55 results about "Atomic fluorescence" patented technology

The invention provides a method for rapidly detecting wastewater pollutants by atomic fluorescence spectrometry, and belongs to the technical field of wastewater treatment.The method comprises the steps that atomic fluorescence spectrum data of a wastewater sample are collected to establish a spectrum interference matrix to characterize the spectral line overlapping condition between elements; abnormal values are recognized through statistical analysis, a spectrum outlier matrix is built, abnormal fluorescence intensity distribution is recorded, sample matrix non-characteristic fluorescence signals are measured, a background fluorescence interference matrix is built, background interference intensity is quantized, system signal change rules are continuously monitored and detected, and a signal drift tendency matrix is built to predict the signal drift tendency. A spectrum interference matrix and a background fluorescence interference matrix are processed through a spectrum analytic function, compensation factors are calculated, spectrum overlapping and background interference influences are corrected, system drift is corrected in real time, and a final wastewater pollutant concentration detection result is output, so that the technical problem of unstable detection precision caused by coupling of multiple interference factors is solved.

The invention discloses an atmospheric microparticulate monitoring device and method based on multi-mode sensing, and relates to the technical field of ecological environment monitoring. The device comprises a data acquisition system used for carrying out real-time sample acquisition and signal conversion on conventional pollution factors and meteorological parameters in air; the data analysis system is used for carrying out concentration analysis and early warning on the signals converted by the data acquisition system; the error evaluation system is used for performing error evaluation on the key indexes of the data acquisition system according to the acquired samples; and the data transmission system is used for carrying out cross-regional transmission on the sample acquired by the data acquisition system and the analysis result according to a sensitivity quantity algorithm based on an anonymous model. Real-time monitoring of atmospheric micro-particles with high accuracy and strong applicability is realized based on atmospheric monitoring standards independent of a meteorological monitoring framework, and reasonable adjustment of device parameters is realized by cooperation of the atomic fluorescence spectrometer and the enrichment sampling and pretreatment unit.

The utility model provides a heat digestion reduction system for liquid chromatography and atomic fluorescence is used together, including heat digestion device, cooling device, sucking pump, gas -liquid separator, digestion agent container and reducing agent container. Heat digestion device includes digestion pipeline and heating device, and heating device is used for heating digestion pipeline. Cooling device includes heat dissipation board and cooling pipeline, and heat dissipation board installs on cooling pipeline and is used for heat dissipation to cooling pipeline. The utility model discloses compared with prior art in ultraviolet lamp digestion, and the higher stability of digestion efficiency is not needed to consider the risk of ultraviolet lamp breakage, and heating temperature will also reduce the memory effect in pipeline, improve hydride generation efficiency. Through setting up cooling device to the mixed liquid of measuring in pipeline after completing heating digestion is cooled, make the aerosol that generates because of heating digestion quick liquefaction, effectively reduce the system pressure in pipeline, avoid the risk of pipeline burst.

This invention discloses a method for determining the arsenic content in ores, belonging to the field of ore element detection technology, comprising the following steps: (1) weighing the ore sample, adding hydrochloric acid-nitric acid mixed acid for acid hydrolysis, then adding hydrofluoric acid and perchloric acid for auxiliary digestion, evaporating to near dryness, and dissolving the residue with hydrochloric acid; (2) adding a thiourea-ascorbic acid-citric acid mixed reducing masking agent to reduce and mask interfering ions; (3) using an atomic fluorescence spectrometer to determine the fluorescence intensity of arsenic in the sample solution, and calculating the arsenic content according to the standard curve. This method achieves accurate and stable determination of arsenic in various ores such as phosphate rock and iron ore by optimizing sample pretreatment conditions, improving the reduction system and matrix interference suppression strategy.

