380 results about "Atomic fluorescence" patented technology

The invention discloses an intelligent general type mercury measuring device and a detecting method of the intelligent general type mercury measuring device, three interfaces of a four-way valve (11) are respectively communicated with a solid, liquid and gas sample treatment devices (1), target gas output by the four-way valve enters into a mercury enrichment device (3) through a first three-way valve (2),the output end of the mercury enrichment device is communicated with the interface of a second three-way valve (4), the gas enters into an absorption pool (6) and is detected by a photoelectric detector (7); The three-way valve, the four-way valve, the absorption pool, the photoelectric detector and an excitation light source are controlled by a computer (8). The intelligent general typemercury measuring device is an opto-electro-mechanical integrated analysis device and measures the content of mercury by utilizing the mercury enrichment device and the atomic fluorescence technology, overcomes the disadvantage that only a single sample can be measured, can directly measure the solid sample, the liquid sample and the gas sample on the same device and can perform form analysis of mercury in the liquid sample and the gas sample, the intelligent general type mercury measuring device has high universality, high sensitivity, low detection limit and is simple in structure and is low in cost.

The invention relates to a determination method for inorganic arsenic in aquatic products. After being extracted by hydrochloric acid solution, the inorganic arsenic (1plus1) in the aquatic products passes through an anion-exchange column, and arsenite As (III), dimethyl arsenic compound DMA, methyl arsenic compound MMA and arsenate As (V) are eluted sequentially by mobile phase; owing to different adsorption capacities of the anion-exchange column on the arsenate As (V), the arsenite As (III), the methyl arsenic compound MMA, the dimethyl arsenic compound DMA and arsenic sugar AsS, the eluted solution is hydrogenated by borohydride potassium reducing agent and hydrochloride, and hydride is generated, enters an atomizer, and is subject to analytic determination by being combined with atomic fluorescence. The experimental condition is reasonably selected, and the detecting data is accurate and reliable and can not be influenced by extraction time and temperature. The determination method of inorganic arsenic in aquatic products of the invention not only can detect the inorganic arsenic iAs accurately, but also can determine the methyl arsenic compound MMA and the dimethyl arsenic compound DMA of the organic arsenic, and can be used for the morphometry of the arsenic in the aquatic products.

The invention relates to a direct sample introduction type method and a direct sample introduction type instrument for simultaneously measuring mercury and cadmium, which do not need to digest a sample. The direct sample introduction type method for simultaneously measuring mercury and cadmium comprises the steps of heating a sample in an aerobic environment, controlling the temperature in the scope from 120 DEG C to 500 DEG C, and separating most Hg and a decomposer out from the sample; loading Hg (mercury) and the decomposer into a catalytic furnace by an air flow to be further decomposed, absorbing Hg with Au, and keeping Cd (cadmium) be in the sample; putting the processed sample into a cracking furnace to be further thermally decomposed, and vaporizing Cd and residual H in the sample at a high temperature; loading the vaporized Cd and residual Hg into a Cd atom trap by argon, selectively trapping the Cd by a tungsten filament, and absorbing the residual Hg by a Hg trap; and heating the tungsten filament or a molybdenum filament and gold amalgamation in the argon and hydrogen gas to release Cd and Hg, and carrying Cd and Hg into an atomic fluorescence spectrometer by the argon and the hydrogen. On the basis of realizing the function of simultaneously measuring Hg and Cd, the direct sample introduction type method and direct sample introduction type instrument for simultaneously measuring mercury and cadmium have the advantages that the structure of the entire measurement instrument is simplified so as to miniaturize the instrument, so that the instrument can conveniently meet the requirements of the conventional analysis and emergencies, and can be carried to the field by a vehicle. Moreover, the direct sample introduction type method and the direct sample introduction type instrument for simultaneously measuring mercury and cadmium have application prospect in the field detection.

