64results about How to "Overcome operational complexity" patented technology

The invention discloses an ultralow concentration electrochemical formaldehyde sensor which can detect low concentration of 10 ppb, and comprises at least a working electrode, a compensating electrode and a counter electrode, wherein the compensating electrode and the working electrode are positioned on the same working surface and isolated in different spaces, and the space where the compensating electrode is positioned comprises a compensating electrode filter layer for selectively removing formaldehyde. Provided with the parallel compensating electrode which is unlimitedly consistent with the working electrode in characteristic, the formaldehyde sensor eliminates the influence of interference gas and also eliminates a formaldehyde detection error caused by environmental temperature or humidity change, and thereby overcoming the difficulty of low resolving capability caused by too many interference factors when a traditional electrochemical sensor detects low concentration formaldehyde and having low detectability and high selectivity. The sensor also overcomes the defects of complicated operation and incapability of continuous measurement of existing products in markets.

The invention provides a pipeline leakage detection method based on pipeline pressure data. According to the method, firstly, the resistance factor of each part of pipeline is calculated according to the pipeline pipe diameter, the roughness degree, the medium density and the local resistance of parts such as elbows in the pipeline; then, the pressure drop of each part is worked out according to the initial flow rate, and the pressure value of each detection point is calculated through being combined with the pressure of the initial end; finally, a theoretical value is subjected to comparison analysis with the actual measured value, so that the pipeline leakage condition is obtained, and the position of a leakage point is positioned. The method provided by the invention has the advantages that the factors, such as the pipe diameter, the roughness degree and the local resistance of various components, for reflecting the concrete conditions of the pipeline in the whole pipeline are fully considered, whether the existing pipeline leaks or not can be effectively judged, and the prediction precision is higher.

The invention provides a temperature and pressure integrated sensing device based on high birefringence photonic crystal fiber surface plasmon resonance and a measuring method thereof. The sensor includes a wide spectrum light source, a fiber connector, a common single-mode fiber, a high birefringence plated film photonic crystal fiber and a spectrometer. The external temperature and the pressureof the high birefringence plated film photonic crystal fiber are judged through surface plasmon resonance wave spectrums detected by the spectrometer. In a condition of a certain pressure, when the external temperature of the sensor increases, the resonance wavelength is reduced; when the external temperature drops, the resonance wavelength is increased. In a condition of a certain temperature, when externally applied pressure of the sensor increases, the resonance wavelength is increased; when the externally applied pressure is reduced, the resonance wavelength is reduced. A light source is replaced by the light source the wavelength of which is close to a surface plasmon resonance wavelength, and a loss spectrum analysis method is utilized to determine a position where surface plasmon resonance occurs. According to the invention, the external temperature and the pressure can be analyzed and detected once at the same time.

The invention belongs to the technical field of power sources, and particularly relates to a power source automatic calibration device and a calibration method thereof. The power source automatic calibration method comprises the following steps of utilizing a computer module to read voltage values and current values of two different points of a to-be-calibrated power source through a PMbus (power management bus), quickly calculating the calibration parameters through programs, transmitting the calibration parameters to an MCU (micro controller unit) in the to-be-calibrated power source, and enabling the MCU to store and call the calibration parameters to calibrate the voltages and the currents, so as to output the qualified power source meeting the precision requirement. The power source automatic calibration device and the calibration method have the advantages that the defects of complicated operation, low efficiency, low precision and the like of the traditional manual calibration are overcome, the production efficiency is obviously improved, and the precision is also ensured.

The invention provides a method for transfer printing, positioning and stamping for fabric or leather, which comprises the following steps of: (1) selecting a base membrane, wherein the base membrane is selected from PET (polyethylene glycol terephthalate), BOPP (biaxially-oriented polypropylene), aluminum-plated stamping membrane or paper; (2) printing in a dyeing way; printing one color, firstly drying, and printing next color and carrying out the next drying, till that a preset pattern is formed by printing all color cells; (3) positioning and gluing, and printing the glue on the position to be gilded on the base membrane which is printed by ink, wherein the glue is selected from polyurethane or polyamide; and (4) gilding, gilding the position printed with the glue, and drying under low temperature and rolling simultaneously, so that the base membrane to be transfer printed, positioned and stamped attached with a dyeing pattern is prepared, wherein the drying temperature is from 50 DEG C to 60 DEG C; (5) hot-pressing; and (6) rolling in a separating way. The method has the beneficial effects of: being free from coating release agent, short in labor hour, and low in cost; advanced in gilding mode, quick in speed and good in effect, and capable of being secondly gilded.