The invention relates to a reflective two-photon rubidium clock atomic fluorescence collection system. The system comprises a rubidium atom gas chamber, a reflector, an optical filter, a lens and a photoelectric detector. The rubidium atom gas chamber is a reflection cavity with a parabolic cylinder structure, the side plane of the rubidium atom gas chamber is a polling light incident plane and is plated with a color separation film for transmitting polling light and reflecting atomic fluorescence, and the polling light incident point is located at the focal point of the parabolic section; the opposite plane of the parabolic cylinder of the reflection cavity is an atomic fluorescence emergent surface, the inner wall of the parabolic cylinder is plated with an atomic fluorescence reflecting film, rubidium atom steam is contained in the parabolic cylinder, and a preset included angle is formed between the reflector and the atomic fluorescence emergent surface and used for reflecting a light path to enable a fluorescence collection light path and a polling light path to be arranged in parallel and converging emergent atomic fluorescence. The optical filter filters stray light with non-target wavelength, the lens converges atomic fluorescence after light filtering, the photoelectric detector receives the fluorescence and converts the fluorescence into an electric signal, and frequency stabilization control of the laser is achieved. By adopting the system, the space utilization rate, the system signal-to-noise ratio and the fluorescence collection efficiency can be improved.

The invention discloses a bifocal reflection-type atomic fluorescence detection system for an atomic beam interferometer. The bifocal reflection-type atomic fluorescence detection system comprises a vacuum cavity, a reflector and a detector, the vacuum cavity is a sealed cavity; an atomic beam generated by an atomic furnace mounted in the vacuum cavity is propagated in the y-axis direction in the vacuum cavity; a window is formed in the cavity wall of the vacuum cavity in the x-axis direction, and detection light enters the vacuum cavity from the window and propagates in the x-axis direction; windows are formed in the opposite positions of the two sides of the vacuum cavity wall in the + / -z axis direction, and a reflecting mirror and a detector are correspondingly installed outside the windows respectively; the propagation directions of the atomic beam and the detection light are perpendicular to each other, and in an intersection area of the atomic beam and the detection light, atoms absorb the detection light to jump to a high energy level and then spontaneously radiate fluorescence, namely an atomic fluorescence light source; the atomic fluorescent light source emits isotropic fluorescent light to the periphery, a part of the light irradiates the reflector and is focused on the receiving end face of the detector after being reflected, and the detector detects a fluorescent signal, converts the fluorescent signal into an electric signal and reads the electric signal.

This utility model belongs to the field of optical measurement technology and discloses an atomic fluorescence spectrometer, including: a frame, a worktable, and a positioning component. The frame supports the atomic fluorescence spectrometer, and the worktable is connected to the frame for placing the sample to be tested. The positioning component includes a telescopic component, a movable component, a guide component, a squeezing component, and a rubber component. The telescopic component is disposed on the worktable, and its movable end is drivenly connected to the movable component. The movable component is movably disposed on the worktable. The guide component is connected to the movable component and slidably disposed on the worktable. The squeezing component is connected to the movable component, which can achieve squeezing and fixing of the sample to be tested, thereby effectively limiting the position of the sample and avoiding positional displacement caused by external factors during the detection process, thus ensuring the accuracy of the atomic fluorescence spectrometer detection results.

The invention discloses a method for extracting and quantitatively detecting arsenic with different valence states in coal, which comprises the following steps: mixing standard solutions of trivalent arsenic and pentavalent arsenic, and adding a mixed solution of phosphoric acid and ascorbic acid for dilution to obtain trivalent / pentavalent arsenic mixed standard solutions with different concentration gradients; detecting the trivalent / pentavalent arsenic mixed standard solution by adopting a liquid chromatography-atomic fluorescence spectrometer to obtain peak areas of different valence arsenic concentrations, and drawing a standard curve; the method comprises the following steps: adding a coal sample into a microwave digestion instrument, extracting arsenic with different valence states by taking a mixed solution as an extracting agent, and diluting an extracting solution to obtain a sample to be detected; and sucking the sample to be detected into the liquid chromatography-atomic fluorescence spectrometer for detection, and calculating the concentrations of arsenic with different valence states according to the standard curve. According to the method, the arsenic element in the coal sample is extracted by taking the mixed solution of phosphoric acid and ascorbic acid as the extracting agent, so that the problem of oxidation of the arsenic element can be avoided, and the extraction rate and the detection accuracy of trivalent arsenic and pentavalent arsenic are improved.