The invention discloses an electro-thermal vaporization atomic fluorescence spectrometry method and a spectrometer used for determining cadmium. An atomizer of the electro-thermal vaporization atomic fluorescence spectrometer comprises an atomizing apparatus and a collecting trap. The collecting trap is composed of a tungsten filament or a molybdenum filament, a support, a housing and a power source. A sealed space is formed by the housing and the support. The tungsten filament or the molybdenum filament is arranged on the support. The tungsten filament or the molybdenum filament is positioned in the sealed space formed by the housing and the support. An inlet and an outlet are arranged on the housing. The electro-thermal vaporization atomic fluorescence spectrometry method used for determining cadmium comprises steps that: a sample requiring testing is dried in air, and is cinerated, such that ash is obtained; under an argon atmosphere, the ash is heated to 1600 to 2000 DEG C, and the obtained vapor contacts the tungsten filament or the molybdenum filament; under an atmosphere of hydrogen and argon, the temperature of the tungsten filament or the molybdenum filament is increased to 1600 to 2000 DEG C, cadmium atoms are released, and the content of the cadmium atoms are analyzed by using a fluorescence spectrometry method. With the electro-thermal vaporization atomic fluorescence spectrometry method and the spectrometer used for determining cadmium provided by the invention, matrix interference can be effectively eliminated, and accurate measuring of cadmium can be realized.

The invention relates to a method for detecting a selenium form, elemental selenium and total selenium. Chromatographic separation systems and atomic fluorescence spectrophotometers in different instrument manufacturers are combined into a HPLC-HG-AFS system, and a method for analyzing the selenium form and measuring elemental selenium and inorganic selenium and total selenium in a sample can be performed. The measurement result is accurate; by measurement on the total selenium and inorganic selenium, the content of organic selenium can be indirectly obtained by adopting a method of subtracting the inorganic selenium from the total selenium, and a new technology for measuring the total selenium, inorganic selenium and organic selenium through a form analysis method can be formed. The method is high in portability and convenient and flexible to use and has high popularization and application values.

The invention discloses a method and a device for analyzing trace gaseous elemental mercury, and belongs to the technical field of atmospheric environment monitoring. In the method, the whole analysis process is controlled by a programmable logic controller. The method comprises the following steps of: arranging a mercury trapping tube collecting atmospheric gaseous elemental mercury (GEM) samples into a pyrolysis releaser for rapid heating, removing acid components carried by released HgO vapor from the released HgO vapor, introducing the HgO vapor into a secondary enrichment / pyrolysis releaser, and secondarily absorbing the HgO vapor by using the mercury trapping tube in the secondary enrichment / pyrolysis releaser; and rapidly heating the secondary enrichment / pyrolysis releaser, and blowing the secondarily pyrolyzed desorbed HgO vapor into a cold atomic fluorescence detector for quantitative detection by using a carrier gas. The device provided by the invention has a simple system, and is reliable in running; the atmospheric GEM samples collected by the mercury trapping tube are analyzed after being secondarily enriched, pyrolyzed and released so as to effectively reduce the limit of detection of the device and meet the requirements of trace analysis on the atmospheric GEM.

The invention relates to a solid sampling-non-dispersion atomic fluorescence photometer collocating device and an analyzing method. The device comprises a solid sampler, an integrated interface, a sample pipe, a peristaltic pump, a tee joint, a gas-liquid separator, a detector and a computer. The method comprises the following steps of: volatilizing an analyzing element in a volatile halide way and absorbing by absorption liquid by adding an auxiliary heat release agent or an ashing auxiliary agent in the solid sampler. The absorption liquid is introduced into a chemical steam generating system for reacting with potassium borohydride (sodium); and the generated volatile hydride or atomic steam is carried into an instrument atomization area for being detected by atomic fluorescence. The invention directly adopts solid sampling, rapidly realizes the detection of toxic elements, such as arsenic, stibium, selenium, mercury, and the like in the samples, such as geology, environment, food, biology, and the like and has the advantages of higher analyzing speed, low analyzing cost, high detecting sensitivity, high device portability, environmental protection, and the like.

