177 results about "Erlenmeyer flask" patented technology

The utility model discloses an oscillation structure for pesticide residue detection, which comprises a collection tube, a conical flask, a base and an oscillation plate arranged above the base, and further comprises an integral loading mechanism which comprises an oscillation box, placing grooves which are uniformly distributed are formed in the top of the oscillation box, and a chassis is arranged at the bottom of each placing groove; the inner wall of the circumference of the containing groove is rotationally connected with a connecting rod, one end of the connecting rod is fixedly connected with a clamping rod, the portion, close to the middle, of the outer wall of the circumference of the clamping rod is fixedly connected with a first spring, and one end of the first spring is fixedly connected to the inner wall of the containing groove. The oscillation structure for pesticide residue detection provided by the utility model has the technical effects that the oscillation structure is suitable for collecting tubes with different diameters, the collecting tubes are prevented from toppling over, the conical flask is arranged on the limiting mechanism, a container can be independently fixed, a plurality of limiting mechanisms are arranged, oscillation detection can be simultaneously carried out, the oscillation time is saved, and the working efficiency is improved.

The invention discloses an extraction method of rose flavonoids, which comprises the following steps: S1, crushing selected dry Hetian rose buds, and storing for later use; s2, accurately weighing 1g of rose powder and putting the rose powder into a conical flask; s3, then, according to the material-liquid ratio of 1: 40, 40% ethanol is used as a solvent, and the materials are poured into a conical flask to be mixed; and S4, finally, soaking in a constant-temperature water area, extracting for 2 hours, and finally, taking supernate for later use. According to the invention, the solid-liquid ratio of 1: 40 ensures that the rose powder is fully infiltrated by an enough solvent (40% ethanol). Under the proportion, the ethanol can be in full contact with target components (such as flavonoid compounds and the like) in the rose powder. Each 1g of rose powder is surrounded by 40ml of solvent, so that target components have more opportunities to be dissolved out of powder particles to enter the solvent, and the extraction completeness can be improved compared with the condition that a feed liquid is relatively small.

A culture medium unsealing and transferring device relates to the field of container unsealing and comprises a moving plate, a supporting plate, a rotating plate, a rotating shaft and a rotating shaft, the unsealing mechanism is arranged on the supporting plate and comprises a moving frame moving in the length direction of the unsealing mechanism, a vertically-moving pressing plate is arranged on the inner side of the moving frame, a plurality of clamping rings are arranged on the pressing plate, a vertically-moving supporting frame is arranged above the pressing plate, a plurality of pressing blocks are arranged on the supporting frame, mucilage glue is arranged at the bottoms of the pressing blocks, and a plurality of hooks are arranged on the peripheral sides of the pressing blocks; the clamping mechanism is arranged at one end of the supporting plate and comprises a bearing frame which moves vertically and rotates around one side of the bearing frame, and a plurality of clamping rods are arranged on the bearing frame; the transfer mechanism is arranged at the other end of the supporting plate and comprises a rotating frame which is movably arranged in the length direction and the vertical direction of the rotating frame, a plurality of clamping blocks are arranged on the rotating frame in the length direction of the rotating frame and used for clamping the conical flasks, and the rotating frame rotates along the connecting line of the centers of the clamping blocks. According to the device, the conical flasks can be unsealed in batches, culture media in the conical flasks can be transferred, efficiency is improved, and the requirement for large-batch operation is met.

The utility model discloses a split charging device for producing a magnetic particle reagent. The split charging device comprises a speed-adjustable shaking table and a peristaltic pump, the shaking table comprises a base, a supporting plate is installed on the upper side of the base, a plurality of triangular flasks capable of containing magnetic particle reagents are installed on the upper side of the supporting plate, the supporting plate is provided with supporting tables corresponding to the triangular flasks, the supporting tables are provided with clamping arms for clamping the triangular flasks, and arc-shaped clamping pieces are installed at the ends of the clamping arms and abut against the side walls of the triangular flasks for clamping. A prepared magnetic particle reagent to be subpackaged is placed on a supporting table and fixed through a clamping arm, a disposable clean hose is used for communicating a reagent bottle with a peristaltic pump, parameters such as the flow speed, the volume and the interval time of the peristaltic pump are adjusted, after debugging is completed, a horizontal shaking table is started for gentle and uniform mixing, and the peristaltic pump is started after complete uniform mixing. And constant subpackaging can be carried out downstream according to set subpackaging parameters, and human intervention on the device is not needed in the midway.