The application discloses a method for determining tin and inorganic compounds thereof in workplace air. The method comprises the following steps: firstly, using a microporous filter membrane to sample the workplace air; then, using a disposable PP polypropylene digestion tube, a digestion solution and a graphite digestion instrument to digest the microporous filter membrane after sampling; taking down the cooled microporous filter membrane and quantitatively placing it into a test tube by using a hydrochloric acid solution; adjusting the Ph value by using a sodium hydroxide solution and setting the volume to 25.0 mL; preparing a tin standard solution series and drawing a fluorescence intensity-tin content curve by using an atomic fluorescence spectrometer; analyzing the sample by using the atomic fluorescence spectrometer; the sample fluorescence intensity is proportional to the tin content; and obtaining the corresponding tin content from the fluorescence intensity of the sample according to the drawn fluorescence intensity-tin content curve. The method realizes the analysis and determination of trace, ultratrace tin and inorganic compounds thereof, reduces the instability of blank filter membranes caused by external interference, avoids the phenomenon that the blank filter membrane concentration is opposite to the sample concentration, and improves the determination precision.

Embodiments of the present application disclose a single-atom manipulation system, a control method and an electronic device. The single-atom manipulation system comprises: an atomic cooling device configured to form an MOT atomic group, wherein the MOT atomic group is capable of generating atomic fluorescence of a first target wavelength; an atomic trapping device, wherein the atomic trapping device comprises a laser source and a strong focusing lens, the laser source emits a target laser beam of a second target wavelength, the target laser beam passes through the strong focusing lens to form an optical tweezer array to trap the MOT atomic group; and an imaging device, wherein the imaging device is sequentially provided with a filter, a noise fluorescence shielding device, a plano-convex lens and an imaging unit in a reflection direction of the focused atomic fluorescence, and the noise fluorescence shielding device is configured to shield noise fluorescence generated by the atomic cooling device.

The invention discloses an efficient and safe microwave digestion-atomic fluorescence detection method for total selenium in soil, and belongs to the technical field of analytical chemistry and environmental detection.According to the method, the content of total selenium in selenium-rich soil is rapidly, accurately and safely measured by optimizing the sample weighing amount, the microwave digestion procedure and the detection conditions, and the detection accuracy is improved. The method comprises the following specific steps: weighing 0.1 g of an air-dried and sieved selenium-rich soil sample, adding 5mL of concentrated nitric acid, then carrying out a microwave digestion process of heating to 175 DEG C for 12 minutes and maintaining for 48 minutes, after digestion, adding 5mL of 6mol / L hydrochloric acid, carrying out acid removal reduction at 140 DEG C, fixing the volume to 15mL by using 5% diluted hydrochloric acid, and finally determining by using an atomic fluorescence spectrophotometer by using 5% hydrochloric acid as a carrier current and 1% potassium borohydride and 0.5% potassium hydroxide as reducing agents. According to the method, the use of dangerous reagents such as hydrofluoric acid and perchloric acid is avoided, the detection period is remarkably shortened, the linear range is 0-10 mu g / L, and the correlation coefficient is Rgt; the average recovery rate is up to 101.13%-101.51%, and the precision is RSDlt (Research Standard Defect); the requirements of rapid detection of the total selenium content of the selenium-rich soil, agricultural production and environmental evaluation are met.

The utility model provides a liquid chromatography-atomic fluorescence flow path analysis system, which relates to the technical field of chemical analysis, and comprises a mobile phase processing device, a sample online reaction device, a gas path device and a gas-liquid separation device, the sample online reaction device is used for carrying out separation, online ultraviolet digestion and hydride generation on a sample; according to the device, the mobile phase does not need to be degassed manually, an experimenter only needs to prepare the mobile phase and place a pipeline in a corresponding reagent bottle, and an instrument can perform online degassing on the mobile phase, so that the time required for preparing the mobile phase is saved, hydrogen is supplemented when a sample reacts with a reducing agent to generate gaseous hydride, the dosage of potassium borohydride is effectively reduced, and the production cost is reduced. While the physical health of experimenters is ensured and a friendly laboratory environment is provided, the influence of water vapor on a test result can be reduced, and the sensitivity and the stability of an instrument are improved.