The invention discloses a method for determination of the form of selenium in a selenium-rich plant material. The method provided by the invention is characterized by comprising the following steps of 1, a selenium-rich plant material pretreatment process comprising carrying out extraction of a crushed selenium-rich plant material sample by an extraction buffer Tris-HCl, after the extraction, adding cellulase into the extract, carrying out wall breaking of cells of the selenium-rich plant material sample, orderly adding effective amounts of protease K and protease XIV into the extract, and carrying out hydrolysis extraction to obtain a solution of a sample needing to be detected, and 2, carrying out determination processes respectively on a solution of selenium having a standard form and the solution of the sample needing to be detected by the combination of the hydride generation-atomic fluorescence spectroscopy technology and the high performance liquid chromatography. The method provided by the invention is simple, can be realized easily, adopts nontoxic reagents and does not produce pollution.

The invention relates to a detection method of selenium form in an aquatic product, and belongs to the technical field of aquatic product detection. The selenium form in the aquatic product is extracted by oscillating with a super constant-temperature mixer and measured by a high performance liquid chromatography-hydride generation atomic fluorescence spectroscopy combined morphological analysis technology, the extracting solution is separated by an anion chromatographic column, different forms of selenium are eluted successively by a moving phase, hydrogenation is carried out on the elution solution through a potassium borohydride reducing agent and hydrochloric acid to generate a hydride which enters an atomizer and is used in combination with atomic fluorescence for analysis and measurement, so that a more complete biological property of the selenium is provided. The experiment condition is reasonable, the detection data are accurate and reliable, the sample recovery rate is 88.79-94.88% and the degree of precision is less than 5%. The method is high in sensitivity, low in interference and simple in sample pretreatment, can be used for accurately measuring inorganic selenium, selenite and selenate as well as organic selenium, selenocysteine and selenomethionine and detecting selenium form in aquatic product.

The invention discloses a method for analyzing arsenic content in a glass refining agent, which comprises the following steps: processing samples by a potassium permanganate preoxidation-hydrofluoric acid wet digestion method to obtain a sample digestion solution; measuring the content of arsenic in the digestion solution by an inductance coupling plasma atomic emission spectrometry. By using potassium permanganate as a pre-oxidizing agent to carry out routine wet acid digestion on glass refining agent samples, the method can effectively avoid volatilizable loss of low-valent arsenic components in the preliminary processing of the samples, therefore, a routine inductance coupling plasma atomic emission spectrometer can be used to directly measure the content of the effective content-arsenic in the glass refining agent without allocating a hydride generator or an atomic fluorescence spectrometer. The method has the advantages of high operability, high analysis speed, high accuracy and favorable sensitivity and repetitiveness.

The invention provides a method of an atomic fluorescence spectrometry shape analysis by on-line pre-reducing trivalent arsonium and quinquivalent arsonium, the method comprises the following steps: (a) mixing a first arsenical sample and a first reducing agent under the temperature of 65-75 DEG C and performing a reduction of quinquivalent arsonium; (b) mixing a second arsenical sample and a second reducing agent, and determining the concentration of trivalent arsonium by the generated hydride after mixing; (c) mixing a solution obtained by reducing quinquivalent arsonium in the step (a) with the second reducing agent, and determining the concentration of total arsonium by the generated hydride after mixing. The invention also discloses an apparatus for using the method. According to theon-line pre-reduction of quinquivalent arsonium, the method of the invention is capable of effectively solving the interference problem between the valences, avoiding manual pre-treating processes inthe off-line reduction and realizing an automatic and rapid analysis of arsenic shape.

