and generate pesticide concentration-dependent colorimetric and photothermal signals. This invention achieves mutual verification of dual-mode output signals, significantly improving detection reliability; and completes detection within 1.5 h.

The invention relates to the technical field of pesticide residue detection, in particular to a detection method for determining benfuracarb, carbosulfan and metabolites thereof, which comprises the steps of sample preparation and preservation, sample extraction, purification, standard working curve drawing and result calculation. An optimized QuEChERS pretreatment method is adopted, a citric acid buffer salt system is combined to adjust the pH value, a liquid chromatography-mass spectrometry / mass spectrometer is used for detection, and an external standard method is used for quantitative analysis. The method can effectively solve the problem that the target object is unstable under the acidic condition, simplifies the operation process, reduces the reagent consumption, is environment-friendly, enhances the detection applicability of the method in various matrixes, is suitable for rapid detection of large-batch samples, and has the characteristics of high efficiency, accuracy and environment friendliness.

This invention relates to a method for preparing a bimodal hydrogel detection reagent for carbofuran residues in cucumbers, belonging to the field of food safety testing. The bimodal hydrogel detection reagent is a hydrogel-like detection reagent synthesized by adding a copper-doped metal-organic framework to a sodium alginate-calcium carbonate hydrogel system. The bimodal hydrogel detection reagent is a three-dimensional network structure material. The detection limit of the bimodal hydrogel detection reagent for carbofuran in cucumbers is 17.59 μM in the colorimetric mode (0-250 μM) and 5.98 μM in the fluorescence mode (0-180 μM), achieving bimodal detection. This not only enables real-time on-site monitoring of carbofuran residues in cucumbers but also ensures the accuracy of the detection results through cross-validation between the two modes; the detection time is within 1.5 hours, and it exhibits good specificity for carbofuran residues in cucumbers.

This invention provides a rapid and visualized detection method for the pesticide thiocarbamate using medium-entropy nanozymes, and its application, belonging to the field of analytical chemistry. This invention is based on a metal-ligand crosslinking strategy, utilizing the chelating ability of dopamine phenolic hydroxyl groups and Fe... 3+ Ce 3+ and Cu 2+ The invention utilizes a multi-metal ion self-assembly synthesis of medium-entropy nanozymes (FeCeCu MEzymes), and designs a medium-entropy nanozyme (FeCeCu MEzymes) sensor combined with a smartphone to achieve rapid and visual detection of carbofuran. The rapid and visual detection method for carbofuran provided by this invention has the advantages of being fast, highly sensitive, selective, and providing intuitive detection results. It is also simple to operate and has a low cost.

The invention discloses a colorimetric detection method for carbosulfan based on a smartphone-assisted photoresponse nano-enzyme functionalized paper base, and the method comprises the following steps: firstly preparing a carbon quantum dot / graphite phase carbon nitride (C-dots / g-C3N4) nano-enzyme, under a visible light illumination condition, catalyzing 3, 3 ', 4', 5 '-tetramethyl-3, 4'-tetramethyl-3, 4 '-tetramethyl-3, 4'-tetramethyl-3, 4 '-tetramethyl-3, 4'-tetramethyl-3, 4 '-tetramethyl-3, 4'-tetramethyl-3, 4 '-tetramethyl-3, 4'-tetramethyl-3, 4 '-tetramethyl-3, 4 According to the invention, TMB (oxTMB) in a blue oxidation state is generated through oxidation of 3, 3 ', 5, 5'-tetramethyl benzidine (TMB), and the TMB has a strong absorption peak at 652 nm; carbosulfan is hydrolyzed under an acidic condition to generate a sulfur-containing compound, and the chromogenic reaction is inhibited, so that the absorbance of the system at 652 nm is reduced. Based on the change of the absorbance of the system at 652 nm along with the concentration of carbosulfan, the carbosulfan can be detected. The catalytic activity of the C-dots / g-C3N4 photoresponse nano-enzyme is obviously improved compared with that of g-C3N4, and guidance is provided for preparation of the g-C3N4-based photoresponse nano-enzyme with high catalytic activity. According to the method, the photoresponse nano-enzyme is adopted and can be accurately regulated and controlled by switching on and off a light source, so that the detection result is more accurate, large instruments are not needed, the operation is simple and convenient, and the phenomenon is intuitive.

