36 results about "Sample viscosity" patented technology

A method for differentiating between a liquid sample having clogs therein and a liquid sample having an abnormally elevated viscosity during a liquid aspiration process by relating the ratio between the maximum negative pressure during aspiration and an equilibrium pressure prior to dispensation to viscosity.

An apparatus and methods for analysis of a petroleum product, specifically determining the viscosity of a sample, are disclose. The apparatus includes a sample reservoir for receiving a liquid sample and a pressure regulator for applying hyperbaric pressure to a sample within the reservoir. When pressure is applied to the sample reservoir, the sample is forced through a passageway and a pressure sensor monitors the pressure in the sample reservoir. A drop in the pressure can be used to determine when the reservoir is empty and sample viscosity can be calculated based on the time required to empty the reservoir.

The invention discloses a nuclear-magnetic-resonance-technology-based method for detecting transformer oil ageing state parameters. The ageing state parameters comprise oil sample viscosity, oil sample density, oil sample furfural content, oil sample resistance and the like. The method comprises the following steps: performing nuclear magnetic resonance spectrum analysis on a solution gas-containing transformer oil sample and detecting the parameters, wherein the oil sample viscosity eta is measured through the formula shown in the abstract, T1 and T2 respectively refer to longitudinal/transverse relaxation time of the oil sample, T1 is measured by an inversion recovery method, T2 is measured by a CPMG method, the oil sample density and the other parameters are measured by measuring the content of CHn functional groups in the oil sample by utilizing a two-dimensional J-resolved spectroscopy nuclear magnetic resonance analysis method according to a relation model between the content of functional groups and the oil sample density and other parameters; and n in the CHn is equal to 0, 1, 2 and 3. The method has the advantages of few sample quantity, simple and direct sampling process, high analysis speed, high analysis accuracy and the like.

An x-ray analysis system having an x-ray engine with an x-ray source for producing an x-ray excitation beam directed toward an x-ray analysis focal area; a sample chamber for presenting a sample stream to the x-ray analysis focal area, the analysis focal area disposed within a sample analysis area defined within the chamber; an x-ray detection path for collecting secondary x-rays and directing the x-rays toward a detector; an x-ray transparent barrier on a wall of the chamber through which the x-rays pass; and a blocking structure partially blocking the sample analysis area, for creating sample stream turbulence in the sample analysis area and over the barrier. The blocking structure may be disposed asymmetrically about a central axis of the x-ray analysis focal area and/or the sample analysis area; and may be a rounded pin. A heating element may be used to heat the sample stream for improving flow.

A composition is disclosed, comprising, based on the total weight of the composition, a combination of from 44 to 80 weight percent of a thermoplastic poly(butylene terephthalate); from 20 to 50 weight percent of a thermoplastic poly(ethylene terephthalate) having an intrinsic viscosity of 0.5 to 0.8 deciliters per gram, measured in a 60:40 by weight phenol/1,1,2,2-tetrachloroethane mixture at 23° C. using a relative viscometer operating with a closed loop system, which measures the solvent and sample viscosity simultaneously; from 5 to less than 20 weight percent of a talc filler having an average largest dimension of less than 0.9 micrometers, a median particle size of less than 0.9 micrometers, or both; and from 0.1 to 0.5 weight percent of a mold release agent. The compositions are useful in the manufacture of lighting articles, which can be directly metallized without the inclusion of a base coat.

The invention relates to clinical immunodiagnosis reagents and preparation methods thereof, and discloses a colloidal gold immunofiltration quantitive detection reagent kit and a method for detecting antigens and antibodies by colloidal gold immunofiltration quantitive detection. One or two quality control lines or points which contain known to-be-detected substances are added on the colloidal gold immunofiltration quantitive detection reagent kit. In one reaction, change of color developing degree of detection lines (points) is relevant with change of color developing degree of the quality control lines (points) significantly, deviation of the detection lines (points) can be corrected by the quality control lines (points), and thus, variation caused by deviation of raw materials (nitrocellulose membranes, water absorbent pads), sample viscosity, temperature and sample adding quantity and the like can be overcome effectively.