The application belongs to the technical field of microorganisms, discloses a strain of Desmodesmus arsenicoxydans with arsenic oxidation function and application thereof in soil remediation, and specifically discloses a strain of Desmodesmus arsenicoxydans B3. The application separates a strain of microalgae B3 with arsenic oxidation function, the strain belongs to the genus Desmodesmus and can oxidize As(III) under day-night alternation conditions. Arsenic forms in a flooded soil solution are determined by using a liquid chromatography-atomic fluorescence spectrometer. Arsenic form analysis shows that As(III) is oxidized into As(V), the concentration of As(III) and total arsenic in soil pore water is reduced, which indicates that the Desmodesmus arsenicoxydans B3 can effectively oxidize As(III) and remove total arsenic in the soil solution under the condition of flooding, reduce the biological availability of arsenic, and play an important role in remediation of arsenic contaminated soil.

The invention discloses an atomic fluorescence detection device and method, and the device comprises an atomic gas chamber which is used for spontaneously radiating atomic fluorescence rays; the reflecting device is used for reflecting the fluorescent rays, so that the fluorescent rays reflected by the reflecting device are converged to the spherical lens; the spherical lens is used for receiving the reflected fluorescent rays and increasing the convergence degree of the fluorescent rays reflected by the reflecting device; and the fluorescence detector is used for receiving and detecting the fluorescence rays. The atomic gas chamber has the advantages that the principle is clear, the structure is simple, and by adjusting the distance between the rectangular reflecting mirror in the reflecting device and the point light source at the central position of the atomic gas chamber and the distance between the first prismatic right-angle reflecting mirror and the point light source and the distance between the second prismatic right-angle reflecting mirror and the point light source in the vertical direction, the atomic gas chamber can be reflected; reflected fluorescent rays are converged to the spherical lens to the maximum extent, and the fluorescent ray detection efficiency is improved.

This invention discloses an atomic fluorescence spectrometer and an automated sample measurement system, belonging to the field of atomic fluorescence spectrometer technology. This invention effectively ensures stable instrument operation and efficient atomization reactions through a comprehensive self-checking mechanism combined with adaptive matching of different analyte types and detection modes. Simultaneously, through precise cup positioning, automatic sample sequence configuration, and orderly scheduling of the detection process, coupled with reference light baseline correction, multi-level blank measurement, and standard curve fitting to establish quantitative correlations, it fully covers the entire detection chain from automatic sample introduction, signal acquisition, signal optimization processing to concentration calculation and correction, effectively improving the accuracy and repeatability of sample measurement results. It achieves fully automated operation of the entire process—including power-on self-check, parameter matching, automatic measurement, data calibration, result calculation, and standardized report generation—without extensive manual intervention, adapting to the needs of multi-element, multi-wavelength simultaneous detection and improving the intelligence, standardization, and automation level of atomic fluorescence detection.

The utility model discloses an automatic liquid discharge structure of an atomic fluorescence spectrophotometer, which comprises a filter bin, a liquid discharge component arranged at the top of the filter bin, a flow guide component arranged on one side of the filter bin, a prompt component arranged on one side of the top of the filter bin far away from the liquid discharge component, and a backwashing component arranged at the top of the flow guide component. The liquid drainage assembly comprises a water pump A, a flow guide pipe, a conveying pipe, a filter screen and a purification box, the water pump A is located on one side of the top of the filter bin, and the flow guide pipe is arranged at the input end of the water pump A; through the mutual cooperation of the sleeve, the guide groove, the guide rod, the piston, the spring, the electric contact block A, the electric contact block B and the prompting lamp, when the filter screen in the device is blocked, the piston can be pushed to move upwards by utilizing the continuously rising pressure of blocked water flow, the prompting lamp is automatically turned on to remind a worker, the worker can conveniently observe the blocking condition of the filter screen in time, and the working efficiency is improved. And treatment measures are taken in time.

The application provides a monovalent mercury detection method, and relates to the field of analytical detection technology. The monovalent mercury in a to-be-detected sample is extracted by 2-mercaptoethanol aqueous solution, and the obtained to-be-detected sample liquid is subjected to high performance liquid chromatography-atomic fluorescence spectrometry detection. In the high performance liquid chromatography separation process, the monovalent mercury is completely disproportionated into zero-valent mercury and divalent mercury, and is separated by high performance liquid chromatography, and is subjected to atomic fluorescence spectrometry detection respectively. The mercury of all valence states is reduced by a reducing agent and forms mercury vapor, and then generates a fluorescence signal, and sequentially peaks with a retention time, so that the zero-valent mercury detection peak area and the divalent mercury detection peak area are obtained. According to the zero-valent mercury detection peak area and the divalent mercury detection peak area, the detection concentration of divalent mercury and the detection concentration of zero-valent mercury are obtained by using an external standard method. The concentration of monovalent mercury in the to-be-detected sample liquid is calculated, the accuracy and the sensitivity of detection are high, and efficient analysis and detection of monovalent mercury are realized.