The invention relates to a mercury content detection method, and relates to the technical field of mercury detection. According to the mercury content detection method, the to-be-detected sample is preliminarily quantified by using the X-ray spectrometer, the mercury content range of the to-be-detected sample can be quickly obtained, the to-be-detected sample is weighed according to the preliminarily measured mercury content, and the accuracy and reliability of subsequent detection can be guaranteed. By means of constant-temperature water bath heating, it can be guaranteed that a sample to be detected is completely decomposed, meanwhile, a solution in the cover type funnel is poured back into the conical flask, mercury compounds volatilized after heating can be collected, mercury content loss is avoided, and the stability and accuracy of subsequent detection results are further guaranteed. The mercury standard solution is prepared, the inductively coupled plasma emission spectrometer is used for detection, manual titration operation is not needed, the anti-interference capability is good, the mercury content can be accurately measured, and the stability and accuracy of a detection result are effectively guaranteed.

The utility model discloses a COD (Chemical Oxygen Demand) digestion device, relates to the technical field of water quality detection instruments, and solves the problems that when the existing COD digestion device is not used, a conical flask and a return pipe are usually directly placed on the COD digestion device, no protective device is arranged outside the conical flask and the return pipe, and external dust directly falls on the device when the conical flask and the return pipe are placed for a long time, so that the subsequent use is influenced. According to the technical scheme, the problems that a conical flask, a backflow pipe and other glassware are damaged due to the fact that the conical flask and the backflow pipe are easily touched by mistake, and using is inconvenient are solved, the device comprises a groove body, two L-shaped supports and a main machine body, the two symmetrical L-shaped supports are fixedly installed on the upper surface of the rear side of the groove body, and the bottom of the main machine body is fixedly connected with the top planes of the L-shaped supports. According to the utility model, through the matching design of the two L-shaped protective plates and the back plate, the conical flask and the return pipe in the COD digester are sealed and shielded, so that external dust is not easy to directly fall on the conical flask and the return pipe, and the follow-up use is facilitated.

The utility model provides a strain fermentation tank inoculation device which comprises a barrel and a flame ring, the barrel can be arranged on an inoculation opening in a sleeving mode, a sleeve is fixed to a fermentation tank, a net ring is fixed to the inner wall of the barrel, the flame ring is annularly fixed to the upper end of the net ring, and a conical cover integrally formed with the barrel is arranged at the upper end of the barrel. The top of the conical cover is provided with a through hole capable of pouring bacterial liquid for inoculation through the conical flask. According to the inoculation device for the strain fermentation tank, when a flame inoculation method is used for strain inoculation, flames generated by igniting the flame ring are limited in the barrel, the effects that the flames cover the inoculation opening to keep a sterile environment and prevent infectious microbes from entering the fermentation tank are achieved, diffusion of surrounding flames is limited through the barrel and the conical cover, and the inoculation effect is improved. And the risk that operators are scalded is reduced.

The invention discloses a method for carrying out nine-fold breeding by utilizing female gametes, and relates to the technical field of biological breeding. Comprising the following steps: step 1, pollinating hexaploid persimmon pollen to a'rattan royal house 'containing 2n eggs; 2, collecting young fruits which are born for 65-70 days after pollination, stripping seeds, putting the seeds into a sterilized triangular flask, treating the seeds for 30 seconds in an ultra-clean workbench by using 70% ethanol, pouring out the seeds, adding a 1% NaClO solution, soaking the seeds for 10 minutes, and shaking the seeds once every 3-4 minutes. According to the method for carrying out nine-fold breeding by utilizing female gametes, in persimmon breeding, compared with a 2n pollen path, the 2n egg path is higher in feasibility, 2n eggs and complete male germplasm with good pollen traits are hybridized, pollination populations are expanded, and polyploidy seedless materials can be obtained.

