35 results about "Roxarsone" patented technology

The invention provides a determination method for arsanilic acid, nitarsone and roxarsone in an animal foodstuff. The invention is characterized in that the determination method comprises the following steps: weighing A g of a to-be-determined sample, placing the sample in a mortar, adding 3A g of Florisil, carrying out full mixing with stirring, using an accelerated solvent extraction instrument for extraction, wherein an aqueous methanol solution with a volume ratio of methanol to water of 3: 7 is used as an extraction solvent, and allowing a constant volume of 5A ml to be obtained through addition of water after completion of extraction; and carrying out filtering with a filter membrane and carrying out determination by using liquid chromatography-atomic fluorescence spectroscopy; wherein A is an integer not equal to zero. Compared with the prior art, the invention has the following advantages: the method for simultaneous determination of residual quantities of arsanilic acid, nitarsone and roxarsone in animal derived food by using accelerated solvent extraction-liquid chromatography-atomic fluorescence spectroscopy is researched and established in embodiments in the invention; the proportion of the extraction solvent, extraction temperature, extraction time and extraction frequency of accelerated solvent extraction technology are optimized, and the advantages of a small usage amount of the extraction solvent, rapidness, small influence on a matrix, high extraction efficiency and good selectivity are obtained.

The invention discloses swine eperythrozoonosis-resisting compound long-acting oxytetracycline injection, which comprises the following components in part by mass: oxytetracycline hydrochloride (or alkaloids thereof), roxarsone, acetaminophen, glycerol formal, polyvinylpyrrolidone K12, polyvinylpyrrolidone K17, polyethylene glycol 200, polyethylene glycol 400, magnesium chloride, sodium formaldehyde sulphoxylate, monoethanol amine and water for injection. Due to the compatibility of the oxytetracycline hydrochloride (or the alkaloids thereof), the roxarsone and the acetaminophen and synergistic action of each medicament component, the injection treats both symptoms and root causes of swine eperythrozoonosis so as to fulfill the aim of quick and effective treatment.

The invention belongs to the technical field of material chemistry, and discloses a molecular imprinting polymer for roxarsone detection, and a preparation method thereof. The molecular imprinting polymer preparation method comprises the following steps: carrying out polymerization of a template, a pore forming agent, a functional monomer, a cross-linking agent and an initiator for 8-48 h at a temperature of 50-80 DEG C, and removing the template to obtain the molecular imprinting polymer for roxarsone detection. According to the present invention, a roxarsone recovery rate of the prepared molecular imprinting polymer is more than 90%, and the prepared molecular imprinting polymer shows a high roxarsone cross reaction, has high selectivity and high specificity, and provides broad application prospects in the field of application of the prepared molecular imprinting polymer as a sample purification pretreatment material for roxarsone analysis in feeds, animal tissues, environment water and other matrixes.

The invention discloses a method for removing organic arsenic in cultivation wastewater by anaerobic granular sludge, which comprises the steps of: intensifying the anaerobic granular sludge by FeSO4; feeding roxarsone or arsanilic acid-containing cultivation wastewater into the intensified anaerobic granular sludge; controlling the temperature in an arsenic reactor at 25-35DEG C, the hydraulic retention time for 12-60h, and the PH value of solution in the reactor at 6.0-8.0; and running a rector till that the concentration of roxarsone or arsanilic acid in the water discharged out of the reactor is reduced to be less than 50mug/L so as to obtain the acclimatized anaerobic granular sludge. The organic arsenic-containing cultivation wastewater is treated by the acclimatized anaerobic granular sludge, so that the method is high in organic arsenic removing efficiency, and the arsenic content in the discharged water achieves the discharge standard. The method has the advantages of being wide in raw material sources, simple in preparation, and low in cost.