The invention relates to a detecting method for selenium speciation analysis in selenium-rich rice and particularly relates to a detecting method for organic selenium, protein selenium, polysaccharide selenium or RNA selenium in selenium-rich rice. The measuring method comprises the following steps of: (1) preparing a sample, namely sealing and storing selenium-rich rice flour to be detected for future use, wherein organic selenium is extracted through a dialysis method, and protein selenium, polysaccharide selenium and RNA selenium are respectively extracted; (2) measuring the selenium content through hydride atomic fluorescence spectrometry under measuring conditions that the negative high pressure is 340V, the lamp current is 100mA, the atomization temperature is 800 DEG C, the furnace height is 8mm, the flow rate of carrier gas is 500mL / min, the flow rate of shielding gas is 1000mL / min, the delay time is 1 second, the reading time is 10 seconds, the liquid adding time is 8 seconds, and the sample feeding volume is 2mL; and (3) data processing. The detecting method disclosed by the invention has the advantages of high sensitivity and accuracy and simplicity in operation.

The invention discloses an analysis method for determining arsenic in iron ore by using a hydride generation-atomic fluorescence spectroscopy. The method comprises the following steps of: preparing a sample solution of an iron ore sample, and preparing an arsenic standard solution; introducing the sample solution into an atomic fluorescence spectrophotometer, and determining the fluorescence intensity of the arsenic in the sample solution; and determining the content of the arsenic according to the fluorescence intensity which is determined on the basis of the arsenic standard solution with given concentration. By using the technical scheme disclosed by the invention, the content of the arsenic in the iron ore can be quickly and accurately determined.

The invention discloses a method for determining the arsenic, antimony and bismuth content of pure chromium by using atomic fluorescence spectrometry. The method comprises the following steps of: weighing a specimen; preparing a sample solution; preparing a calibration solution; drawing a working curve; measuring the concentrations of arsenic, antimony and bismuth in the sample solution; and calculating measurement results to obtain the arsenic, antimony and bismuth content. The method for determining the arsenic, antimony and bismuth content of the pure chromium is a hydride generation atomic fluorescence method, is high in analysis sensitivity, convenient to operate, short in analysis cycle and high in efficiency, has broad application prospect, and can be used for measuring the impurities arsenic, antimony and bismuth in the pure chromium which is a widely used raw material. Brazing performance can be greatly influenced by low-melting point impurity elements such as the arsenic, the antimony and the bismuth, and the like, and once the content of the elements exceeds a standard, the mechanical performance of materials can be greatly degraded, so that an accurate and reliable method is required by the measurement of the content of the elements. The requirements of scientific researches and production on control over the quality of raw materials are met, the rejection rate of the product is lowered, and development and production cost is saved.

The invention discloses a method for measuring trace heavy metal arsenic and lead in tobacco tipping paper, and in particular relates to a method for measuring the content of arsenic and lead in the tobacco tipping paper by using a calibrated atomic fluorescence spectrophotometer after the tobacco tipping paper is digested by nitric acid and sulfuric acid on an electric heating plate or in an electric furnace. The conventional method is simplified, the acid is not required to be driven repeatedly, sample treatment time can be saved, the interference of antimony and nickel elements in a detection result can be effectively eliminated, a tipping paper sample is quickly and efficiently measured, measuring accuracy is improved, and the method is a novel and applicable electric heating nitric acid digestion atomic fluorescence quantitative measuring method for the content of the arsenic and the lead in the tobacco tipping paper.

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

The invention provides a test method for organic mercury compounds, which comprises the following steps: first the organic mercury sample and separates the sample are extracted through high performance liquid chromatography, the mobile phase of which comprises:2-mercaptoethanol, one or more lower fatty acids and lower fatty acid salts, leads the chromatographic column draw off to cause chemical reaction under the ultraviolet light, the reaction solution is mixed with inert gases, the gas-liquid mixture is separated through a gas-liquid separator, the highly performance liquid chromatography chart is obtained through testing the separated sample gas phase through atomic fluorescence spectrometer; according to the standard curve between the organic mercury density and the peak area, the organic mercury concentration in the sample to be tested is figured out through the separated sample gas phase peak area in the highly performance liquid chromatography chart. The invention provides a separating and testing method for a plurality of organic mercury in the sample to be tested.