The invention discloses a rapid detection and on-site treatment method for ammonia and black oil in fly ash, which comprises the following steps: 1) weighing 200g of fly ash from the batch of fly ash, putting the fly ash into a conical flask, adding 80g-90g of water for stirring, and stirring; (2) after stirring is completed, covering a conical bottle opening with test paper soaked with a 1% phenolphthalein alcohol solution; 3) if the test paper turns red, determining that ammonia with relatively high content exists; 4) standing for 8-10 minutes, and observing whether black oil exists on the surface of the neat paste; 5) after the detection is completed, treating excessive ammonia and black oil in the fly ash; according to the present invention, the ammonia content is rapidly detected by using the test paper impregnated with the 1% phenolphthalein alcohol solution, the black oil is observed by standing, and the concrete stirring and vibrating process is combined so as to achieve the real-time determination and the emergency treatment of the fly ash pollutants, such that the concrete structure quality is improved, and the fly ash field detection method is supplemented.

An oval conical flask titration clamp comprises a first clamp body, a second clamp body and an elastic connecting piece, and the first clamp body and the second clamp body are connected to the two ends of the elastic connecting piece respectively. The first clamp body, the second clamp body and the elastic connecting piece are arc-shaped, and the inner arc surface of the first clamp body is opposite to the inner arc surface of the second clamp body. The first clamp body and the second clamp body are made of wood, bamboo or plastic, the inner cambered surface and the outer cambered surface are rough surfaces, and the elastic connecting piece is made of metal. According to the titration clamp disclosed by the utility model, the first clamp body, the elastic connecting piece and the second clamp body form an approximately elliptical shape which is matched with the shape formed by the thumb, the jaw and the index finger of a human hand, so that the human hand can firmly and stably grasp the titration clamp and clamp a conical flask. And the first clamp body and the second clamp body are made of wood, bamboo or plastic, so that a heat insulation effect can be achieved, an experimenter is prevented from being scalded, and the titration clamp is suitable for titration analysis operation after heating.

The utility model relates to the technical field of physical and chemical inspection, and discloses a titration assembly for physical and chemical inspection, which comprises a base, mounting plates are fixedly connected to the left side and the right side of the upper part of the base, a mounting groove is formed in the middle of the base, chutes are formed in the lower parts of the opposite sides of the mounting plates, and stirring assemblies are arranged in the chutes. And the upper parts of the opposite sides of the mounting plates are fixedly connected with electric telescopic rods, and the opposite sides of the electric telescopic rods are provided with mounting assemblies for mounting the titration assemblies. According to the titration assembly, through the cooperation of the valve, the burette, the conical flask, the magnetic stirring device, the magnetic stirring rotor, the air cylinder, the supporting plate and other structures, liquid medicine and titration liquid can be fully stirred when the titration assembly is used for detecting the phlegm reducing liquid medicine, and the accuracy of detecting the phlegm reducing liquid medicine is improved.

The utility model provides a novel funnel type body fluid sample bottle for collecting and storing body fluid samples, which comprises a bottle body, the top of the bottle body is in threaded connection with a wide-mouth bottle cap, the bottle body comprises a cylindrical bottle body and a conical bottle body, the cylindrical bottle body is connected with the conical bottle body, the cylindrical bottle body is positioned above the conical bottle body, and the conical bottle body is positioned above the conical bottle body. The bottom of the conical flask body is connected with a return pipeline, an annular protrusion is arranged on the inner side of the lower portion of the cylindrical flask body, a supporting frame is arranged below the cylindrical flask body, and the supporting frame is connected or connected to the outer side of the conical flask body in a sleeved mode. The novel funnel-type body fluid sample bottle for collecting and storing the body fluid sample is simple in structure, the wide-mouth bottle above the bottle body is used for collecting body fluid, the lower portion of the bottle body is funnel-shaped, deposition and centrifugation of visible components are facilitated, the bottom of the conical bottle body is connected with the sample outlet through a return pipeline and is controllable and normally closed, operation is simplified, and the bottle is convenient to use. The opportunity that an operator is in contact with the contents to pollute the contents can be avoided, and the concentration of liquid particle components at the lower part is improved.