The application discloses a preparation method of a rapid detection kit for metronidazole residue in rice, and belongs to the technical field of bio-agriculture. The method comprises the following steps: preparing a magnetic molecular imprinting enrichment agent, molybdenum-copper double-atom nitrogen-sulfur co-doped carbon dots, a hollow mesoporous polydopamine carrier and a colorimetric-photothermal dual-signal nanoscale enzyme reagent, and packaging the above reagents into a box together with acidolysis extraction liquid, substrate color developing liquid and standard comparison liquid. The kit can realize selective enrichment, matrix purification and colorimetric-photothermal dual-channel detection of metronidazole in rice samples, has the advantages of simple operation, rapid detection, strong anti-interference ability and high reliability of results, and is suitable for on-site rapid screening of metronidazole residues in paddy, brown rice and milled rice.

This invention discloses the use of chitosan in reducing carbofuran residues in crops. It involves exogenously applying carboxylated chitosan to crops treated with carbofuran. For hydroponically grown crops, the method of exogenously applying carboxylated chitosan is as follows: dissolve the carboxylated chitosan into a stock solution, then add it directly to the nutrient solution or dilute it to a set concentration and spray it onto the crop leaves. For soil-grown crops, the method of exogenously applying carboxylated chitosan is as follows: dissolve the carboxylated chitosan into a stock solution, dilute it to a set concentration, and then apply it directly to the crop roots or spray it onto the crop leaves. This invention discovers the effect of exogenously applying carboxylated chitosan on promoting the metabolism of carbofuran in maize, and explores the possible mechanism by which carboxylated chitosan promotes the metabolism of carbofuran in maize through transcriptome sequencing analysis, providing a reference method for the regulation of pesticide residues in plants.

The present invention relates to the technical field of pesticides, and in particular to an insecticidal composition containing isoflualanam and a use thereof. The insecticidal composition comprises active ingredient A and active ingredient B, wherein the active ingredient A is isoflualanam; and the active ingredient B is selected from one or more of the following compounds: phoxim, chlorpyrifos, triazophos, quinalphos, carbosulfan, diazinon, dichlorvos, and trichlorfon. The composition has the characteristics of reasonable formulation, good insecticidal efficacy, low application cost, reduced application amount, safety to crops, reduced pesticide residues and the like.

The invention belongs to the technical field of pesticides, and particularly relates to the technical field of pesticide compounding, in particular to a synergistic acaricidal composition. The synergistic acaricidal composition comprises an active compound (A), a compound shown in a formula Ia (formula Ia) and at least one active compound (B), and the active compound (B) is selected from the group consisting of chlorfenapyr, phoxim, dimethoate, pyridazinofos, carbosulfan, amitraz, lambda-cyhalothrin, lime sulfur, sulfur, chlorpyrifos, profenofos, lambda-cyhalothrin, triflumizone, Sulfiflumin, Spirobudifen, Mivorisaner, Modoplaner, Tigolaner, Umifoxolaner and Flupentifenox. The weight ratio of the active compound (A) to the active compound (B) is (1: 100)-(100: 1). The synergistic acaricidal composition can effectively improve the prevention and control effect on pest mites, has a remarkable synergistic effect compared with a single agent, and can effectively reduce the use amount, reduce the use cost and reduce the influence on the environment.

The invention belongs to the technical field of pesticides, and particularly relates to an insecticidal composition containing oxazosulfuron and application of the insecticidal composition. The insecticidal composition comprises an active component A and an active component B. The active component A is oxazosulfuron; and the active ingredient B is selected from one or more of the following compounds: phoxim, chlorpyrifos, triazophos, quinalphos, carbosulfan, diazinon, dichlorvos and dipterex. The composition is reasonable in component, good in insecticidal effect and low in pesticide cost, and has the characteristics that the application amount is reduced, the composition is safe to crops, the pesticide residue is reduced and the like.

The invention discloses a carbosulfan high-salinity wastewater treatment method and application thereof, and relates to the technical field of wastewater treatment. The treatment method comprises the following steps: reacting modified carbon with the carbosulfan high-salt wastewater in an ABR reaction device; the preparation method of the modified carbon comprises the following steps: performing pyrolysis, alkali washing, acid washing and aluminum salt dipping treatment on a biomass material in sequence. By means of the treatment method, the COD removal rate can be remarkably increased under the high-salt condition, degradation of furanphenol and triethylamine is promoted, and the biodegradability of wastewater is improved.