The invention discloses a treatment method for an analytical ferrograph ferrogram-making oil sample. The method comprises: firstly subjecting a collected oil sample to heating and oscillation to make abrasive particles suspend uniformly; detecting the content of iron in the oil sample, setting an oil sample abrasive particle concentration dilution ratio respectively according to the iron content, and adopting liquid paraffin as a concentration diluting solvent; employing a tetrachloroethylene organic solvent to dilute the oil sample viscosity, keeping the volume ratio at 3:1; subjecting the oil sample to ferrogram-making, and then subjecting the abrasive particles to monolayer deposition on a substrate, keeping the abrasive particle coverage within the range of 10%-30%, depositing ferromagnetic abrasive particles greater than 5 micrometers in the entrance region of a ferrogram, and arranging the abrasive particles in a chain along a magnetic line direction. The abrasive particles on the ferrogram are free of stacking phenomenon, and no residual oil trace is left on the ferrogram, thus facilitating clear observation of a ferroscope. The method provided by the invention determines and established an oil sample dilution ratio standard, and under the premise of ensuring the abrasive particle accuracy reflected by the ferrogram, enhances the ferrogram-making efficiency of an analytical ferrograph, and improves the accuracy of equipment diagnosis.

The invention discloses a method for detecting the stability and viscosity of battery slurry, which comprises the following steps: S1, respectively sampling from the upper layer and the lower layer ofthe battery slurry, and marking as an upper-layer sample and a lower-layer sample; S2, respectively carrying out twice test scanning on the upper-layer sample and the lower-layer sample by using a rheometer to obtain four rheological curves; S3, analyzing the coincidence of the four rheological curves, wherein when the coincidence of the four curves is poor, it is determined that the stability ofthe battery slurry is poor, and when the coincidence of the four curves is excellent, it is determined that the stability of the battery slurry is good, and calculating the average value of the viscosity of the sample detected for four times to obtain the viscosity of the battery slurry. The method is simple to operate, and the stability and viscosity value of the battery slurry can be accuratelyevaluated.

The invention discloses a polyacid-based electrolyte conductor material as well as a preparation method and application thereof, and particularly discloses two preparation methods, namely a solid-state melting method and a solvent method. According to the polyacid-based electrolyte conductor material prepared by the invention, polyacid and a polymer form a three-dimensional network through hydrogen bond interaction, so effective transfer of protons is realized. When the polyacid mass ratio is 70%, the conductivity of the conductor material can reach 1.01*10 <-2> Scm < 1 > (-80 DEG C). In the aspect of mechanical properties, viscosity of the sample is 273 Pa.s, and safety of the sample as an electrolyte is guaranteed. Due to the shearing thinning behavior, the polyacid-based electrolyte conductor material has good processability.

The invention discloses a method for measuring the liquid viscosity in a capillary tube based on micro volume sample measurement, comprising the following steps of: filling the flow path with the flowing medium and then introducing the sample fluid, which is pushed by the flowing medium through the capillary tube; setting the volume V of the injection liquid to be larger than the volume Vc of thecapillary tube when the viscosity of the sample fluid is small or the sample fluid is compressed under high pressure so that the reduced volume thereof is negligible; and performing multiple injections and ensuring that the volume V of each injection liquid is smaller than the volume Vc of the capillary tube when the viscosity of the sample fluid is large and the sample fluid is compressed under high pressure but the reduced volume is not negligible. According to the method for measuring the liquid viscosity in a capillary tube based on micro volume sample measurement, the consumption of the sample is reduced by the setting of the flowing medium; the viscosity of the sample can be calculated without standard sample calibration, which also contribute to the consumption reduction of the sample; the sample consumption of the invention is small, thereby facilitating the testing of the micro volume sample and broadening the test range of the sample; and the method is suitable for the viscosity determination of non-Newtonian fluids and is excellent in practicability.