The invention relates to an organic arsenic feed additive discharge pre-alarming monitoring method in a water environment system, belonging to the environmental monitoring technical field, comprising the following steps: preparing tetrahymena culture medium; preparing arsanilic acid standard sample solution/roxarsone standard sample solution; collecting the actual water sample and separating and extracting the organic arsenic feed additive compound; inoculating the tetrahymena into the prepared culture medium and then subpackaged the inoculated culture medium into the sample culture tubes; respectively adding the organic arsenic feed additive standard solution into the sample culture tubes and respectively measuring the corresponding tetrahymena cell density using absorptometry; making the actual water sample intervening the corresponding tetrahymena biological model and analyzing and determining the corresponding tetrahymena cell density; based on the comparison of the tetrahymena cell density and the contrast of the corresponding tetrahymena cell density after the actual water sample intervention, to obtain the concentration range of the pollutant presence, thereby pre-alarming the discharge condition of the organic arsenic feed additive in the corresponding actual water environment.

The invention discloses a method for treating low-roxarsone waste water by efficient adsorption treatment, belonging to the field of a sewage disposal technology. The method comprises the steps of 1, preparing polyacrylic acid iron (II) complex suspended adsorbent; 2, pretreating the low- roxarsone waste water, and removing the suspended solid out of the waste water; 3, adding the polyacrylic acid iron (II) complex suspended adsorbent into the waste water pretreated in the step 2, wherein the content of the added polyacrylic acid iron (II) complex suspended adsorbent in the waste water obtained by the pretreatment is 0.5-3.0g/ L; 4, adjusting the pH range of an adsorption system obtained in the step 3 to be 6-9, stirring for 60-120min for adsorption, standing still for 30-60min for precipitation, and then carrying out solid-liquid separation. The method can be used for efficiently treating the low-roxarsone waste water with low energy consumption, is convenient to operate and easy to control, and is hardly influenced by the salt content in the waste water.

The invention discloses a photocatalytic degradation agent for roxarsone pollution of a water body. The photocatalytic degradation agent is composed of sulfite and hematite. The invention further discloses a photocatalytic degradation method for the roxarsone pollution of the water body. The photocatalytic degradation method comprises the following steps: adding the degradation agent into a waterbody polluted by roxarsone and then adjusting the pH (Potential of Hydrogen) of the water body to be 4 to 8; and finally, introducing fresh air into the water body and carrying out illumination treatment. The photocatalytic degradation agent disclosed by the invention has the advantages of high degradation efficiency, short time, capability of utilizing sunlight, capability of repeatedly utilizinga hematite material for a plurality of times and the like; and the method has the advantages of simplicity in operation, wide material source, low cost, no generation of toxic and harmful byproductsand environment friendliness, and has a wide prospect in application of treating organic polluted wastewater containing the roxarsone.

The invention discloses a pig feeding environment-protection and compound premixing feed and a processing method, solving the problems in pig raising such as disease prevention, weight gain, residue and reduction of harmful substance discharging with the new formula, which adopts the technical proposal that the formula comprises more than thirty substances such as pig feeding multi-fiber substance, 25% copper sulfate, 15% bioplex iron, 34% zinc sulfate, 15% bioplex zinc, 2% calcium iodate, 1% sodium selenite, 2% cobalt chloride, lysine, roxarsone, gill fertilizer 500, 50% choline chloride, mino 1082, pouliquen, spray-drying egg powder, phytase, acidifier, salt, rice husk powder, stone powder, dicalcium phosphate, zeolite powder, and 33% ethoxyquin. The feed is suitable for pig raising.

The invention discloses a preparation method of an iron-manganese oxide/starch/biochar composite material for simultaneously adsorbing inorganic arsenic and organic arsenic in a water body. The preparation method comprises the following steps: adding corn starch and biochar into FeSO4 and MnSO4 solutions, adding a KMnO4 solution under magnetic stirring, adjusting the pH value to 2.0 with NaOH, aging the solution, and filtering and drying the solution to obtain the ferro-manganese oxide/starch/biochar composite material. Due to the addition of the starch and the biochar, the synthesized ferro-manganese oxide particles are uniformly dispersed and uniform in particle size, and the particle size range is 300nm-600nm, so that the adsorption capacity of the composite material on trivalent arsenic, pentavalent arsenic and roxarsone is remarkably increased. The surface active adsorption site of the material is a FeOH group, and the Fe-OH group and an arsenic compound can form an inner sphere Fe-O-As compound. The preparation process is simple, the cost is low, the used raw materials are low-carbon and environment-friendly, and various forms of arsenic in the water body can be adsorbed at the same time.

