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7291 results about "Pesticide residue" patented technology

Pesticide residue refers to the pesticides that may remain on or in food after they are applied to food crops. The maximum allowable levels of these residues in foods are often stipulated by regulatory bodies in many countries. Regulations such as pre-harvest intervals also often prevent harvest of crop or livestock products if recently treated in order to allow residue concentrations to decrease over time to safe levels before harvest. Exposure of the general population to these residues most commonly occurs through consumption of treated food sources, or being in close contact to areas treated with pesticides such as farms or lawns.

Hot pepper and determining method for 96 pesticide residues in product of hot pepper

The invention discloses hot pepper and a determining method for 96 pesticide residues in a product of the hot pepper. The determining method comprises the following steps: homogenously extracting residual pesticide in a sample with 1% acetic acid-acetonitrile solution, purifying the extracting solution with a Florisil solid phase extraction column, dispersing and purifying the extracting solution with ethylenediamine-N-propyl silane (PSA) and octadecyl silane bonded phase (C18) substrate, detecting 69 pesticide residuals in the purified concentrated liquid of the Florisil column by GC-MS (gaschromatographic mass spectrometry), detecting 27 pesticide residuals in the substrate dispersed purified liquid by liquid chromatography-tandem mass spectrometry (LC-MS / MS), using the black substrate solution dilution standard to construct the updated calibration curves, adopting an internal standard method to quantify when using GC / MS to detect the residuals, and adopting an external standard method to quantify when using LC-MS / MS to detect the residuals. The average recovery rate of the method is 70.7-118.6%; the average relative standard deviation (RSD) is 3.2-11.4%; the detection limit is 0.13-28.2 ug / kg. The determining method has the advantages of simplicity and convenience in operation, high speed, accuracy, high sensitivity and good repeatability.

Compound microbial agent for degrading antibiotic and pesticide residues as well as preparation and application thereof

The invention relates to a compound microbial agent for degrading antibiotic and pesticide residues as well as preparation and application thereof, and belongs to the field of biotechnology and environmental protection. Multi-thallus compound microbial powder is prepared from the compound microbial agent according to the weight percentage of living microbes to the total amount of compound microbial powder as follows: 10%-15% of bacillus subtilis, 10%-15% of aspergillus niger, 10%-15% of bacillus mucilaginosus, 10%-15% of enterococcus faecalis, 8%-12% of bacillus licheniformis, 8%-12% of bacillus megaterium, 8%-12% of pseudomonas fluorescens, 5%-8% of lactobacillus plantarum, 5%-8% of bacillus polymyxin and 6%-8% of streptococcus thermophiles. The compound microbial agent has the effects of degrading antibiotic and pesticide residues, fermenting and composting organic matter, acting as functional fertilizer and repairing the environment, and can solve the problems of secondary pollution caused by antibiotic residues in culture feces and resource utilization of organic waste and realizes biodegradation of the antibiotic and pesticide residues in soil when applied to the agricultural ecological environment, thereby being of great value and practical significance in restoration of agricultural ecological environment and protection of human health.

GPS-based unmanned aerial vehicle pesticide spraying device and method

The invention discloses a GPS-based unmanned aerial vehicle pesticide spraying device. The GPS-based unmanned aerial vehicle pesticide spraying device comprises a vehicle body, a pesticide storage box and a sprayer, and further comprises a central control module and a GPS signal receiver, wherein the pesticide storage box is installed on the vehicle body, the sprayer is connected with the pesticide storage box, the central control module stores an operation prescription map, and the GPS signal receiver determines the position of an unmanned aerial vehicle, and transmits a signal of the position of the unmanned aerial vehicle to the central control module. The central control module obtains pesticide spraying information at the position of the unmanned aerial vehicle according to the operation prescription map and controls the sprayer to conduct pesticide spraying. The invention further discloses a GPS-based unmanned aerial vehicle pesticide spraying method. According to the GPS-based unmanned aerial vehicle pesticide spraying device and method, the pesticide spraying amount can be changed according to different varieties, different densities and other parameters of crops inside the pesticide spraying area, so that waste of liquid pesticide is reduced, the pesticide spraying accuracy is improved, the disinsection effect can be ensured, the pesticide residues can be well reduced, and the quality of agricultural products is improved.