The invention discloses a method for determining the content of amylose and amylopectin in corn through a full-automatic flow injection analyzer method, and particularly relates to the field of determination of the content of amylose and amylopectin in corn, the method comprises the following steps: taking a corn kernel sample, crushing into powder, and passing through a 80-mesh screen to obtain corn kernel sample powder; the corn kernel sample powder is subjected to reflux extraction degreasing through a degreasing agent, and a degreased corn kernel sample is obtained; the method comprises the following steps: weighing a degreased corn kernel sample, putting the degreased corn kernel sample into a conical flask, adding a 95% ethanol solution, transferring a sodium hydroxide solution into the conical flask, and heating the conical flask in a boiling water bath for 10 minutes to obtain a to-be-detected corn sample with starch dispersed; taking out the to-be-detected corn sample, cooling to room temperature, transferring into a volumetric flask, adding distilled water to a constant volume, shaking uniformly, analyzing by a flow injection analyzer, and calculating to obtain the content of amylose in the corn sample. The method has the advantages of high automation degree, high detection speed and simple sample treatment.

The utility model discloses a reaction device for preparing a molecular fluorescent probe, which comprises a support plate, an adjusting rod fixedly connected to the outer surface of the top of the support plate, a moving ring slidably connected to the outer surface of the adjusting rod, a funnel sleeved in a limiting ring, a connecting pipe fixedly connected to the bottom of the funnel, and a conical flask arranged below the connecting pipe. The conical flask is placed above the supporting plate; a positioning frame is fixedly connected to the upper surface of the fixing ring, a fixing block is slidably connected to the interior of the positioning frame, a positioning block is rotatably connected to the fixing block, a torsional spring is arranged between the positioning block and the fixing block, and a limiting plate is fixedly connected to the outer surface of the upper portion of the positioning block. According to the reaction device for preparing the molecular fluorescent probe, the positioning block is pressed on the outer surface of the filter paper, so that the position of the filter paper can be fixed, the filter paper cannot move under the driving of the glass rod when a user conducts drainage and filtration, and then liquid is prevented from moving into filtrate from the edge of the funnel; therefore, the purity of the interior of the filtrate is relatively high.

This invention discloses an extremely salt-tolerant halophilic bacterium, HD16, which can grow under extreme salinity conditions up to 4.0 M sodium chloride (approximately 230 g / L sodium chloride) and also exhibits high alkalinity tolerance, surviving at pH 7–11. Therefore, it is predicted to have broad application prospects in wastewater treatment and other fields. Furthermore, it can be used to produce polyhydroxyalkali (PHA). When cultured in a 500 ml Erlenmeyer flask, the cell dry weight yield reaches 9.45 g / L, with PHA accounting for 72.97% of the bacterial dry weight. The extreme salt tolerance and high alkalinity tolerance of this strain enable it to efficiently accumulate polyhydroxyalkali esters under open, non-sterile conditions.

The utility model relates to the field of malt physicochemical index detection, and discloses a distillation extraction device for detecting peat phenol value in peat malt, which comprises a support II, a support I and an electric jacket, the outer side of the support II is fixedly connected with a bottom support, the middle part of the bottom support is provided with a condenser pipe, the inside of the condenser pipe is fixedly connected with a coiled pipe, and the coiled pipe is fixedly connected with the support I; a distiller is installed on the outer side of the first support through a chain clamp, a distiller cover is installed on the top of the distiller, a water outlet and a water inlet are sequentially and fixedly connected to the outer side of the condensation pipe from top to bottom, and a conical flask is arranged under the coiled pipe. According to the utility model, the technical scheme of a distillation condensation mode is adopted, so that total phenols in malt can be continuously and uniformly collected. According to the scheme, the whole collection process does not exceed 20 minutes, and the distillation water can be continuously supplemented, so that the efficiency is greatly improved. Compared with the problems of low collection efficiency and complex operation in the prior art, the scheme greatly simplifies the experimental process and improves the overall working efficiency.