The invention discloses a process method for removing residual arsenic, lead and copper in soy protein isolate, which comprises the following steps of: by taking low-temperature low-degeneration bean pulp as a raw material, performing alkaline extraction and acid precipitation by taking 1 percent (weight in volume) solution of chitosan to obtain protein precipitate, adding water into the protein precipitate to prepare soy protein isolate liquid at the concentration of 10 to 15 percent (weight in weight), and homogenizing; and removing arsenic in the homogenized soy protein isolate liquid at the temperature of 20 to 30 DEG C when the pH value is 6.0 to 6.5, and performing absorption twice to remove lead and copper when the pH value is 6.5 to 7.0. In the method of the invention, after the soy protein isolate obtained by using the low-temperature low-degeneration bean pulp as the raw material alkaline and by extraction, acid precipitation and homogenizing is processed by absorption, analysis of the product by an atomic fluorescence spectrophotometer shows that: the arsenic content of the product is less than or equal to 0.008mg / kg and the arsenic adsorption rate is more than or equal to 99 percent; the analysis by an atomic absorption spectrophotometer shows that: the lead content is less than or equal to 0.006mg / kg and the lead adsorption rate is more than or equal to 99 percent; the analysis by the atomic absorption spectrophotometer shows that: the copper content is less than or equal to 3mg / kg and the copper adsorption rate is more than or equal to 75 percent; and thus, the edible safety of the soy protein isolate is improved.

The invention discloses a method for determining a selenium form in a selenium-rich egg, which is characterized by comprising the following steps: 1) pretreating the selenium-rich egg, using an extraction buffer Tris-HCl for extracting a sample of the selenium-rich egg, adding lipase for extracting if the selected selenium-rich sample is a yolk sample, then successively adding protease K and protease XIV with an effective amount for hydrolysis extraction to obtain a sample solution to be measured; directly and successively adding protease K and protease XIV with an effective amount hydrolysis extraction to obtain the sample solution to be measured if the selected selenium-rich egg sample is a egg white sample; 2) using combination of hydride generation-atomic fluorescence spectroscopy and high performance liquid chromatography for respectively determining a solution with a standard selenium form and the sample solution to be measured. The method of the invention is simple and easy to operate, the repeatability is good, and the used reagent has the advantages of no toxicity and no pollution.

The invention discloses a method for determining the content of selenium in soil by adopting a microwave digestion-atomic fluorescence technology. The method comprises the following steps: weighing a soil sample, putting the soil sample in a microwave digestion pot, sequentially adding a proper amount of nitric acid and hydrofluoric acid, shaking up, allowing the obtained solution to stand for 0.5h, and carrying out microwave digestion; carrying out acid removal treatment after the digestion; transferring the sample to a volumetric flask, adding a proper amount of concentrated HNO3, adding a solvent to a constant volume, and allowing the obtained solution to stand for above 5h; taking the obtained sample to a sample tube, sequentially adding 1ml of 100g / L K3Fe(CN)6 and 4ml of concentrated HCl, heating in a 90DEG C water bath for 0.5h, cooling, and testing by adopting an atomic fluorescence spectrophotometer; and making a serial standard curve, and corresponding the tested data to the serial standard curve in order to obtain the content of selenium in soil. The method adopting effective pretreatment of soil, reasonable reagent proportioning and apparatus parameter setting overcomes the defects of traditional selenium content determination methods, solves the soil matrix interference problem in determination, and can be used to accurately determine the content of selenium in soil.

The invention discloses a mercury morphological analysis method based on liquid cathode discharge and a mercury vapor generating device. The method comprises: a mercury-containing sample solution is introduced into a chromatographic column of a liquid chromatograph; a discharge medium carrier flow passes through a sample introduction device and is introduced into a sample introduction capillary tube of a discharge pool with the effluence of the chromatographic column through a tee joint; by taking a metal electrode as an anode, and graphite, platinum or a stainless steel material as a cathode, liquid cathode discharging is carried out to generate vapor which is carried by a carrier gas into a gas-liquid separator; and finally the separated gas is detected by an atomic fluorescence spectrometer to obtain the morphology of mercury. Through the method provided by the invention, organic mercury and inorganic mercury in an object to be detected are effectively separated and detected; and the method has the advantages of small volume, low energy consumption, high mercury vapor generation efficiency and low matrix interference, is simple in operation and can be used for analyzing the morphology of mercury in a biological sample.