The invention discloses a coal sample viscosity distinguishing method used for coal sample collection and preparation integration. The method comprises the following steps: S1. monitoring the coal sample viscosity in real time: during normal operation of collection and preparation integrated coal sample detection equipment, monitoring the current value of a driving motor in a rotary wiping device in the integrated coal sample detection equipment in real time when coal samples pass through a rotary wiping position; S2. in the continuous monitoring process in the step S1, taking the current value of the driving motor at a certain period of time or at a given time, comparing the current value with the current value of the driving motor at a later certain period of time or at a later given time along with the continuity of time, and analyzing the variation trend of alternating current according to the comparison value to judge the coal sample viscosity. The method has the advantages of simple principle, extreme simplicity and convenience in operation, high precision, and the like.

The invention relates to improvement of a liquid chromatogram pretreatment instrument, in particular to an immunoaffinity column operating device. A solution tray is located on the rear part of the top end of a case, and thus the space for storing a solution bottle is omitted; and a cleaning pool is located at the front end of the case, a part of the cleaning pool is used for storing sample bottles and recovery bottles, and the other part of the cleaning pool serve as a cleaning part used for an injection needle. The cleaning part is provided with a corresponding cylindrical hole according tothe position of the injection needle, the injection needle is directly put into the hole when cleaned, and the inner wall and the outer wall of the needle are cleaned simultaneously. The problems thatas for an existing immunoaffinity column, the operation mode is long in time, the flow rate of liquid is uncontrollable, and the influence of sample viscosity and cleanliness is large are solved; andaccording to the immunoaffinity column operating device, multiple channels are formed, the flow rate of the liquid can be controlled, positive-pressure sample feeding is achieved, the sample recoveryrate is high, stable and consistent, a pipeline can be cleaned, and the low-residual effect is achieved.

The invention discloses a low-precipitation polyester film which is prepared from the following raw materials in parts by mass: 95-100 parts of low-precipitation polyester chips and 0-5 parts of an anti-blocking agent, wherein the two surfaces of the low-precipitation polyester film are coated with the same or different coating liquids. The preparation method of the low-precipitation polyester chips comprises the following steps: mixing terephthalic acid and ethylene glycol according to a molar ratio of 1:(1.1-2.0), and adding an auxiliary agent for polymerization, wherein the esterification temperature is 220-260 DEG C and the polycondensation temperature is 260-290 DEG C; when the viscosity of the sample is between 0.40 dL/g and 0.55 dL/g, ending the reaction to obtain a copolyester melt; and conducting extruding to form strips by using nitrogen, condcuting granulating to obtain slices, carrying out solid-phase polycondensation on the slices, and ending the reaction when the viscosity of a sample is 0.60-0.80 dL/g to obtain the low-precipitation polyester chips. The invention also discloses a preparation method of the low-precipitation polyester film. The low-precipitation polyester film prepared by the invention has better thermal stability and low precipitation property, the haze is lower than 1%, and meanwhile, the haze rising value is less than 0.5% after the film is heated for 2 hours at 150 DEG C, so that the phenomenon of atomization is avoided when the film is heated.

The present application relates to a hot-melt adhesive sample viscosity measuring device, which includes a first frame, on which a horizontally placed placing plate is installed, and a material conveying frame is installed on the upper end of the placing plate. A plurality of test balls are placed in the material conveying frame, and the diameters of the plurality of test balls are the same, and the quality is different; one side of the first frame is provided with a sample conveying mechanism for conveying the sample body to the test ball. device, the first rack is equipped with a pressing component that presses the sample body toward the test ball side so that the sample body contacts the test ball, and the material delivery frame is formed with a discharge that runs through the placement plate. The discharge groove is located on the side of the pressing assembly away from the input direction of the test ball. The application has the effects of shorter hot melt adhesive detection time and higher hot melt adhesive detection efficiency.