Traditional Chinese medicine organic fertilizer

The invention discloses traditional Chinese medicine organic fertilizer. The traditional Chinese medicine organic fertilizer comprises sweet wormwood herb, green Chinese onion, sophora flavescens, yellow soybean, salvia miltiorrhiza, perilla stem, castor root or castor leaf, salvinia natans, onion, peach leaf, camphor, tripterygium wilfordii, agaric, pine needle, plantain seed, lime, honeysuckle, frankincense, Chinaberry bark, Chinese yam, potash, carrot leaf, radish leaf, poria cocos, pyrethrum, belvedere fruit, pseudo-ginseng, negundo chastetree fruit, mulberry leaf, hot pepper leaf, ginger leaf, phoenix tree flower, tobacco, pepper and suberect spatholobus stem. The fertilizer can improve the soil structure, so that the soil is abundant in organic matters and soil hardening caused by excessive using amount of chemical fertilizer is avoided; a good effect of increasing yield is achieved; the fertilizer can expel, kill and prevent insects, reduces the using amount of pesticide or does not use the pesticide, contributes to environmental protection, and reduces the pesticide residue of agricultural products or has no pesticide residue in the agricultural products; the fertilizer can inhibit generation and growth of harmful germs and reduce the number of the harmful germs so as to reduce the morbidity of crops and solve the problem of continuous cropping; and the cost is low.

Process for extracting tea polyphenol, theanine, tea polysaccharide and tea pigment from tea

The invention discloses an extracting polyphenol, theanine, tea polysaccharide and tea pigment method from tea, which is characterized by the following: using deionized water for lixiviating tea at constant temperature with continuous flow upstream at multi-speed; adopting microstrainer to dislodge the foreign matter of raffinate; using hyperfiltration for putting-off pectin and protein; concentrating by hyperfiltration and dehydration; extracting tea polyphenol by acetic acid ethyl ester and recovering dissolvant; stripping caffeine of extracting extract phase, pesticide residue and dissolvant by CO2 supercritical fluid; getting tea polyphenol by low-temperature nitrogen spray-drying; using alcohol separation and low temperation vacuum drying by hyperfiltration trapped fluid to prepare tea polysaccharide; separating alcohol recrystallization by basic copper carbonate and hydrogen sulfide to get theanine; using enzymatic oxidation and alkaline air to oxygenate remain polyphenols substance of liquid phantom; getting tea pigment by hyperfiltration dehydration compression and vacuum drying; merging caffeine form carbon dioxide above-critical fluid and caffeine from carrene; recovering dissolvent; using deionized water for washing; obtaining caffeine by recrystallization vacuum drying.

Test paper reading method and test paper reading device

The invention provides a test paper reading method and a test paper reading device, which can read dry chemical test paper strips, colloidal gold immunochromatograohic assay test paper strips/cards and rapid pesticide residue test cards, are easy to operate, need no extra detection instrument and equipment, can automatically judge and read the detection result by only acquiring corresponding developing pictures through electronic equipment such as computers or mobile phones, have reliable testing accuracy and are particularly suitable for personal and household wide application. The method comprises the following steps: A. acquiring images; B. processing the acquired images; C. performing negative and positive discrimination; and D. performing concentration conversion on a sample which is discriminated to be positive in the step C through a concentration-gray scale relation to obtain a concentration value of the to-be-tested paper card/strip. The device comprises a shell and a built-in standard gray scale strip, wherein the shell is provided with a standard gray scale strip display window and is also provided with a first card slot, a second card slot and a third card slot for arranging the colloidal gold card, the rapid pesticide residue test card and the dry chemical test paper respectively.

Method for simultaneously determining one hundred pesticide residuals in traditional Chinese medicine through ultrahigh performance liquid chromatography-tandem quadrupole mass spectrum

The invention provides a method for simultaneously determining one hundred pesticide residuals in a traditional Chinese medicine through ultrahigh performance liquid chromatography-tandem quadrupole mass spectrum. The method comprises the following steps: immersing traditional Chinese medicine powder with ultrapure water, extracting with acetonitrile containing 0.1% acetic acid through a homogenate method, carrying out solid phase dispersing purification with N-propylethylenediamine and graphitized carbon, detecting in a timesharing multi-reaction monitoring mode through the ultrahigh performance liquid chromatography-tandem quadrupole mass spectrum, and quantifying with an external standard curve method. 88% of pesticides have good linear relations in a range of 5-500ng/mL, correlation coefficients are above 0.99, and the correlation coefficients of above 98% of the pesticides are above 0.97; the average recovery rate of the pesticides with the low concentration of 10mug/kg, the middle concentration of 50mug/kg and the high concentration of 100mug/kg is 70-130%, and the relative standard deviation is less than 0.15; and the detection limit is equal to or less than 0.01mg/kg, so routine detection requirements can be completely satisfied. The method has the advantages of strong versatility, good selectivity, high sensitivity, and rapidness and simplicity.