The invention belongs to the technical field of feed quality detection, and particularly to a method for determining the selenium form in a selenium-rich feed, more particularly to a method for determining the selenium form in a selenium-rich feed by combining an ultrasonic probe-assisted enzymolysis technology and high-performance liquid chromatography-hydride generation atomic fluorescence spectrometry (HPLC-HG-AFS). According to the present invention, with the method, the content of the extracted selenium can be accurately determined, and the contents of the five forms of the selenium substances commonly contained in the selenium-rich feed can be effectively separated, such that the selenium form in the selenium-rich feed can be accurately analyzed, and the selenium-rich feed product can be rapidly and safely selected and used.

The invention provides a device and method for testing arsenic through an atomic fluorescence method. The device comprises a hydride generating device, a dielectric barrier discharging reactor, a power source, a gas circuit and an atomic fluorescence spectrometer. The method for testing an atomic fluorescence spectrometer pre-concentrated with arsenic comprises the steps that an arsenic hydride is generated, at the atmosphere of argon and oxygen mixed gas, the dielectric barrier discharging reactor performs a discharging reaction, and arsenic capture is completed; at the atmosphere of argon and hydrogen mixed gas, the dielectric barrier discharging reactor performs a discharging reaction, arsenic release is completed, and the content of the released arsenic is analyzed through the atomic fluorescence spectrometer. According to the device, the problem that capture and release of arsenic elements are not easily controlled by the dielectric barrier discharging device is solved, and the device has the advantage that online efficient concentration and accurate and stable analysis of trace amount arsenic in a sample can be achieved due to the fact that the device is directly connected with an optical spectrum instrument in series.

The invention discloses a method for measuring methyl mercury and ethyl mercury in animal flesh. The method is characterized by comprising the following steps of: pretreating an animal flesh sample; performing microwave-assisted extraction; analyzing through a liquid chromatography-atomic fluorescence combined instrument; and finally, collecting and processing the data by using a data processor, and measuring the content of methyl mercury and ethyl mercury in fish flesh. The microwave-assisted extraction and high performance liquid chromatography-atomic fluorescence spectroscopy (HPLC-AFS) method are simultaneously applied to detecting the methyl mercury and ethyl mercury in animal flesh, and an extraction process is optimized; according to selection and concentration control of mobile phase in chromatographic analysis and reasonable control on concentration of hydrochloric acid in atomic fluorescence analysis, selection of reducing agents and lamp current, the process flow is simplified, the content of methyl mercury and ethyl mercury in the animal flesh can be rapidly and simply measured, and the detection method is simple and fast in measurement and high in stability and has the characteristics of high measurement sensitivity, high accuracy and high interference resistance.

The invention discloses a method for indirectly measuring the content of uranium in soil through atomic fluorescence spectroscopy. The method is characterized in that the content of uranium is indirectly measured by measuring the content of arsenic; a complex is generated by utilizing uranium and certain arsenic-containing compounds which comprise but are not limited to arsenazo, and is separated from an original compound through a mode such as extraction, and the enriched complex subjected to separation is measured; and a standard working curve is made under the same condition and is compared so as to obtain the content of uranium by calculation. The method has the advantages that the method for indirectly measuring the content of uranium in soil through the atomic fluorescence spectroscopy is suitable for matrixes such as soil, water, coal and minerals. The method is simple and feasible, and compared with a conventional national standard method, the method according to the invention has the advantages that the used instrument is more common and is more applicable to analysis and research in a small lab.