The invention discloses a triple-effect evaporation process and system for carbosulfan wastewater treatment, and the process comprises the following steps: S1, pretreatment: adding a bimetallic catalyst into to-be-treated wastewater, introducing ozone under the condition that the pH value is 3-4, adjusting the pH value to 8-10, preheating the wastewater, and enabling the wastewater to enter a three-stage flash tower; s2, triple-effect down-flow evaporation: feeding the pretreated wastewater into a triple-effect down-flow evaporation device, and concentrating to obtain a tertiary concentrated solution; s3, salt recovery: micro-nano bubbles are introduced into the third-stage concentrated solution, a composite surfactant is added, a self-emulsifying organic silicon emulsion is added for defoaming and thickening, solid-liquid separation is performed, a solid phase is collected, and a liquid phase flows back to a first-effect natural circulation evaporator; wherein the composite surfactant is prepared from hexadecyl sulphobetaine and sodium dodecyl sulfate. The process can realize the technical breakthrough that the degradation rate of toxic organic matters is greater than 99% and the operation cycle of an evaporation system is prolonged by more than 2.5 times.

The present application relates to a kind of insecticide compositions, specifically a sanitary insecticide composition and its application.The composition is component A and component B, wherein component A is a compound shown in formula I;component B is oxamyl, carbosulfan, propoxur or carbaryl;the synergistic effect of the insecticide composition of the present application is obtained at a certain ratio, and the knockdown and lethal effect are improved compared with single agent, which is suitable for preventing and treating sanitary pests such as mosquitoes, flies, fleas, ants, cockroaches, mites, wasps and bedbugs.

The present invention relates to the field of carbosulfan crude oil purification, and discloses a carbosulfan crude oil purification process, which comprises: 1, mixing raw materials, removing large particle impurities and insoluble solids through fine filtration to ensure that the crude oil is purer when entering the subsequent treatment step, and carrying out preliminary filtration; 2, feeding the crude oil into a purification device, heating to convert dissolved water in the crude oil into steam, separating free water, recovering water through a condensation system, simultaneously removing part of light impurities, and carrying out primary purification; step 3, boiling the crude oil at a relatively low temperature by reducing the pressure, separating out components with different boiling points, further removing high-boiling-point impurities and heavy polymers, and improving the purity of the crude oil; by arranging the connecting beam capable of reciprocating left and right, the heating part b, the stirring part, the vibrating strip and other parts can work cooperatively, so that the separation efficiency of water in crude oil is effectively improved.

The invention relates to an insecticidal composition, in particular to a sanitary insecticidal composition and application thereof. The composition comprises a component A and a component B, wherein the component A is a compound as shown in a formula I; the component B is bendiocarb, carbosulfan, propoxur or carbaryl; the compounded insecticide composition has a synergistic effect in a certain proportion, has improved knockdown and death effects compared with a single agent, and is suitable for preventing and treating sanitary pests such as mosquitoes, flies, fleas, ants, cockroaches, mites, wasps and bed bugs. # imgabs0 #

The invention relates to the technical field of pesticides, in particular to an insecticide composition for effectively preventing and treating cotton aphid and application. The pesticide composition comprises an active component A and an active component B, the active ingredient A is flufenacil; the active ingredient B is carbosulfan or sulfoxaflor; the mass ratio of the active component A to the active component B is 1: (2-8) or (2-8): 1. The pesticide composition with a synergistic effect in the field of cotton aphid prevention and control is obtained through research, has a remarkable higher prevention and control effect on cotton aphids when being compounded according to a specific proportion, is suitable for cotton aphid prevention and control of various cotton aphid harmful plants, has the characteristics of high efficiency, low toxicity and sustainability, and has an important application value.

The invention provides a composition containing carbosulfan, clothianidin and fludioxonil and application of the composition. The composition is prepared from carbosulfan, clothianidin and fludioxonil which serve as effective components. The effective components in the pesticide composition disclosed by the invention have a relatively good synergistic effect, and the pesticide composition has a very good application prospect.