The invention discloses a silicon nano cone array coated with a gold film as well as a preparation method and an application thereof. The array is a silicon nano cone sequence array with a surface coated with a gold film, wherein the conical bottom diameter of silicon nano cones forming the silicon nano cone sequence array is 180nm to 220nm, the cone height is 450nm to 550nm, the cone period is 250nm to 350nm, and the thickness of the gold film is 15nm to 25nm. The preparation method comprises the following steps: first synthesizing polystyrene colloidal spheres on a silicon substrate to form a single-layer colloidal crystal template by virtue of a gas-liquid interface self-assembling technology, placing the silicon substrate with the single-layer colloidal crystal template in a sulfur hexafluoride atmosphere, etching the silicon substrate by virtue of plasma to obtain the silicon substrate with silicon nano cone sequence array, and depositing the gold film on the silicon substrate with the silicon nano cone sequence array by utilizing an ion beam sputtering technology or thermal evaporation deposition technology to obtain a target product. The silicon nano cone array can be used as an active substrate of surface enhanced raman scattering to measure the content of clenbuterol hydrochloride attached thereon.

The present invention relates to a metal material preparation method, particularly to a method for preparing a metal through continuous reduction in a molten salt medium. According to the method, a molten alkali metal and alkaline earth metal mixing halide MaY-MeY2 is adopted as the flux of a molten salt medium, an alkaline earth metal oxide MeO / alkaline metal halide MaY mixture capable of being dissolving in the flux of the molten salt medium is used to replace an alkaline metal so as to be adopted as a reduction agent, the specifically-selected MeO / MaY mixture is added to the molten MaY-MeY2 flux to form a MeO-MaY-MeY2 molten salt, the molten salt medium is subjected to electrolysis to decompose the MeO dissolved in the medium so as to finally obtain the Ma-MaY-MeY2 molten salt medium, an oxide MO is added to the formed Ma-MaY-MeY2 molten salt medium under the support of the electrolysis process performing under the conditions, and the alkali metal Ma instantly performs thermal reduction on the added oxide MO so as to prepare the metal M. According to the present invention, the disadvantages of complex operation and danger of the direct alkali metal reduction agent adding in the traditional thermal reduction are overcome; the excessive use of the alkali metal reduction agent is solved, and the continuous production can be achieved; and the cost is low, and the energy consumption is low.

The invention relates to a fiber sensor, particularly relates to a multifunctional sensor with microstructure fiber surface plasma resonance and a preparation method thereof. The two sides of the photonic crystal fiber substrate of the fiber are provided with fan-shaped openings that surface of which are plated with gold films. Tips of the bottom ends of the fan-shaped openings are provided with silver nanowires. The core of the photonic crystal fiber substrate is provided with a magnetic fluid, and the outer side of the core is provided with a cladding air hole. The preparation method comprises the steps of: polishing the fan-shaped openings on the photonic crystal fiber; filling the silver nanowires; uniformly plating the gold films on the surface of the fan-shaped openings; pressing themagnetic fluid into the photonic crystal fiber from a small tube; and coupling and splicing the two ends of the common single mode fiber and the photonic crystal fiber through the self-calibrating function of the a fiber fusion splicer. The sensor of the invention can achieve the analysis and detection of the external magnetic field intensity, the refractive index of the to-be-measured liquid andthe external temperature in one time, therefore, the technical defects that the conventional detection technology is complex in operation, low in detection sensitivity and non-real time online detection are overcome.

The invention provides a treatment device and method for removing heavy metals out of sewage. The treatment device comprises a tank body, wherein a water inlet pipe is connected to the bottom of the tank body, a water outlet pipe is connected to the upper end of the tank body, a sandstone initial filter layer, a microbial adsorption layer, filter cloth and a granular activated carbon adsorption layer are sequentially arranged in the tank body from bottom to top, and the microbial adsorption layer is provided with spheres of which the surfaces are attached with microbes. By the treatment device and the treatment method, the disadvantages of the traditional metal ion removal methods that the cost is high, the operation is complicated, low-concentration wastewater is difficult to treat are overcome, and treated water can reach reuse standards by using a microbial treatment manner and adopting a multi-stage filtration and adsorption manner; meanwhile, potential heavy metal resources are recycled.