The utility model provides a titration device for medicine detection, which belongs to the technical field of titration detection and comprises a clamping mechanism arranged in an inner cavity of a base, a pull rope fixedly connected to one end of a pull rod, a winding disc arranged at the other end of the pull rope, a first bevel gear fixedly connected to the bottom of the winding disc, and a support shaft fixedly mounted at the bottom of the first bevel gear, the torsional spring and the first bevel gear are arranged on the outer surface of the supporting shaft in a sleeving mode, the supporting shaft rotates, the first bevel gear drives the second bevel gear, the rotating shaft and the spiral guide roller which are meshed with the first bevel gear to rotate, and the first bevel gear moves left and right on the surface of the spiral guide roller along with rotation of the spiral guide roller to drive the clamping rod to clamp the conical flask. According to the utility model, the conical flask can be effectively clamped and fixed through the matching of all parts between the clamping mechanisms, and the problems that the conical flask is easy to turn over or slide down due to the fact that the conical flask cannot be fixed during titration in the prior art, so that personnel need to prepare materials again, time and energy are wasted, and the working efficiency is delayed are solved.

The invention relates to a method for detecting the content of white oil in polystyrene, which is applied to the field of polystyrene resin detection and comprises the following steps: S1, weighing a polystyrene sample, putting the polystyrene sample into a conical flask with a plug, adding methylbenzene into the conical flask with the plug, and oscillating and dissolving; s2, putting the conical flask with the stopper into a warm water bath, and meanwhile, adding a precipitator into the conical flask with the stopper to precipitate a polymer; s3, adding a precipitant while shaking when the precipitant is dropwise added, and quickly cooling after the precipitant is completely precipitated; s4, filtering by using suction filtration equipment, collecting the filtered solution, concentrating to obtain a concentrated sample solution, and weighing the concentrated sample solution; and S5, sucking a proper amount of concentrated sample liquid by using a microsyringe, then injecting the concentrated sample liquid into a chromatographic instrument, and determining, by accurately controlling precipitation conditions and a separation process, the problems of white oil wrapping by precipitation, filter membrane blockage and insufficient detection limit in a traditional method are solved, and high-precision and high-repeatability white oil content detection is realized.

The utility model relates to an improved nitrogen distillate absorption device, which comprises a distillation flask, a splash-proof ball tube, a guide tube, a condensing tube and a conical flask with double connecting balls which are connected in sequence, and a dropping funnel is arranged between the distillation flask and the splash-proof ball tube, and is characterized in that the distillation flask is provided with a temperature control device, the guide tube is U-shaped, and the condensing tube is arranged in the conical flask. The conical flask with the double connecting balls is connected to the lower end of the condenser pipe, and the opening of the conical flask with the double connecting balls is S-shaped. The gas absorption and titration device is simple, clear and accurate, and solves the problems that in the prior art, the heating temperature is too high, the temperature control is unstable, and the heating is not uniform; the gas flow speed is too high, so that the absorption is incomplete; the solution absorbed by the conical flask is easy to splash out, and system errors are easy to generate, so that the test is accurate.

A cooking disinfection frame comprises a base plate, a plurality of supporting legs are arranged on the base plate, a plurality of air holes are formed in the base plate, the supporting legs serve as supporting parts, the lower ends of the supporting legs are placed at the lower end of a cooking pot, and the air holes can enable water vapor to penetrate through and disinfect appliances. A plurality of vertically arranged vertical rods are arranged on the base plate, connecting rods are arranged at the upper ends of the vertical rods, the connecting rod located at the lower end is connected to the lower end of the vertical rod located at the upper end, a plurality of outward extending rods are arranged on the vertical rods, a plurality of vertical rods are arranged on the outward extending rods, and when appliances such as beakers and conical flasks are placed, the vertical rods can be arranged in the appliances in a penetrating mode. The vertical rods are used for supporting the appliances, and the openings of the placed appliances face downwards, so that steam can conveniently enter the appliances, and the inner walls of the appliances can be conveniently disinfected. Meanwhile, after being placed, the appliances are arranged at intervals, so that the appliances are prevented from being damaged during transferring.

The invention provides a traditional Chinese medicine extract detection method, and relates to the field of extract detection. Comprising the following steps: S1, precisely weighing M1 g of a test sample, and adding the test sample into a conical flask; s2, adding 100 mL of an ethanol solution into the conical flask, and sealing the conical flask opening; s3, preliminarily shaking up the solution system in the conical flask, then fixing the conical flask on an oscillator, setting the oscillation time to be 6 hours and the frequency to be 120 Hz, and then standing for 18 hours; s4, filtering the solution system in the conical flask, and precisely measuring 20mL of filtrate; s5, drying the evaporation dish to constant weight, weighing the weight of the evaporation dish, and recording the weight as M4; adding the filtrate weighed in the step S3 into a dry evaporation dish, drying to constant weight, and recording as M5; and S6, calculating the content of the extract in the test sample. According to the detection method, the cost of inspection personnel is effectively reduced, the inspection efficiency is improved, personnel errors can be effectively reduced, and the time utilization rate of inspection is improved.