Cultivation method of good-quality high-yield Platycodon grandiflorum

The invention relates to a cultivation method of good-quality high-yield Platycodon grandiflorum. The cultivation method comprises the steps of selecting a suitable field, seeding scientifically, transplanting reasonably, managing the field reasonably, controlling pests, harvesting, processing, and reversing seed stocks scientifically. A suite of measures of soaking seed through Chinese herb medicine liquid, cultivating seedlings in summer, transplanting in winter, cutting the seedlings in early summer and the like are adopted, quality of the Platycodon grandiflorum is improved, a commodity stripe selection rate is improved, a yield is increased, and economic benefits are improved. During fertilization, organic fertilizer is adopted as main fertilizer, Chinese herb medicine fertilizer is added at the same time, and the cultivation method is green and environment-friendly. In pest control, pesticide with low concentration and little toxicity is adopted, Chinese herb medicine agents are matched simultaneously, pesticide residue is lowered effectively, content of heavy metal of obtained Platycodon grandiflorum finished products is lowered by more than 50% compared with a conventional method, good demonstration effect is achieved, and the cultivation method passes good agriculture practice (GAP) authentication of the national certification and accreditation administration.

Black garlic, process and device for fermenting same

The invention discloses black garlic, a process and a device for fermenting the same, which overcomes technical defects of the prior product, processing method and processing device. The black garlic is integral in bulk, dry in outer peel and easy to peel. Garlic cloves are in preserved fruit paste shape, are free from pungent taste, have jelly taste, taste good and are easy to preserve. Every 100 grams of ripening black garlic contains 140 milligrams of isoleucine, 250 milligrams of leucine, 170 milligrams of lysine, 160 milligrams of cystine, S-allyl cysteine and polyphenol of which the content is 22 times that of raw garlic, 36 milligrams of sodium, 930 milligrams of potassium, 52 milligrams of magnesium and 13 milligrams of calcium. The black garlic has the advantages of low heavy-metal content, no pesticide residue and no additive. The fermenting process comprises the steps of taking integral garlic as raw material, initially washing the raw material with clear water, soaking the raw material in brine, placing the raw material in a tray, fermenting, steaming and baking the raw material, performing aging treatment, sterilizing and disinfecting the obtained product, and packing the obtained product in vacuum or with nitrogen. The fermenting process has the advantages of adopting mineral water vapor and discharging air in the whole process, along with few links and low cost. The fermenting device is heated by a steam boiler, has a humidifying vapor pipe, and uses all-wooden fermentation frame and a container.

Centrifugal micro-fluidic chip for detecting pesticide residue and preparation method thereof

The invention relates to a centrifugal micro-fluidic chip for detecting pesticide residue and a preparation method thereof. The centrifugal micro-fluidic chip for detecting the pesticide residue is a disk type chip with a micro structure and a micro channel and consists of multiple layers of chips; the mixing, extracting, reacting, separating and developing process of a sample to be measured and a reagent is realized under the drive of a centrifugal force generated by rotating a centrifugal machine; and finally, the content of the pesticide residue in the sample is quantitatively detected by using an ultraviolet visible light spectrophotometer. The centrifugal micro-fluidic chip for detecting the pesticide residue can be used for directly sampling without pretreating the sample; the consumption of the sample and the reagent is low; a plurality of samples can be simultaneously treated and detected in parallel, and thus the integration, the micromation and the automation of the pesticide residue detection are realized; and the centrifugal micro-fluidic chip has the characteristics of economy, quickness and portability and provides a brand-new analysis technology for quickly detecting the pesticide residue of water bodies, foods and soil.