The invention discloses a 3D four-wheel aligner with no car pushing required, comprising an image processing and analyzing general module, a vehicle position compensation module, a hardware parameter compensation module, two cameras and four target disks with regular patterns. The 3D four-wheel aligner with no car pushing required is capable of overcoming the defect that a 3D four-wheel aligner with car pushing required is complex in operation. A test can be carried out directly once the target disks are hung, with no car pushing required. The operation is very simple and the data is more accurate. In view of the characteristic that the 3D four-wheel aligner with car pushing required in the market is complex in cart pushing, the 3D four-wheel aligner with no car pushing required in the invention is capable of carrying out measurement directly once the target disks are installed, with no cart pushing required. The technology adopted in the 3D four-wheel aligner with no car pushing required in the invention is totally different from that of the 3D four-wheel aligner with car pushing required, wherein the 3D four-wheel aligner with car pushing required uses position change of the target disks before and after cart pushing to calculate vehicle four-wheel alignment data, while the 3D four-wheel aligner with no car pushing required in the invention uses space structure of the target disks to calculate the vehicle four-wheel alignment data.

The invention discloses a parameterized three-dimensional geological modeling method and system and an information data processing terminal, and belong to the technical field of geological modeling. The method is characterized in that the parameterized three-dimensional geological modeling method comprises the following steps: 1, according to drilling data of field exploration, arranging the drilling data into a database table according to a certain data format; 2, automatically importing the sorted data into a modeling space; 3, according to a pre-programmed program, automatically forming a surface in a point-to-point manner, and generating each geological layer; 4, determining an outer boundary in a parameterized manner, creating an outer contour of the geologic model, and automaticallyshearing and combining; and 5, according to the changed drilling data points, executing the steps again, and completing parameterized updating creation of the model. By the adoption of the technical scheme, the complex geological modeling process is parameterized, the labor amount of traditional manual modeling is reduced in a computer programming algorithm mode, and geological modeling is more intelligent.

The invention relates to an electromagnetic vibrator, in particular to a feeding device for packaging sites of various vibrating machines or granular products. In the feeding device, a feeding groove (1) is formed at the upper end of a machine base (8); a hopper (4) is arranged at the upper end of the right side of the feeding groove (1); nuts (7) are arranged on the outer side of plate springs (6) uniformly; the plate springs (6) are arranged on both sides of the machine base (8); an armature (5) is arranged on the inner side of the plate spring (6) on the left side; and an electromagnet (2) and a coil (3) are fixed in the machine base (8). The electromagnetic vibrator is accurate, is simple, convenient, quick and reliable in operation, overcomes the defects of low accuracy, complex operation, artificial feeding and the like of the conventional mechanical weighing equipment, and has the critical effect on the improvement of the integral packaging efficiency of the products.

A preparation method of a biaxially stretched polyvinyl fluoride film belongs to the technical field of polymer processing, and the preparation method comprises the following steps: well mixing polyvinyl fluoride resin powder, a solvent, a plasticizer and fillers to obtain a mixed material with viscosity of 1.0 cpa-1.2 cpa, quantitatively delivering the mixed material to a hopper of a twin screw extruder by a slurry pump, performing strip casting by the twin screw extruder and a mould head, cooling and setting the casting strip by a cold hub, performing longitudinal stretching, transverse stretching, devolatilization, setting, surface treatment, trimming to obtain the biaxially stretched polyvinyl fluoride film. The preparation method of the invention reduces the processing temperature, and increases the film uniformity; by selective addition of fillers or pigment, the color of the film can be changed, which extends the application field of the film; the biaxial stretching process step improves the mechanical properties of the film, and increases the barrier property of the film; and a film product with good uniformity and excellent surface properties is obtained.

The invention discloses a solar energy-driven coal pyrolysis coupling coalite gasification reactor and a method. The reactor mainly comprises a lifting pipe, a cyclone separator and an annulus inner circulation fluidized bed, wherein an outlet of the lifting pipe is connected to the cyclone separator, and the lifting pipe and the cyclone separator are arranged inside the annulus inner circulation fluidized bed; the lifting pipe is located at the center of the annulus inner circulation fluidized bed, a pipe wall of the lifting pipe is parallel to the wall surface of the annulus inner circulation fluidized bed, and an inlet of the lifting pipe extends out of the bottom of the annulus inner circulation fluidized bed for a distance; an air distributor is arranged at the bottom of the lifting pipe, and a coal feeding pipe is connected to the side wall of the lifting pipe; the top of the annulus inner circulation fluidized bed is provided with a light inlet window, the outer wall of the annulus inner circulation fluidized bed is coated with a heat insulation layer, and the bottom of the annulus inner circulation fluidized bed is provided with an annular air distributor.