The invention discloses a method for detecting Fe < 2 + > and Fe < 3 + > in a zinc plating solution, which comprises the following steps: putting a zinc plating solution test solution into a conical flask, then adding hydrochloric acid and a copper sulfate solution, heating, taking down and slightly cooling to obtain a test solution; adding an isatin indicator into the test solution, uniformly shaking, then dropwise adding a titanium trichloride solution until the test solution becomes yellow from blue green, adding excessive titanium trichloride solution after the test solution is stable, adding distilled water, cooling, standing, adding sulfuric acid-phosphoric acid mixed acid after the test solution is obviously blue, then dropwise adding a sodium diphenylaminesulfonate indicator solution, and uniformly shaking; titrating with a potassium dichromate standard titration solution until the test solution is purple, and calculating to obtain the total iron content; and measuring the content of Fe < 2 + >, and calculating the concentration component of Fe < 3 + > according to the total iron content and the concentration component of Fe < 2 + >. The concentration of Fe < 2 + > and Fe < 3 + > can be monitored in real time, anode passivation is prevented, the production quality is controlled, the operation is convenient, the test time is short, and the accuracy of an analysis result is high.

The utility model discloses a conical flask for water quality inspection, which comprises a base, a first heating assembly, a second heating assembly and a conical flask body, and the first heating assembly is arranged on the base and is used for heating the bottom of the conical flask body; the second heating assembly is detachably arranged on the base and used for heating the outer side wall of the conical flask body, and a heat preservation area used for preserving heat of the conical flask body is formed between the second heating assembly and the base; and a turbulent flow bulge is inwards formed on the inner side wall of the conical flask body. The conical flask for water quality inspection is reasonable in structure, high in mixing efficiency, high in heating efficiency and stable in heating temperature.

The invention discloses a preparation method of polydivinylbenzene hollow microspheres based on sulfydryl-alkene click reaction, which comprises the following steps: adding n-amyl alcohol into a conical flask, putting into a water bath kettle, stirring, adding polyvinylpyrrolidone, absolute ethyl alcohol, ammonia water and deionized water to form a reversed-phase microemulsion system, adding tetraethyl silicate, stirring, filtering, washing, and drying to obtain the polydivinylbenzene hollow microspheres based on sulfydryl-alkene click reaction. Oscillating and shaking, standing, and centrifugally cleaning; absolute ethyl alcohol and deionized water are added, the water bath kettle is heated to 80 DEG C, trimethoxysilane is added for a reaction, and then centrifugal cleaning is conducted; then, absolute ethyl alcohol, polyvinylpyrrolidone, azodiisobutyronitrile, divinylbenzene and deionized water are added; heating and stirring in a water bath kettle, adding a NaOH solution, and centrifuging to obtain the polydivinylbenzene hollow microspheres. The PDVB hollow microspheres with different cavity sizes are successfully prepared by adjusting and controlling the size of the template, and the method has the advantages of good selectivity, high yield and the like, and provides a new way for preparing the high-performance hollow microspheres.

1. The name of the design product: conical bottle. 2. The use of the design product: bottle for carrying drinking water outside. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

This invention discloses a method for detecting hydrogen deuteride after water-hydrogen isotope liquid-phase catalytic exchange. The apparatus used in this method includes a first Erlenmeyer flask, a metering pump, a catalytic exchange bed, a flow meter, and a time-of-flight mass spectrometer. The detection process is as follows: a mixture of heavy water and purified water is filled into the first Erlenmeyer flask; a hydrophobic catalyst and hydrophilic filler for the isotope exchange reaction are filled into the catalytic exchange bed; the mixed water enters the catalytic exchange bed from the top and undergoes an isotope exchange reaction with hydrogen gas entering from the bottom of the bed; the deuteride gas after the exchange reaction is directly introduced into the time-of-flight mass spectrometer for detection via the flow meter. This method can monitor the changing trend of deuteride gas after water-hydrogen isotope liquid-phase catalytic exchange online. Simultaneously, the performance of the catalyst, the packing ratio, and the packing method can be examined, thereby further guiding the process. This method features fast analysis speed and high sensitivity.