The invention, which belongs to the technical field of food detection, discloses a method for detecting roxarsone and eight metabolites of the roxarsone in an animal body. Roxarsone and eight metabolites of the roxarsone in all tissues of livestock are measured by combining microwave-assisted extraction with high performance liquid chromatography-hydride generation-atomic fluorescence spectrometryjointly. With the disclosed method, the contents of roxarsone and possible eight metabolites of the roxarsone in all tissues of livestock can be effectively separated and measured and thus the content of the arsenic form in each tissue of the livestock can be accurately analyzed, thereby providing a reliable target for supervision on illegal use of the roxarsone in an animal production link and ensuring the animal foodstuff safety. Therefore, the method has the important significance in evaluating human health risks.

The invention discloses a detection method for arsanilic acid, nitrobenzene arsenic acid and roxarsone in an egg, and particularly relates to the field of residual detection. The detection method particularly comprises the following steps that step one, egg white and yolk of an egg and a mixed egg white and yolk solution are respectively placed in test tubes, then mixing operation is conducted onthe test tubes by adopting a homogenizer, and 2 g of a homogenized mixed sample is weighed and poured into 18-22 ml of an aqueous methyl alcohol solution; the mixture is placed in a microwave-assistedextraction device for extraction for 20-30 minutes. According to the detection method, by extracting the egg white and egg yolk of the egg and putting the egg white and egg yolk of the egg and the mixed egg white and egg yolk solution into the test tubes, detection for the arsanilic acid, nitrobenzene arsenic acid and roxarsone in the egg white and egg yolk in the egg and the mixed egg white andegg yolk solution is effectively improved, a dual-detection mode is adopted for a contrast, the precision of detection for the arsanilic acid, the nitrobenzene arsenic acid and the roxarsone is effectively improved, the detection quality is improved, and the contrast ratio is increased.

The invention discloses a method used for detecting Roxarsone and degradation products of Roxarsone in broiler manure. The method comprises following steps: 1) methanol/water is taken as an extracting solution to extract manure samples; 2) a solid phase extraction column is used for further concentration and purification of the samples; and 3) a high performance liquid chromatography-ion trap-time of flight mass spectrometer is used for analysis. According to the method, a pretreatment method of the manure samples is optimized firstly, and the recovery rate of Roxarsone and the degradation products of Roxarsone in broiler manure of the method is capable of satisfying requirements of subsequent detection. The ion trap-time of flight mass spectrometer is used for detecting the samples obtained via pretreatment, accurate mass resolution ratio and sensitivity are improved greatly compared with that of other mass spectrum methods, molecule mass information can be provided accurately, reliability of determined molecular formulas is improved, and the method is useful in identification of organic compounds.

The invention discloses a method for separating roxarsone and its degradation product in broiler manure. The method comprises 1, carrying out extraction on a manure sample through a methanol-water extraction agent, 2, condensing and purifying the sample through a solid phase extraction column and 3, determining a roxarsone recovery rate of the manure sample through an external standard method. The separation method utilizes the methanol-water extraction agent with a methanol-water volume ratio of 1: 9 to extract roxarsone residues in the manure sample and has a high recovery rate. When the sample is further purified through a solid phase extraction column, a formic acid-methanol-water agent with a formic acid-methanol-water volume ratio of 5: 65-75: 20-30 is used and an eluant with pH of 2 is used so that an ideal recovery rate is guaranteed and polar compound impurities in the sample can be removed and thus background interference in mass spectrum detection is reduced. The recovery rate of the separation method satisfies later detection requirements.

The invention discloses a method for extracting 3-nitryl-4--hydroxyphenylarsonic acid from waste water comprising Roxarsone: the waste water comprising Roxarsone is mixed with an organic solvent A for extracting under 25-75 DEG C under the effect of an extracting agent A to obtain a primary water course, a primary organic solvent course and a primary extracting agent course. The primary extracting agent course is added into aqueous alkali A and water A and stirred to adjust a pH value to 8-14 and then stewed for delamination to obtain a final water course and a final extracting agent course; the pH value of the final water course is adjusted to 0.5-2 and then the final water course is crystallized under 30-75 DEG C, and filtered after the final water course is completely crystallized to obtain filter liquor and filter cake; and the filter cake is dried to obtain the 3-nitryl-4--hydroxyphenylarsonic acid. The method is simple to operate and has less equipment investment and low energy consumption. The solvent and extracting agent used can be recycled and reused and have less loss; therefore, the material input is low. Moreover, not wastes are generated; therefore, the method is clean and environmental friendly.