The invention discloses a method for determining an insertion site of a transgenic line by a re-sequencing technique. The method comprises the following steps of (1) extracting DNA (deoxyribonucleic acid) of a genome of the transgenic line, wherein the total amount is at least 2g; (2) re-sequencing the genome, wherein the data size is at least 12G; (3) using a T-DNA sequence of a transgenic carrier as a template, and comparing and analyzing the obtained sequencing data, so as to obtain information of the insertion site; (4) according to the information of the insertion site, designing a primer, and performing PCR (polymerase chain reaction) verification, so as to determine the insertion site of each transgenic line. The method for determining the insertion site of the transgenic line has the characteristics of maturity, simplicity and high success rate, and can be widely applied to determine the insertion site of the transgenic line.

The invention relates to the technical field of human body foot type detection, and provides a human body foot type arch detection method. The human body foot type arch detection method comprises the following steps: utilizing a physical digitalizer to acquire discrete point cloud data of a foot to be detected; generating a grid curved surface; enabling the grid curved surface to generate a closed curved surface; establishing a local coordinate system; solving plane intersection points of the closed curved surface and an equation that z minus 5 is equal to 0; performing the first place connection of the obtained intersection points to generate a closed curve; using that x equals to a as a divisional plane, wherein a expresses a real number, and partitioning into two point sets; finding the maximal intersection points (A and B) of coordinate y; marking the midpoint of a connecting line of A and B as E, drawing a straight line perpendicular to the straight line AB, and calculating two intersection points (F and G) of the vertical straight line and the closed curve line; calculating a length ratio r of the line segments EF and FG; comparing the length ratio r with the arch judging standard to determine the arch type. The human body foot type arch detection method disclosed by the invention improves the human body foot type arch detection reliability, and is high in accuracy, zero in misdiagnosis rate and high in efficiency.

The invention discloses a multiple XBT (expendable bathythermograph) probe automatic throwing and measuring system. A throwing mechanism automatically controls throwing of multiple XBT measuring probes, so that the probes measure the ocean temperature profile data in quick descending processes. The system is characterized in that a deck unit of the system comprises a fixed throwing frame, a data acquisition control box and a close range display terminal; the fixed throwing frame is formed by a base and a plurality of same single throwing devices; the fixed throwing frame and the close range display terminal are connected with the data acquisition control box by cables; the fixed throwing frame, the close range display terminal and the data acquisition control box cooperate jointly to complete detection of in-place statuses of the probes, execution of probe throwing actions and acquisition and transport of temperature profile measured data after the probes enter the water; an observation room unit of the system comprises a data processor and a control and real-time data processing module installed inside the data processor; and the observation room unit completes the processes of sending a control instruction to the data acquisition control box via a CAT5 outdoor Ethernet cable and processing the feedback information of the data acquisition control box, simultaneously receives, processes and stores the temperature profile measured data and draws curves, and can achieve data communication with an upper data center as required.

The invention relates to a cleaning agent for a solar panel. The cleaning agent comprises the following components by mass percent: 10 to 30 percent of surface active agent, 10 to 30 percent of solvent, 0.5 to 5 percent of electrostatic resisting agent, 10 to 30 percent of antifreezing agent, 2 to 5 percent of softening agent and 5 to 20 percent of oil removing agent. The solar panel is conventionally cleaned manually and rinsed mechanically at present, and the traditional way for cleaning the solar panel has the weaknesses such as high labor cost, large workload, high risk, complexity in operation, halfway cleaning, short washing period and the like. The cleaning agent for the solar panel is strong in decontamination capacity, anti-electrostatic, wide in environmental applicability, good in stability, low-foam, nondestructive for the glass surface, free from peculiar smell, toxic-free, corrosiveless, inflammable, unexplosive and free from polluting the environment.

The invention, which belongs to the field of environmental monitoring and electrochemical sensors, relates to a tetrabromobisphenol A molecularly-imprinted electrochemical sensor, and a preparation method and application thereof. A glassy carbon electrode modifying a multi-walled carbon nanotube and gold nanoparticles is used as a working electrode; a polymer film of polypyrrole and tetrabromobisphenol A is prepared by using a cyclic voltammetry method; and then tetrabromobisphenol A is eluted to obtain a molecularly-imprinted electrochemical sensor for direct electrochemical detection of tetrabromobisphenol A. Compared with the traditional detection method, the provided method has characteristics of convenient operation, high sensitivity, high specific recognition ability, high reproducibility and strong anti-interference ability.

