6results about How to "High detection precision" patented technology

The invention provides an analysis method for ultra-low acid-soluble aluminum in a cord steel ping-pong sample, and relates to the field of steel analysis. First, the cord steel ping-pong sample is annealed to refine the crystal structure and eliminate the structure heterogeneity. Secondly, a milling machine is used to remove the oxide layer on the surface of the sample. Then, carbides are refined by adding dilute nitric acid and dilute hydrochloric acid separately and adding deionized water intermittently during the sample dissolution process. A medium-speed quantitative filter paper and acid washing filtration method are used to reduce possible inclusions, thereby improving the stability and accuracy of the result. Finally, the best spectral line is selected on an inductively coupled plasma emission spectrometer to establish an analysis method for ultra-low acid-soluble aluminum in a cord steel ping-pong sample. The method can be used for detecting acid-soluble aluminum with a content of 0.0002% to 0.04% in cord steel, and solves the problem that there is no analysis method for ultra-low acid-soluble aluminum in steel in the prior art.

This utility model discloses a combined temperature, humidity, and pressure detection device, including a main unit, an outer bracket, and a detection component. The outer bracket is fixedly installed on top of the main unit, and the detection component is movably installed on the inner side of the outer bracket. The inner detection component is installed and used through the outer bracket, and then used for multi-functional detection. The detection component includes a mounting plate, a temperature sensor, a humidity sensor, an inner bracket, a telescopic cylinder, a pressure plate, and a pressure sensor. Multiple sets of mounting plates are movably installed on the inner side of the outer bracket. This utility model uses multiple sets of temperature and humidity detectors that can be evenly distributed on the sides of the server rack, thus achieving good detection results for temperature and humidity in different directions and positions of the internally placed equipment. The detection precision is high, and the receiver serves as a data receiver, which can be connected to a controller to control the telescopic cylinder to lower the pressure plate for pressure detection.

The utility model relates to the technical field of inspection equipment, in particular to a near-infrared fluorescence immunoassay quantitative analyzer which comprises a box body, an information display system fixed on the surface of the box body, and a control circuit system, a material conveying and fixing system and a near-infrared fluorescence detection system which are fixed in the box body, the near-infrared fluorescence detection system is used for exciting and collecting near-infrared fluorescence emission signals and comprises an infrared light source, a first lens, a spectroscope, a second lens, an optical filter and a near-infrared photoelectric converter; exciting light emitted by the infrared light source reaches the spectroscope through the first lens along the horizontal direction; the spectroscope irradiates exciting light to a window area of the reagent card to excite fluorescent substances in a T strip area and a C strip area on the reagent card, then near-infrared fluorescence in the vertical direction is generated respectively, the near-infrared fluorescence passes through the second lens and then passes through the optical filter to remove interference of the exciting light and background fluorescence, and finally the near-infrared fluorescence is captured by the near-infrared photoelectric converter, so that the operation effect is good, and the detection accuracy is high. The detection precision is high.

The present invention relates to the technical field of lumbrukinase titer determination, particularly to a lumbrukinase titer determination method, which comprises: (1) taking a lumbrukinase test sample and a lumbrukinase standard substance, and respectively dissolving with a sodium chloride solution to obtain a test sample solution and standard substance solutions with different concentrations; (2) taking a fibrinogen solution, adding an agarose solution and a thrombin solution, uniformly mixing, quickly pouring into an elisa plate, and determining the OD value of each hole by using a microplate reader after agar is solidified; respectively adding the test solution and the standard solution into different holes, enabling the lumbrukinase to react with the fibrin, and determining the OD value of each hole by using a microplate reader after the reaction is finished; and calculating the OD value change difference rate. And calculating a regression equation according to the titer of the lumbrukinase standard substance and the OD value change difference rate, substituting the OD measured value of the test sample into the regression equation, and calculating the titer of the test sample. The method has the advantages of short time consumption, high correlation, strong specificity, high detection precision and high accuracy.

This invention relates to a multivariate near-infrared quantitative model based on a one-measure-multiple-evaluation method, its construction method, and its application. The construction method includes the following steps: (1) preparing a representative sample set; (2) using chlorogenic acid as an internal reference, obtaining the content of target polyphenolic compounds in each sample in the representative sample set of step (1) using a one-measure-multiple-evaluation method based on liquid chromatography, and collecting near-infrared diffuse reflectance spectral data of each sample in the representative sample set of step (1); (3) correlating the content of target polyphenolic compounds in each sample in the representative sample set of step (2) with the near-infrared diffuse reflectance spectral data, establishing a regression model and solving it, determining the optimal number of principal components, completing the model construction, and performing model validation. The multivariate near-infrared quantitative model provided by this invention can realize the simultaneous and rapid detection of multiple target polyphenolic compounds in tobacco or its products, adapting to the needs of precise laboratory analysis and large-scale industrial screening.

The invention belongs to the technical field of skin detection, and discloses a positioning device of a handheld skin detection instrument. Comprising positioning pieces on the two sides of the head, a jaw fixing seat, a precision sensor structure, a head adjustable fixing device used for fixing the positioning pieces on the two sides of the head and the jaw fixing seat, and an adjustable universal connecting support used for connecting the head adjustable fixing device and the precision sensor structure. The head-adjustable fixing device for fixing the positioning pieces on the two sides of the head and the jaw fixing seat is arranged, and the two sides of the outer wall of the head fixing seat and the two sides of the outer wall of the threaded movable plate are each integrally connected with two sets of convex hole bodies, so that the head fixing seat can be fastened through fixing of a threaded shaft rod; the head of a detected person is placed between the positioning pieces on the two sides of the head, the jaw of the detected person is placed on the jaw fixing base, and therefore the effect of fixing the head of the detected person is achieved.