The invention discloses an anaerobic membrane bioreactor for treating livestock and poultry wastewater containing high-concentration roxarsone, and belongs to the technical field of sewage treatment.The anaerobic membrane bioreactor is characterized in that simulated livestock and poultry wastewater containing low-concentration roxarsone to high-concentration roxarsone is gradually used for domesticating the reactor, anaerobic flora resistant to roxarsone is screened and cultivated, and the anaerobic flora resistant to roxarsone is obtained; under the condition of high-concentration roxarsone, stable and efficient removal of COD and rapid conversion of roxarsone are realized, and meanwhile, methane-rich biogas can be generated for recycling. The reactor disclosed by the invention can stably run for a long time, and solves the problems of poor effluent quality, serious sludge loss, low roxarsone conversion efficiency and the like when the livestock and poultry wastewater containing high-concentration roxarsone is treated by an existing anaerobic biological treatment method.

The invention discloses a method for rapidly detecting arsanilic acid and roxarsone in water sample. The method comprises the following specific steps of: firstly taking three aliquots of identical water samples, respectively adjusting the pH values of the two aliquots of water samples to be strongly acidic or strongly alkali, then pouring the two aliquots of water samples with adjusted pH values into a quartz reactor, leading into inert gas for removing oxygen, switching on an ultraviolet disinfection lamp for irradiation so as to convert organic selenium into inorganic selenium; and after the reaction is finished, detecting inorganic selenium contained in the three aliquots of water samples by adopting an atomic fluorescence spectroscopy, and respectively obtain background value of inorganic selenium, content of arsanilic acid and content of roxarsone in the water samples. The method is simple to operate, good in repeatability, and high in selectivity, the detection limit of the organic selenium can be greatly reduced, the detection precision can be improved, and the detection capability of a laboratory can be effectively promoted; in addition, chemical reagents are common reagents, so that the cost is low, the use amount is small, and the induced secondary pollution is small.

The invention discloses a novel catalysis-adsorption material as well as a preparation method and an application thereof. The preparation method comprises the following steps: adding gamma-Al2O3 intoa Fe <3+> ion solution, introducing inert gas, uniformly stirring, adding a NaBH4 solution, reducing Fe<3+> into nano zero-valent iron, washing and drying to obtain the novel catalytic-adsorption material. According to the preparation method disclosed by the invention, the nZVI is uniformly attached to the surface of the activated aluminum oxide and in a pore structure of the activated aluminum oxide, so that the nZVI is in a stable high-surface-energy state, heavy metals are adsorbed and removed while organic matters are catalytically oxidized, and the adsorption capacity for arsenate is 223mg/g; when the concentration of roxarsone is lower than 100 mg/L, the removal rates of TOC and arsenic are both as high as 99.9%, the emission concentration of arsenic in the final solution is lower than 40 ppb in the environment, and the material further has the magnetism of zero-valent iron, is easy to separate from the reaction solution, high in treatment efficiency and low in production cost and does not cause secondary pollution to the environment.

The invention provides a method for effectively treating an organic arsenic compound, namely Roxarsone (ROX), which comprises the following steps: placing a specific loading amount of ferroferric oxide loaded resorcinol-formaldehyde resin in a photocatalytic tube, adding an ROX solution, adjusting the pH value of a mixed solution to be less than 3, continuously stirring the mixed solution under a dark condition to achieve adsorption-desorption balance, and carrying out adsorption-desorption treatment on the mixed solution to obtain the Roxarsone. The method is characterized in that Fe3O4 is loaded with resorcinol-formaldehyde resin, a lamp is turned on for irradiation, ROX is degraded, the Fe3O4 loaded resorcinol-formaldehyde resin is prepared by dispersing resorcinol-formaldehyde resin, crystalline ferric chloride hexahydrate and sodium acetate into ethylene glycol containing CTAB according to the ratio of 100: 120.75: 696.6 for a hydrothermal reaction, and the removal rate of Roxarsone (ROX) within 2 h reaches 75%.