The utility model discloses an H2S precipitation test device capable of detecting pH-electrode potential on line. The H2S precipitation test device comprises a sulfuric acid dropwise adding system; a sulfuric acid adding port of the H2S gas preparation system is connected with the sulfuric acid dropwise adding system; a gas input port of the H2S precipitation system is connected with a gas output port of the H2S gas preparation system; the residual H2S absorption system is connected with a tail gas outlet of the H2S precipitation system; the device further comprises a pH-electrode potential detection system. The pH-electrode potential detection system comprises a second peristaltic pump, and the inlet end of the second peristaltic pump is connected with a guide pipe arranged in the H2S precipitation system; a guide pipe in the third conical flask is connected with the outlet end of the second peristaltic pump; and the detection end of the pH-electrode potentiometer is arranged in the third conical flask.

The invention discloses a pretreatment method for detecting an active substance epicafucatechin in radix ephedrae formula granules. The pretreatment method comprises the following steps: (1) crushing and sieving the radix ephedrae formula granules, and collecting screen underflow; (2) putting a proper amount of crushed ephedra root formula granules into a conical flask with a plug, adding ultrapure water, performing ultrasonic extraction in an ultrasonic machine, standing to room temperature, adding water to complement the weight, and filtering to obtain a filtrate; (3) extracting a proper amount of filtrate with water-saturated n-butyl alcohol, and combining extract liquor; and (4) evaporating the n-butyl alcohol extract to dryness, dissolving residues with methanol, metering the volume in a 10mL volumetric flask, and filtering to obtain a sample to be detected. The method can effectively guarantee the detection stability and accuracy of the active substance epialfallocatechin in the Chinese ephedra root formula granules.

The invention discloses a biological treatment method for triphenylmethane dye wastewater, and belongs to the technical field of biological sewage treatment. The dye is removed by utilizing the self-assembled biological particles through biological adsorption and biological transformation, and the preparation method of the self-assembled biological particles comprises the following steps: inoculating a certain amount of aspergillus niger spore suspension into a liquid culture medium in a conical flask, culturing for 3-4 days in a shaking table to form mycelium pellets, adding a certain amount of activated sludge, and uniformly stirring to obtain the self-assembled biological particles. And continuously culturing in the shaking table for 1-2 days to form the self-assembled biological particles. And adding the prepared self-assembled biological particles into triphenylmethane dye wastewater with a certain concentration, and reacting in a shaking table for 8 hours. The method effectively solves the problem that the triphenylmethane dye wastewater is difficult to biologically remove, provides an economical and efficient biological treatment technology for the wastewater, and has wide application prospects in treatment of explosive, pesticide, medicine and dye wastewater.

The invention discloses an adsorption column connecting mechanism for an activated carbon dynamic adsorption experiment, and relates to the technical field of adsorption experiments, the adsorption column connecting mechanism comprises an ultrasonic oscillator and a conical flask, the ultrasonic oscillator is internally provided with a fixer for fixing the conical flask, the fixer is internally provided with the conical flask, and the conical flask is connected with the ultrasonic oscillator. A first rubber plug is arranged at a bottle opening of the conical bottle, a conveying pipe is fixedly mounted in the first rubber plug, and low-cost and standardized experimental equipment is modularly assembled (commercially available glass tubes are utilized to construct an adsorption column main body, a silica gel tube is utilized to realize directional transmission of fluid, and the silica gel plug and a sand core are combined to form a detachable sealing structure); in combination with flexible filling of universal fillers such as quartz sand and activated carbon, an innovative fluid path of flowing from bottom to top is constructed, and the risk that fine-particle fillers in a traditional device block a sand core is thoroughly avoided (under the same condition, a bottom-to-top flowing mode can prolong the continuous operation time of the device to more than 5 times that of a traditional top-to-bottom mode).