81 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 invention provides an air purification system for atomic fluorescence, which relates to the field of air purification, and is characterized in that an air quality data packet is acquired and matched with a current optimal excitation wavelength combination, and then the air quality data packet is input into a light source driving module to generate a customized multi-wavelength mixed light field into a light reaction cavity. Meanwhile, original air flow is input into the light reaction cavity to obtain processed air flow, and candidate strategies closest to or most relevant to the current air quality characteristics are quickly found in a strategy semantic set in a purification strategy semantic dynamic query mode. And finally, a purification strategy, namely an optimal excitation wavelength combination, which most meets the current requirement is finally determined in a dynamic evaluation mode, so that intelligent control over a light source is achieved, and it is ensured that the system can provide the optimal purification performance in various complex air environments.

The invention relates to the technical field of determination of selenium in seawater, and provides a determination method for dissolved inorganic selenium in seawater. The determination method comprises the following steps: sampling seawater, filtering, adding concentrated hydrochloric acid with the mass concentration greater than or equal to 36%, carrying out a heating reaction at 98-105 DEG C for 12-18 min, cooling, and carrying out a constant volume to prepare a seawater sample to be detected: preparing a plurality of tetravalent selenium standard sample solutions according to gradient concentrations, drawing a standard curve, and testing the seawater sample to be detected. According to the method disclosed by the invention, seawater is treated by concentrated hydrochloric acid, excessive reduction of tetravalent selenium is avoided, a hydride generation-atomic fluorescence method is combined, and a heating reaction process is improved, so that the measurement of the dissolved selenium in the seawater is small in matrix interference, accurate in result, good in precision, high in sensitivity, low in detection limit, high in measurement speed and simple to operate.

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.

The water-carrying atomic fluorescence analysis device and analysis method of the present invention belong to the atomic fluorescence analysis in the field of analytical chemistry. The analysis device includes an infusion system with water as the carrier and an instrument body. The instrument body includes a shell and a reactor, an atomizer, an optical circle, an excitation light source, a detector, a circuit and gas circuit integrated system and a lamp position adjustment device assembled in the shell. Water is used as the carrier during the infusion process, and samples are introduced from the quartz furnace outer tube of the atomizer during the atomization process. The hydrogen flame is controlled to burn intermittently and the atomic fluorescence is detected synchronously to complete the detection. The device of the present invention is highly integrated and compact in structure, and is easy to assemble, adjust, operate and maintain. The analysis method of the present invention can effectively overcome the memory effect, improve the sensitivity and accuracy of the measurement, and break through the constraints of traditional atomic fluorescence analysis. It is an innovation in atomic fluorescence analysis technology.

The invention discloses a super microwave digestion and conversion rate determination method for organic arsenic in animal and plant samples, which comprises the following steps: adding a mixed solution of nitric acid and sulfuric acid into a sample, and performing digestion and cooling by adopting super microwaves to prepare a sample solution; the super microwave digestion conversion rate of the organic arsenic in the animal and plant samples is measured by using inductively coupled plasma mass spectrometry (ICP-MS) and hydride generation-atomic fluorescence spectrometry (HG-AFS). The method has the advantages of simple process, adoption of one-step digestion with super microwaves, no need of repeated acid addition, reduction of energy consumption and cost, short time of super microwave digestion, high conversion rate of super microwave digestion, facilitation of realization of rapid detection, and meeting of requirements of basic food detection.

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.

The invention discloses equipment for detecting the selenium content in selenium-rich plant drinks, and relates to the technical field of detection equipment.The equipment comprises an atomic luminoscope and a side seat arranged on one side of the atomic luminoscope, a storage frame and a side plate are fixedly installed on the side seat, and a rotating plate is rotatably installed on the side, close to the atomic luminoscope, of the storage frame; a liquid storage frame is fixedly mounted on the rotating plate, a partition plate is arranged in the liquid storage frame, and the bottom end of the liquid storage frame fixedly communicates with a liquid outlet pipe; the device further comprises an outer frame. The lifting rod is vertically mounted in the outer frame in a sliding manner, and a needle tube is arranged on the lifting rod; the vertical rod is horizontally installed in the outer frame in a sliding mode, and a bottom rod is fixedly installed at the bottom end of the vertical rod. Reagents are stored in advance through the liquid storage frame, the reagents are placed in a centralized mode through opening and closing of the partition plate, so that samples can be conveniently and rapidly prepared, meanwhile, when a luminoscope needle tube is used for sampling, the liquid storage frame can passively avoid, and therefore sampling is prevented from being blocked.

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 invention discloses a mercury form analysis system in the technical field of mercury form analysis. The mercury form analysis system comprises a trapping pipe (containing argon and Tenax filler), a pretreatment device, an automatic sample injector and a mercury form analyzer. The trapping tube receives the sample from which the interferent is removed. The mercury form analyzer comprises a shell, a first controller, a power supply and the like, and the thermal desorption module fixes a trapping pipe by using a first spiral nickel heating wire and is connected with the gas chromatographic separation unit through a gas guide pipe. The pyrolysis module comprises a quartz tube and a second spiral nickel heating wire, and is connected with the gas chromatographic separation unit and the cold atomic fluorescence detector. The first spiral nickel heating wire, the electronic flowmeter, the first electromagnetic valve and the like are all connected with a power source and are in electric signal connection with the first controller through the PWM control circuit. The first controller is used for controlling the operation of the gas chromatography separation unit and the cold atomic fluorescence detector and the heating temperature of the heating wire. The system can analyze the mercury form in the sample with high precision and high sensitivity.

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 relates to an atomic fluorescence spectrophotometer matching storage device which comprises a bearing plate, a box body, a cover plate and a locking part, the bearing plate is used for bearing an atomic fluorescence spectrophotometer, the box body is used for containing the bearing plate and the atomic fluorescence spectrophotometer, an opening is formed in the box body, and the locking part is arranged on the cover plate. The opening is used for moving the bearing plate and the atomic fluorescence spectrophotometer into or out of the inner cavity of the box body along the horizontal direction, the cover plate is used for sealing the opening, and the locking part is used for locking the cover plate on the box body. After the bearing plate and the atomic fluorescence spectrophotometer are horizontally moved out of the inner cavity of the box body, the height difference between the atomic fluorescence spectrophotometer and the table board is about the sum of the thickness of the bottom wall of the box body and the thickness of the bearing plate, and in the process that the atomic fluorescence spectrophotometer is horizontally moved out of one side of the bearing plate by hands, the height difference between the atomic fluorescence spectrophotometer and the table board is small. In the process of using the accommodating device matched with the atomic fluorescence spectrophotometer, the possibility that the atomic fluorescence spectrophotometer is broken can be reduced.

The present invention relates to the field of atomic fluorescence detection technology, and in particular to a single-photon-based atomic fluorescence excitation beam adjustment system and an adjustment method thereof. The system includes a sampling module, an atomization module, a light source excitation module, an electric displacement platform and a spectral imaging module. The sampling module is used to feed a sample into the atomization module, the atomization module is used to atomize the sample, the light source excitation module is used to excite the sample to produce an atomic fluorescence spectrum of a target element, the electric displacement platform is used to adjust the position of a light source in the light source excitation module, and the spectral imaging module is used to perform spectral imaging on the atomic fluorescence spectrum of the target element, and analyze the imaging data to adjust the light source to the optimal excitation position. The present invention combines the atomic fluorescence spectrum with the imaging of the flame excitation area, and can effectively adjust the excitation position to the optimal state, no longer relying on human eye observation and empirical judgment, and improving the accuracy of the detection result.

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.