The embodiment of the invention discloses a query method and device based on a heterogeneous database. The method comprises the steps: when at least two isomerous databases are connected, obtaining aquery request for the databases, wherein the query request comprises query conditions and a target database, and the query conditions are compiled by adopting a preset universal operation language; determining a target operation language adopted by a target database in the query request; converting the query condition into a query statement conforming to the target operation language; querying inthe target database by utilizing the query statement to obtain a query result; and outputting the query results.

The present invention relates to the synthesis process of different kinds of 2-acyl-4-alkyl phenol, which is the important intermediate of metal extractant 5-alkyl-2-hydroxyalkyl benzopheonone oxime. Through a two-step reaction under relatively mild condition, the present invention can obtain the target product in high yield and high selectivity, and the solvent, the reaction produced halohydrocarbon and the catalyst aqua may be reused without exhaust. The synthesis process has industrial production foreground obviously.

The invention discloses an analyzing device and method for a ship ballast water treatment process. The device comprises a platform, a micro-fluidic chip, a micro-valve control assembly, an optical excitation assembly, an optical detection assembly and a data processing assembly, wherein the micro-fluidic chip consists of a glass sheet and polydimethylsiloxane fixed on the glass sheet; a plurality of sample liquid storage tanks, a plurality of sheath liquid storage tanks and a plurality of waste liquid storage tanks are arranged on the surface of polydimethylsiloxane. According to the analyzing device, the whole complicated detection process is integrated to the micro-fluidic chip, and a micro-valve is automatically controlled on the micro-fluidic chip through a computer program so as to realize multi-time contrast detection; for analysis on the whole process of the ship ballast water treatment process, the device is easy to operate. Because the device uses the micro-fluidic chip as a micro-platform for detecting ship ballast water, the related photoelectric detection equipment adopts a small-size structural form, and therefore, compared with existing large-scale detection equipment, the device has the advantage of microminiaturization.

The invention discloses a fatigue life evaluating device for flexible gears. The fatigue life evaluating device comprises a mechanism bottom plate and a transmission shaft arranged horizontally and used for mounting a tested flexible gear. A fixing support, a loading device, a driving device, a magnetic powder brake, a torque sensor and a speed increaser are mounted on the mechanism bottom plate, the fixing support is used for fixing the flexible gear and mounting the transmission shaft, the loading device is fittingly installed with the fixing support and is used for loading the tested flexible gear, components of the driving device are sequentially and fittingly connected to the tested flexible gear, and the magnetic powder brake, the torque sensor and the speed increaser are installed according to the preset requirement on coaxiality and are sequentially and fittingly connected to the tested flexible gear. The driving device and the loading device are fittingly installed according to the preset requirement on coaxiality, and the loading device and the speed increaser are fittingly installed according to the preset requirement on parallelism and the preset requirement on a meshing clearance of gears. The fatigue life evaluating device for flexible gears can overcome shortcomings that an operation process is complicated, time and labor are wasted, cost is high, testing effects are unsatisfactory, and the like in the prior art. Besides, the fatigue life evaluating device has the advantages of simplicity and convenience in operation process, capability of saving time and labor, low cost and perfect testing effect.

The invention discloses a 24-site micro-array screen printing electrochemical sensing device. The 24-site micro-array screen printing electrochemical sensing device comprises a sliding layer, an insulating layer for limiting a reaction area, a basic layer and a supporting layer for fixing the whole device which are sequentially arranged from top to bottom, wherein the basic layer and the insulating layer are fixed to the supporting layer; the sliding layer is in sliding connection with the supporting layer; a conductive printed circuit board is converged to the tail end of the basic layer andis connected with a joint, and is used for connecting an electrochemical working station. The invention also discloses application of the device. The 24-site micro-array screen printing electrochemical sensing device and the application of the device have the advantages that through combination of a conventional immunization technique and a sensor technique, a new quick, convenient and sensitive detection method is provided for trace detection of enrofloxacin and tripolycyanamide small-molecule substances; meanwhile, multi-channel and detection of multiple samples can be realized; moreover, the technical problems that the detection time is long, an instrument is expensive, an operation is complicated, the sensitivity is low, the speciality is poor, the detection range is narrow and the like when an original detection method only aims to a single detection material are solved.

