4results about How to "Fast elution" patented technology

The utility model provides a magnetic bead sorting NK immune cell preparation and extraction device which comprises a base, a control shell is upwards arranged on the base, a magnetic field shell is arranged in the middle of the front side of the control shell, and a plurality of magnetic field grooves are inwards formed in the front side of the magnetic field shell. Each magnetic field groove comprises a first-level magnetic field groove located on the upper portion and a second-level magnetic field groove located on the lower portion, the section of each first-level magnetic field groove is larger than that of the corresponding second-level magnetic field groove, and a first-level magnetic field electromagnet is arranged on the periphery of each first-level magnetic field groove in the magnetic field shell. A secondary magnetic field electromagnet is arranged on the periphery of each secondary magnetic field groove in the magnetic field shell; the chromatographic column is divided into a sample section, a first-stage chromatographic section matched with the first-stage magnetic field groove and a second-stage chromatographic section matched with the second-stage magnetic field groove from top to bottom. The utility model provides a grading magnetic bead sorting structure, which can effectively avoid the blocking phenomenon, effectively improve the sorting efficiency of cells and improve the final yield.

This invention discloses a bismuth-containing composite, its preparation method, and its application in chloride ion elution. The bismuth-containing composite comprises bismuth oxide and a dopant element, which is one or more of titanium, nickel, copper, iron, cobalt, carbon, and nitrogen. As a dechlorination agent, this bismuth-containing composite, by selecting a semiconductor element as the dopant, can reduce the stability of the Bi-O covalent bonds in the sample, making them more susceptible to breakage under hydrogen ion attack, leading to structural collapse and the release of more bismuth ions, thus promoting the dechlorination reaction. Furthermore, after the bismuth-containing composite participates in the dechlorination reaction, the dechlorination product easily forms a heterojunction under light excitation during elution, allowing electrons to transfer to the introduced semiconductor, forming electron-hole pairs. The remaining holes on the bismuth oxychloride undergo photocorrosion, promoting the conversion of bismuth oxychloride to bismuth oxide, facilitating recycling, and improving subsequent dechlorination efficiency.

The utility model discloses a kind of low pressure preparation chromatogram sample purification and automatic feeding device, it is related to the field of pharmaceutical synthesis experiment, and it includes: the upper end of extraction column pipe is set open, lower end is connected and is provided with lower interface, and extraction column pipe is filled with adsorption extraction filler layer above lower interface in;Adsorption extraction filler layer is flexible mechanical compressible material with communicating type porous;Vacuum evaporation heater is sleeved in the outside of extraction column pipe, for the target reaction mixture is removed by vacuum heating evaporation;Liquid channel is connected and is provided with in sample rod along the axial direction, and the outer periphery of one end of sample rod is circumferentially sleeved with sealing assembly;The one end of sample rod setting sealing assembly is pushed into extraction column pipe from upper end opening, for compressing adsorption extraction filler layer;The inner wall of extraction column pipe is tightly attached to the outer wall of sealing assembly, for sealing extraction column pipe. The scheme not only does not need to operate the silica gel micro powder of health threat, also greatly speeds up the purification speed of chemical reaction mixture.

This invention relates to the field of sample pretreatment technology, and in particular to a rapid extraction method for pesticides in water based on a confined liquid membrane. The method includes the following steps: preparing a composite substrate membrane comprising carbon nanofibers / carbon fibers and carbon nanofibers / carbon spheres; injecting ethanol as a confining solvent through the composite substrate membrane until droplets form beneath the membrane, thus completing the construction of the confined liquid membrane; passing a water sample containing the target pesticide through the confined liquid membrane at a set flow rate; using a desorption solvent at a set flow rate through the confined liquid membrane to elute the extracted target pesticide; collecting the eluent and performing quantitative analysis. This invention, through its ingenious confined liquid membrane design, successfully achieves rapid simultaneous extraction of pesticides with a wide polarity range and multiple categories from water while ensuring high extraction efficiency and good reproducibility.