The invention belongs to the field of chemical analysis of spectrometry, and particularly relates to a method for detecting mercury content in copper slag concentrate by atomic fluorescence spectrometry. The method comprises the following specific steps: fully dissolving a copper slag concentrate sample to be measured by hydrochloric acid, nitric acid and ammonium bifluoride, and introducing generated mercury atom steam into an atomic fluorescence spectrometer for measurement in a (3 + 97) nitric acid medium by taking stannous chloride as a reducing agent and argon as carrier gas. The method has the characteristics of low detection lower limit, wide measurement range, high accuracy, good precision, strong practicability and the like.

The invention belongs to the technical field of analysis and detection, and particularly relates to a hollow cathode lamp energy dynamic compensation light path for an atomic fluorescence spectrometer and a light intensity compensation method. The hollow cathode lamp energy dynamic compensation light path comprises a hollow cathode lamp, a lamp coding plate, a spectroscope, a band-pass optical filter and a photodiode, the lamp coding plate is in signal connection with the hollow cathode lamp, light emitted by the hollow cathode lamp passes through the spectroscope, and part of the light is reflected by the spectroscope to enter the band-pass optical filter and then enters the photodiode; the other part of the light enters the atomizer through the spectroscope and is detected by the photomultiplier; wherein the lamp coding board and the photodiode are in signal connection with the main control board. According to the hollow cathode lamp energy dynamic compensation light path for the atomic fluorescence spectrometer and the light intensity compensation method, one-time calibration and one-time measurement are not needed, the calibration frequency is reduced, the reagent dosage and carrier gas are saved, the operation and maintenance cost is reduced, the measurement accuracy and stability of equipment are improved, and the service life of the hollow cathode lamp is prolonged.

The invention discloses a soil, water-based sediment and protocorona sample pretreatment and detection method, and belongs to the technical field of geological and environmental sample analys.According to the method, a one-time digestion and branch detection mode is adopted, synchronous extraction of multiple elements in a sample is achieved by optimizing digestion reagent combination, targeted subsequent treatment steps are combined, and the detection efficiency is improved. The method is respectively adapted to an atomic fluorescence spectrophotometer, an atomic absorption spectrometer, a plasma spectrometer (ICP) and a membrane desolvation-inductively coupled plasma mass spectrometer (ICP-MS), and can efficiently measure more than 10 elements such as As, Sb, Bi, Hg, Ag, Cu, Pb, Zn, Co, Ni, Cd and the like. Compared with a traditional method, the method has the advantages of uniform pretreatment flow, scientific reagent selection, high detection compatibility, remarkable improvement of efficiency and precision and the like, is stable in target peak shape, high in standard recovery rate, excellent in precision and accuracy and suitable for sample analysis in large-scale geological survey, environmental monitoring and mineral resource evaluation, and the detection limit reaches the microgram / kg level.

The utility model relates to the technical field of automatic sample injectors, in particular to an automatic sample injector of an atomic fluorescence spectrophotometer, which comprises a box body, a transverse plate is fixedly connected below the inner wall of the box body, a controller is fixedly connected below one side of the box body, a shell is fixedly connected at the top of the box body, and the transverse plate is fixedly connected with the shell. A material pipe is fixedly connected to the inner wall of one side of the top of the shell, the inner wall of the bottom of the material pipe is fixedly connected with a water inlet pipe of the conveying pump, and a valve is fixedly connected to the inner wall of the lower portion of one side of the material pipe. Through cooperation of a box body, a transverse plate and a fixing structure, when the device is used, a sample tube can be placed between two clamping plates, a lead screw is rotated, the lead screw drives a sliding block to move, the sliding block drives the clamping plate on one side to move, then the two clamping plates are made to be close to each other, a rubber block is attached to the sample tube, and then the sample tube is fixed; the sample bottles with different sizes can be conveniently fixed, so that the sample injection work can be conveniently carried out on the sample bottles with different sizes.

