4results about How to "Realize determination" patented technology

The application discloses a kind of polybrominated diphenyl ether class substance determination methods, utilize DGT device determination environmental medium (water body, soil and sediment) polybrominated diphenyl ether class substance, with the modified multi-walled carbon nanotube of 0.5-2 microns length of particle size, about 50nm diameter modified carbon nanotube adsorption film is prepared to agarose membrane, the adsorption film is applied to gradient diffusion film (DGT) technology based on, and suitable shell device, diffusion membrane, filter membrane are selected;After adsorption is completed, suitable eluent is selected, and the determination error of polybrominated diphenyl ether class substance is maximized to eliminate;The application preparation process is simple, time is short, determination and subsequent processing procedure is simple and convenient, suitable for in-situ detection of polybrominated diphenyl ether class substance in water body.

This invention provides a method for detecting and calculating the austenite content in steel based on a permeability meter, relating to the fields of steel and electromagnetics. Based on the theoretical differences in saturation magnetization of different phases in ferromagnetic materials, this invention establishes a theoretical calculation model and detection method for measuring austenite content using a permeability meter. A standard-prepared sample is placed in a magnetic pole shoe, and the magnetic field strength H corresponding to the maximum permeability of the ferromagnetic material is first measured. μ Then at ≥1.5H μ Under a magnetic field strength of J, the polarization intensity of the magnetic field strength at multiple points was measured at continuous intervals. m Then, based on the saturation magnetization approximation law and derivation law, the saturation magnetization Js is fitted and solved. Finally, the austenite content is determined according to the theoretical calculation model of austenite content. The method described in this invention solves the influence of the constantly changing effective magnetic path length of traditional magnetometers on the measurement results. The method for determining austenite content is simple, has a solid theoretical basis, high measurement accuracy, and strong data repeatability.

The present disclosure relates to a coal quality analysis system and method, wherein the coal quality analysis system comprises: a first heating furnace configured to heat a coal sample to volatilize moisture in the coal sample; a second heating furnace configured to heat the coal sample after dehydration by the first heating furnace to volatilize volatile matter in the coal sample and cause reactions of sulfur components, carbon components and hydrogen components; a gas supply assembly comprising: a nitrogen gas source configured to supply nitrogen gas to the first heating furnace, and an oxygen gas source configured to supply oxygen gas to the second heating furnace; and a gas analysis assembly comprising a first branch and an analysis component, a first end of the first branch being connected to an exhaust port of the second heating furnace, a second end of the first branch being connected to the analysis component, the analysis component being configured to measure a content of the volatile matter and determine contents of the corresponding components according to reaction products of the sulfur components, the carbon components and the hydrogen components.

The present application discloses a method for detecting free protein content in polysaccharide protein conjugate, and the method is operated as follows: after pretreatment, the polysaccharide protein conjugate is labeled with protein labeling liquid and Chromeo P503 fluorescent reagent, after labeling, deionized water is added to terminate the reaction, and then sample detection is carried out; the present application adopts the method of fluorescent labeling to label the protein component in the detection product first, then separates through micellar electrokinetic capillary electrophoresis, and finally detects the free carrier protein tetanus toxoid and diphtheria toxin non-toxic mutant through a laser-induced fluorescence detector (LIF). The present method replaces the Lowry method with CE-LIF to improve the detection sensitivity of the protein; it is easy to realize automation, reduces the operation error, improves the repeatability and quantitative accuracy; the sample usage is small, only a few microliters of solution sample is needed for one-time analysis, so that the detection and analysis of trace samples can be realized; the analysis speed is fast, and the analysis of one sample can be completed within several tens of minutes.