The invention relates to a dispersive atomic fluorescence multi-channel simultaneous detection method based on a digital micromirror device (DMD). The method is based on a DMD-based dispersive atomicfluorescence detection system and is used for simultaneously detecting multi-channel atomic fluorescence, thus avoiding the influence of the different time detection of the atomic fluorescence on light intensity, reducing noise effect and improving stability; furthermore, the method can save target element solutions, and the target element solutions can be concentrated together so as to be detected. In a sample detection process, an excitation light source combination mode is determined according to the concentration of each element to be detected, and the elements to be detected are excited at the same time, so that the error caused by the difference of the concentrations of the different elements can be effectively avoided. According to the compensation coefficient of spectral peak fluorescence intensity, the spectral peak fluorescence intensities of the elements which are to be detected and have overlapping spectral peaks can be compensated, so that the problem of spectral peak absorption caused by spectral peak overlapping can be solved, and inter-channel interference is effectively avoided; therefore, the method can be used for accurately determining the actual contents of theelements to be detected and is high in detection accuracy.

The invention discloses an efficient liquid chromatogram-atomic fluorescence spectrum method for measuring mercury forms, and belongs to environment analysis technology. The efficient liquid chromatogram-flame atomization-atomic fluorescence spectrum-based method for measuring the mercury forms of methyl mercury, bivalent inorganic mercury, ethyl mercury and the like comprises that: after multiple mercury forms are separated by efficient liquid chromatogram, the mercury is mixed with acid and hydroboron in turn, the organic mercury is converted into hydrogenated organic mercury, the hydrogenated organic mercury is subjected to gas-liquid separation, mercury atoms are further converted in the argon-hydrogen flame, and the mercury is measured by adopting an atomic fluorescence spectroscope. A device for implementing the method comprises a liquid chromatogram pump, a chromatogram column, a peristaltic pump, a three-way valve, a gas-liquid separator, a flame atomizer, the atomic fluorescence spectroscope and a polytetrafluoroethylene tube. The method does not need to use strong oxidant such as potassium sulfate and the like after column treatment or use degradation equipment of ultraviolet, microwave and the like, has the advantages of simple instruments, convenience for operation and environment friendliness, and is suitable for form analysis of the mercury in environments and biological samples.

The invention discloses an optimization method for the parameters of an analytical instrument used for analysis of the forms of elemental arsenic based on an HPLC-HG-AFS system. The method comprises the following steps: optimization of high performance liquid chromatographic separation conditions; optimization of hydride generation conditions; and optimization of the parameters of an atomic fluorescence detector. Under the above-mentioned optimized conditions, three forms of arsenide, i.e., 4-aminobenzenearsonic acid, 4-hydroxy-3-nitrophenylarsonic acid and 4-nitrophenylarsonic acid respectively with a concentration of 0.1 to 2 [mu]g / mL are separately used for mixed-standard calculation of standard curves of the HPLC-HG-AFS system. Compared with the prior art, the method provided by the invention has good repeatability and high accuracy under the optimized conditions.

The invention relates to a method for simultaneously measuring arsenic and stibium in Chinese medicinal manyprickle acathopanax root. In recent years, hazards of heavy metal to the health and safety of a human body draw great attention of countries in the world and many countries raise strict requirement on the content of imported Chinese medicinal heavy metal. Heavy metal pollution of Chinese medicaments becomes a key barrier for the Chinese medicament to go to the world and enter international medicament market. The method comprises sample treatment which comprises the following steps: correctly weighing a sample to be measured of a manyprickle acathopanax root plant or a manyprickle acathopanax root series of product; putting the sample to be measured in a microwave digestion inner tank; adding digestion solution into the inner tank; putting the inner tank into an outer tank and sealing the outer tank; putting the outer tank into a microwave digestion system to perform digestion; cooling the outer tank; fixing the volume of the solution and pouring the constant volume solution into a 25 mL color comparison tube with a stopper into which 2.0 mL of hydrochloric acid and 2.0 mL of thiourea are added in advance; measuring by an atomic fluorescence method; and drawing working curves of the arsenic and stibium. The method is used for measuring the content of the arsenic and stibium in Chinese medicinal manyprickle acathopanax root.