The invention relates to a simple, quick, specific and sensitive real-time fluorescence PCR (Polymerase Chain Reaction) detection method and a kit thereof for simultaneously detecting one or more soybean virus diseases of tobacco ringspot viruses, southern bean mosaic viruses, tomato ringspot viruses and arabis mosaic viruses. In the real-time PCR detection method, primer sequences of SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6, SEQ ID NO:7 and SEQ ID NO:8 and oligonucleotide probes of SEQ ID NO:9, SEQ ID NO:10, SEQ ID NO:11 and SEQ ID NO:12 are used. The real-time fluorescence PCR detection method and the kit thereof are suitable for departments of port inspection and quarantine, agricultural production, plant protection, and the like.

The invention relates to the field of coffee extraction equipment, in particular to pressurizing-type portable coffee extraction equipment. The pressurizing-type portable coffee extraction equipment is characterized in that a manual pressurizing cover, a cup body, a pressurizing piston assembly and an integrated filter screen assembly are included; the cup body is of a cylindrical structure of which the upper end and the lower end are open, a partition plate is arranged in the cup body and partitions an internal space of the cup body into a piston chamber and a high-pressure coffee extraction chamber, and a circular sealing groove hole is formed in the center of the partition plate; the pressurizing piston assembly comprises a piston, and the piston is located in the piston chamber; the manual pressurizing cover is provided with an outer thread and is in threaded connection with the upper end of the cup body; the integrated filter screen assembly comprises a filter screen cover, a filter screen and a filter outlet cover, the filter screen is arranged in the filter screen cover, and a circular out-in opening is formed in the filter screen cover. According to the equipment, a pressurized extraction technology and a portable function are combined, and professional concentrated coffee can be made at any place extremely fast and conveniently.

The invention discloses a method for quickly detecting the content of L-glutamine in a fermentation liquor. The method comprises the following steps: (1) selecting a cultivation strain of glutamine for activating culture, and then transplanting the cultured strain to a fermentation medium for cultivation; (2) conducting oscillation and centrifugation on the fermentation liquor to obtain a liquid to be detected; (3) preparing a developing solvent, a color developing agent and an eluant; (4) drawing a standard curve; (5) utilizing the liquid to be detected obtained in step (2) for sample spotting on a thin silica gel plate, carrying out developing, color developing, elution and sampling, utilizing an ultraviolet-visible spectrophotometer to measure a light absorption value, and obtaining the value, corresponding to the light absorption value, on the standard curve drawn in step (4), wherein the value is the content of the L-glutamine in the fermentation liquor. The method can be used for detecting the content of the L-glutamine in the fermentation liquor quickly, and is high in accuracy, fast, simple, low in cost and high in timeliness.

The invention discloses a method for fast determining the contents of nitrogen, phosphorus and potassium in phosphorus-potassium-carbon ammonium. The method is improved based on a determining acidometry for the content of ammoniacal nitrogen in GB3599-83 ammonium bicarbonate and ammonia water, and comprises the following steps of: adding the phosphorus-potassium-carbon ammonium with the chemical formula of NH4HCO3.x(NH4)2HPO4.yKHCO3 into an excessive and standard sulfate solution, fully reacting, then removing carbon dioxide, then adding an acid-base reaction indicating agent, and back-dropping by using standard sodium hydroxide till the color of the indicating agent is changed; and then fast determining the content of nitrogen, phosphorus and potassium according to a result of a blank test. Due to adoption of the method, the defects of complex operation, fussy steps, easy generation of error and expensive reagent when the contents of the nitrogen, the phosphorus and the potassium in the phosphorus-potassium-carbon ammonium are detected according to the traditional standard are overcome, and the detecting effects of fasteness, simpleness and accuracy are achieved.

The invention discloses a purification method of an everolimus intermediate. The method specifically includes: (1) reacting rapamycin with 2-(tert-butyl diphenylsilyl)oxyethyl trifluoromethanesulfonate to obtain a reaction solution containing an everolimus intermediate shown as formula I; and (2) filtering the everolimus intermediate reaction solution and conducting column chromatography. Specifically, the eluant for column chromatography is successively a small polar organic solvent and a mixed solvent of small polar organic solvent and ethyl acetate, wherein the small polar organic solvent is n-hexane, n-heptane, cyclohexane or methyl tert-butyl ether. After elution by the method of step (2), the mixture of ethyl acetate and small polar organic solvent is adopted as the eluant, and separation is carried out to obtain unreacted rapamycin. The method provided by the invention solves the problems of tedious post-treatment of the everolimus intermediate reaction solution and the need ofcolumn chromatography for petroleum ether.