The invention relates to a lake water body heavy metal pollution risk assessment method based on a multi-source analytical model, and the method comprises the following steps: S1, sample collection: collecting lake water body samples by using a water collector in a dry season and a wet season respectively, carrying out membrane treatment on the samples through a microporous filter membrane, and removing suspended matters in the samples to obtain a water sample to be detected; s2, sample detection: pretreating a water sample to be detected, determining the concentrations of Pb, Cu, Zn, Co, As, Cd, Cr, Mn and Ni in the water sample by using ICP-MS (Inductively Coupled Plasma Mass Spectrometry), and determining the concentration of Hg in the sample by using atomic fluorescence spectrometry; and S3, heavy metal spatial distribution characteristics: analyzing the heavy metal spatial distribution characteristics based on inverse distance weighted interpolation in Arc-Gis. According to the method, the double-stage sampling design of the dry season and the wet season is combined, the spatial and temporal distribution characteristics of the heavy metals under different hydrological conditions can be comprehensively reflected, the limitation of a single-index evaluation method is made up, and the method is high in adaptability and suitable for preliminary diagnosis of heavy metal risks of various water bodies.

The utility model discloses an atomic fluorescence spectrophotometer capable of automatically sampling and detecting, and relates to the technical field of atomic fluorescence spectrophotometers. A photometer main body is arranged on one side of the mounting rack; a sampling needle is arranged on the side part of the photometer main body; a sliding block is in sliding fit with the mounting rack; a driving mechanism for driving the sliding block to slide is arranged on the mounting rack; a synchronous belt is arranged between the first synchronous wheel and the second synchronous wheel, and a first servo motor used for driving the second synchronous wheel to rotate is arranged on the bottom face of the mounting frame. The test tube is placed in the synchronous belt, the first servo motor drives the second synchronous wheel to drive the synchronous belt and the second synchronous wheel to rotate, then the test tube is driven to move step by step, the electric push rod is started, the output shaft of the electric push rod pushes the upper portion of the test tube out of the synchronous belt, the sampling needle is inserted into the test tube, and automatic sampling is completed.

The utility model discloses an efficient atomic fluorescence generating device, and relates to the technical field of atomic fluorescence generating devices. The upper end of the side wall of the mixing cylinder is fixedly connected with an eduction pipe, a breather pipe and a connecting pipe are sequentially arranged below the eduction pipe and communicate with the mixing cylinder, the end, away from the mixing cylinder, of the eduction pipe is connected with combustion equipment, and the end, away from the mixing cylinder, of the breather pipe is connected with a fuel gas supply device. An atomization device is arranged on the side, away from the mixing barrel, of the connecting pipe. According to the device, the atomization device is arranged at the position of the connecting pipe, when the device is used, a sample is atomized by utilizing the atomization device, and the atomized sample directly enters the mixing cylinder, so that the problem that the sample is easily attached to the inner side wall of the gas guide pipe when an atomization machine is used in a traditional device is effectively solved, and the problem of waste of the sample is effectively avoided. And meanwhile, a mixing auxiliary mechanism in the mixing cylinder is used for fully mixing the fuel gas and the atomized sample, so that an auxiliary mixing effect is further achieved, and the mixing efficiency is improved.

The application discloses a fluorescence imaging device, a state detection system, an ion trap and a quantum computer. The fluorescence imaging device comprises a first imaging unit composed of a first objective lens and a parabolic mirror. The first objective lens converts the divergence angle of received atomic fluorescence. The parabolic mirror reflects and focuses the atomic fluorescence with the converted divergence angle to obtain imaging for state detection. The parabolic mirror reflects and focuses the atomic fluorescence, avoiding the problems of spherical aberration and chromatic aberration caused by the refraction of the atomic fluorescence in the lens group when the lens group is used to focus the atomic fluorescence. The parabolic mirror replaces the complex lens group, and the optical path composition of the fluorescence imaging device is simplified.