Water catalyst sterilizing and detoxifying device and producing and using method thereof

The invention discloses a water catalyst sterilizing and detoxifying device and a producing and using method thereof. The device comprises a water catalyst generator and a DC (direct current) power supply, wherein the water catalyst generator comprises an anode electrode and a cathode electrode which are both titanium electrodes; and the anode electrode is coated with a composite material coating. The producing method comprises the following steps of: (I) making electrodes; and (II) making the composite material coating: preparing composite material coating liquid, and brushing, drying and sintering the coating liquid in multiple times. The using method comprises the following steps of: a, placing the cleaned article and the water catalyst generator in the cleaning water; b, connecting the water catalyst generator with the DC power supply; and c, purifying the cleaned article with the water catalyst generator and the cleaning water. According to the invention, the design is reasonable, the producing and using processes are simple, and the purifying effect is good; and moreover, the problems of poor using effect, possible new pollution, easy damage to the nutrient components of thecleaned food and the like of the existing sterilizing and pesticide residue removing methods can be solved.

Full-automatic and high-throughput micro-fluidic chip system and method for detecting pesticide residue

InactiveCN104502617AAvoid preparation workQuick checkMaterial analysisEnzyme inhibitionPesticide residue
The invention provides a full-automatic and high-throughput micro-fluidic chip system and method for detecting pesticide residue, used for field detection of pesticide residue based on enzyme inhibition reaction. The full-automatic and high-throughput micro-fluidic chip system is mainly composed of a portable analytical detector and a disposable micro-fluidic chip; the plastic polymer material of the micro-fluidic chip is manufactured through existing micro-machining technology; the micro-fluidic chip is composed of a central clamping groove, an extraction chamber, a sample chamber, a reaction chamber, a detection chamber, a micro-groove, a micro-hole and a quality control bar code; reagents (comprising an extracting solution, enzyme, a colour developing agent and the like) required for detecting pesticide residue are fixed in the micro-fluidic chip; the functions of sampling automatically and quantitatively, distributing a fluid, carrying out biochemical reaction and molecular recognition and the like can be realized; a fluid operation and control module, a photoelectric detection module, a data analyzing and processing module and an information storage and communication module are integrated in the portable analytical detector; operation and control of biochemical reaction in the micro-fluidic chip and rapid analysis and detection of to-be-detected indexes and pesticide residue can be realized; and thus, the micro-fluidic chip system and the method provided by the invention are particularly applied to full-automatic and high-throughput detecting and screening of pesticide residue in the samples, such as fruits, vegetables, soil and water.

Method for preparing pesticide-removing fruit and vegetable cleaning agent based on shell powder

The invention belongs to the field of detergent compositions, and provides a method for preparing a pesticide-removing fruit and vegetable cleaning agent based on shell powder. The pesticide-removing fruit and vegetable cleaning agent is prepared from natural shell powder as a main raw material, and a natural adjuvant by the steps of preparation of micro/nano shell powder and addition of the natural adjuvant. The pesticide-removing fruit and vegetable cleaning agent is capable of effectively adsorbing and removing harmful residue matters such as pesticides and chemical fertilizers in the fruits and vegetables, not changing the properties of foods, and prolonging the quality guarantee period, and is safe, non-toxic, degradable, and suitable for cleaning of various fruits and vegetables; and the fruits and vegetables can be directly eaten after being cleaned. The pesticide-removing fruit and vegetable cleaning agent has good adsorptive property, bactericidal performance and the like, can play a good adsorption role in pesticide residues on the surfaces of the fruits and vegetables, is free of harm to a human body and the environment, and is capable of overcoming the defects of an existing cleaning agent in the aspects of non-degradation and chemical synthetic substance residue on the surfaces of the fruits and vegetables.

Method for simultaneously detecting multi-kind pesticide residues in bee products