The invention discloses a method for determining dynamic change of a pressure gradient to be started after heavy oil water drive is converted into hot water drive. The method comprises the following steps: 1, collecting geological reservoir static data of a target block; 2, determining a relational expression of oil sample viscosity and temperature of a target block; 3, testing the quasi-starting pressure gradients of the core and the oil sample of the target block under different temperature and permeability conditions; 4, obtaining a change relational expression of the starting pressure gradients at different temperatures along with the fluidity; 5, obtaining formation temperature field distribution of different stages of the hot water flooding process of the target block; 6, calculating a starting pressure gradient according to the geological reservoir parameters of each grid; and 7, drawing starting pressure gradient distribution diagrams of different stages of hot water drive of the target block. According to the method, the relational expressions of the quasi-starting pressure gradients, the permeability, the viscosity, the temperature and the like of the heavy oil reservoirs of different geological reservoir types are quantitatively represented; in addition, formation temperature field distribution of different stages of hot water injection flooding of the target block is obtained; and the production pressure difference and the limit well spacing of the target block are determined.

The invention provides a polyacrylamide aqueous solution mine-field sampling viscosity stabilizing agent. The polyacrylamide aqueous solution mine-field sampling viscosity stabilizing agent is prepared from a Fe2+ ion complexing agent, a radical scavenger, and a deoxidant at a molar ratio of 2:0.5-1.5:0.5-1.5. The Fe2+ ion complexing agent is dipyridyl; the radical scavenger is a phenol mixture, and the phenol mixture is composed of phenol and resorcinol at a molar ratio of 3:0.5-1.5; and the deoxidant is thiourea. The polyacrylamide aqueous solution mine-field sampling viscosity stabilizing agent is capable of avoiding viscosity reduction of polyacrylamide aqueous solution in sampling processes caused by degradation; it is shown by comparing mine-field sampled polyacrylamide aqueous solution with in-door simulated polyacrylamide aqueous solution that mine-field sampling is capable of ensuring authenticity of sampling viscosity, and excellent application effect of mine-field sampling is achieved.

The invention discloses a coal sample viscosity judgment method used for coal sample collection and preparation integration. The method comprises the following steps: S1: setting a distinguishing threshold value; putting coal samples with standard viscosity in collection and preparation integrated coal sample detection equipment, and detecting the real-time current value of a driving motor in a rotary wiping device as the distinguishing threshold value when wiping operation is carried out on the coal samples with standard viscosity in a rotary wiping position; S2: monitoring the coal sample viscosity in real time; during normal operation of the collection and preparation integrated coal sample detection equipment, monitoring the current value of the driving motor in the rotary wiping device in the integrated coal sample detection equipment in real time when the coal samples pass through the rotary wiping position; sending the coal samples to drying equipment to be processed when the current value is more than the distinguishing threshold value; sending the coal samples to a next position behind the rotary wiping device in the collection and preparation integrated coal sample detection equipment to be processed when the current value is less than or equal to the distinguishing threshold value. The method has the advantages of simple principle, extreme simplicity and convenience in operation, high precision, and the like.

The invention relates to a method for accurately quantifying a crystallization temperature upper limit through basalt melt viscosity mutation, which comprises the following steps of: preparing a sample, melting and homogenizing, testing the viscosity of the sample to obtain a viscosity-temperature curve, and fitting the viscosity and the temperature: selecting a high-temperature section with a certain length on the viscosity-temperature curve by taking the highest temperature as a starting point, an exponential function model: eta (T) = eta 0 + A * exp (R0 * T) is adopted for fitting the viscosity-temperature correlation, a viscosity-temperature fitting curve is prolonged, and the abscissa of an inflection point C where the viscosity-temperature curve and the fitting curve are separated is the crystallization temperature upper limit TC. According to the method, accurate determination of the upper limit of the crystallization temperature of the basalt melt through sudden change of the high-temperature viscosity of the basalt melt is proposed for the first time, the technical problem that accurate determination of the upper limit of the crystallization temperature of the melt is lacked in the field of continuous basalt fiber preparation is solved, and an important reference is provided for reasonable setting of the wire drawing temperature.