The utility model relates to the technical field of atomic fluorescence spectrometers, and particularly discloses an atomic fluorescence spectrophotometer drainage device which comprises a spectrophotometer body, a drainage pipe communicated with one side of the spectrophotometer body, and a drainage mechanism arranged at the tail end of the drainage pipe and used for collecting and storing drainage liquid, the liquid discharging mechanism comprises a supporting assembly arranged on one side of the photometer body, and a cleaning assembly used for treating discharged liquid is arranged in the supporting assembly. Through the arrangement of a supporting assembly and a cleaning assembly of the liquid discharging mechanism, after filtered discharged liquid enters a liquid storage barrel, the discharged liquid overcomes the supporting force of a spring to move downwards along with the increase of the overall weight of the liquid storage barrel, vertical movement is converted into rotation of a rotating barrel and a cleaning scraping piece through a power assembly, and the cleaning scraping piece stirs sediment at the bottom of the liquid storage barrel; after the flow guide holes in the upper side of the flow guide pipe are staggered and separated from the rotating cylinder, stored liquid in the liquid storage cylinder enters the flow guide pipe and flows out of the liquid outlet pipe, and the comprehensiveness of cleaning the bottom of the liquid storage cylinder is improved.

The utility model relates to the technical field of mercury measuring instruments, and provides a cold atom fluorescence mercury measuring instrument sealing structure which comprises a mercury measuring instrument body, a detection sealing buckle cover is arranged on the mercury measuring instrument body, a plug-in mounting sealing assembly is arranged on the mercury measuring instrument body, and a locking sliding assembly is arranged on the upper end face of the mercury measuring instrument body. The plug-in mounting sealing assembly comprises an operation opening, the operation opening is formed in the side wall of the mercury analyzer body, the detection sealing buckle cover is inserted in the operation opening, a horizontal plate is arranged at the upper end of the detection sealing buckle cover, a locking shaft is arranged on the bottom face of the horizontal plate, a locking disc is arranged at the bottom of the locking shaft, a locking block is arranged on the upper end face of the mercury analyzer body, and a locking opening is formed in the locking block. And the locking shaft is embedded into the locking opening. According to the technical scheme, the problems that in the prior art, voltage, a circuit and related parameters need to be adjusted when the mercury analyzer is used, the mercury analyzer needs to be opened for operation, the sealing performance at an operation opening of the mercury analyzer is poor, leakage is likely to happen, and dust enters the mercury analyzer are solved.

The utility model relates to the technical field of detection devices, in particular to a microwave digestion device for measuring organic selenium in animals by an atomic fluorescence method, which comprises a box body, the box body comprises a depressurization chamber and a digestion chamber, the depressurization chamber is separated from the digestion chamber through a partition plate, and a vacuum negative pressure pump is mounted in the depressurization chamber. A controller is arranged in the depressurization chamber, a touch screen is arranged at the front end of the depressurization chamber, the controller is in two-way signal connection with the touch screen, a microwave source is arranged at the top of the digestion chamber, a test tube tray is mounted at the bottom of the digestion chamber, and a chamber door is rotatably mounted at the front end of the digestion chamber; a door groove clamped with the chamber door is formed in the front end of the digestion chamber, a sealing ring groove is formed in the front end surface of the door groove, and a sealing ring is clamped in the sealing ring groove. According to the device disclosed by the utility model, the boiling point of a substance is reduced through uniform heating and a negative pressure environment provided by the microwave source, so that the digestion process can be carried out at a lower temperature, and the digestion efficiency of an animal sample is improved when organic selenium in an animal is measured by an atomic fluorescence method.

The invention provides a method for detecting mercury ions in wastewater, which comprises the following steps of: preparing a detection solution by taking a carbon quantum dot material as a detection reagent, mixing the detection solution with mercury ion solutions with different volumes to prepare a standard detection solution with gradient concentration, performing fluorescence test on the standard detection solution with gradient concentration, drawing a standard curve, and determining the mercury ions in the wastewater according to the standard curve. Mixing the detection solution with to-be-detected wastewater, detecting the absorbance of the to-be-detected wastewater, and calculating the concentration of mercury ions in the to-be-detected wastewater by using the standard curve. According to the method disclosed by the invention, detection can be completed by taking the quantum dots as an auxiliary detection reagent and adopting a fluorospectro photometer, so that the use of expensive detection equipment in inductively coupled plasma mass spectrometry and atomic fluorescence spectrometry is avoided, the detection cost can be effectively reduced, and the method also has the advantages of easiness in operation and high applicability.