InactiveCN101358953ASolve the problem of matrix effectFast wayComponent separationRetention timePhosphate
The present invention relates to a method of simultaneously detecting a plurality of agro-veterinary drug residues in bee products. The extracted liquid trichloroacetic acid or perchloric acid and the extracted liquid acetate, phosphate or borate solution are added into a sample; the pH value is controlled between 4.5 and 9.0; the mixed solution is centrifuged, the filtrate is added into a solid phase extraction column to be extracted, the extraction column is eluted and dried, the column is washed by oxalic acid-methanol solution, the volume of the eluent is defined by the aqueous solution of methanol, the eluent is added into liquid chromatography-tandem mass spectrometry to be analyzed and tested, the acquired chromatographic peak is contrasted with the known standard chromatographic peak of the drug, and according to the retention time and the abundance of the mass spectrum ions, the specific name of the detected drug is determined. The method only requires one pre-treatment of the sample, and thus can simultaneously extract 11 classes and more than 60 kinds of veterinary drug residues, such as sulfonamides, quinolones, macrolides, lincomycins, nitroimidazoles, beta-lactams, tetracyclines, chloromycetins, trinethoprims, chlordimeform, triadimenol and the like, the efficiency of analysis is high, and the detection cost is greatly reduced.

No-pollution standardized high-yield method for cultivating guava

The invention discloses a no-pollution standardized high-yield method for cultivating guava, which comprises the steps of field selection, orchard establishment, pruning of guava plants, solid manure management, water management, pest control, and flower and fruit management, wherein in the plant pruning, the plant is pruned into a short-trunk multi-bough round head shape so as to culture a stunting crown; in the solid manure management, basic manure and supplementary fertilizer are combined, wherein the basic manure is applied by combining deep tillage after harvesting in spring, the supplementary organic fertilizer is applied in time after fruit setting, and trace elements are supplemented by spraying fertilizer on the foliage; in the water management, weeds are covered within the range of crown to preserve moisture, and the water-saving irrigation system combining spray irrigation and trickle irrigation is utilized; in the pest control, the comprehensive agricultural measures are utilized to cooperate with spraying of high-efficiency low-toxicity low-residual pesticide, orchard management in winter and spring is actively developed, and physical pesticide control technology is popularized; and in the flower and fruit management, flower thinning and fruit thinning are carried out according to the tree vigor and nutritional status, and the fruits in the whole orchard are filled in bags. The invention has the characteristics of low pesticide residue, high fruit quality and low environmental pollution.

Study and application of quantum dot molecular imprinting microsphere quartz fluorescent sensor for detecting trace multicomponent food additives quickly on site

The invention discloses a quantum dot molecular imprinting microsphere quartz fluorescent sensor for detecting multicomponent food additives simultaneously and a method for detecting the food additives by the quantum dot molecular imprinting microsphere quartz fluorescent sensor. A method for preparing a quantum dot molecular imprinting microsphere comb quartz plate comprises the following steps of: selecting functional monomers corresponding to the food additives; preparing quantum dots and preparing quantum dot molecular imprinting microspheres according to the literature; and modifying thesurfaces of different probes of the comb quartz plate with the imprinting microspheres of different food additives by utilizing layer-upon-layer accumulated surface modification technology. The method for detecting the trace multicomponent food additives simultaneously (which is shown as the figure) comprises the following steps of: immersing the modified quartz plate into simply-pulpified food solution, arranging the quartz plate on a sealing quartz vessel, and detecting the food additives in a sample. The quantum dot molecular imprinting microsphere quartz fluorescent sensor has high specificity and sensitivity, short detection time and low cost; and in a method for detecting pesticide residues by fluorescent light, the operation is simple and quick, and reactions and results are completed and recorded automatically by instruments.

Food purifying machine

The invention provides a food purifying machine relating to the technical field of food cleaning devices. The food purifying machine comprises a rack part, a control part, a water catalyst device and an air pump device; one side of a cleaning tank is provided with a filter tank; a filter screen is arranged between the cleaning tank and the filter tank; the water inlet of the rack is communicated with a current equalizer; a water inlet pipeline is provided with an electromagnetic valve and a water level valve; the bottom of the cleaning tank is provided with a water discharge port; a man-machine interface plate is fixed on the rack; the air inlet of the air pump is provided with an air pump filter; the air outlet of the air pump is communicated with a jet pipe group at the bottom of the cleaning tank through a pipeline; the jet pipe group is provided with a plurality of jet pipe holes; a filter pipe is arranged in the filter tank of the cleaning tank and is communicated with the water inlet of a magnetic pump through a pipeline; the water outlet of the magnetic pump is communicated with the current equalizer through a pipeline; the current equalizer and a water catalyst generator are arranged in a box-shaped chamber; and the box-shaped chamber is communicated with the cleaning tank. The food purifying machine has the effects of disinfection, sterilization and pesticide residue removal, and is used for food purification.
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