163 results about "Ion formation" patented technology

The invention claims a simultaneous colorimetric determination method for joint determination of hexavalent chromium and lead in water, which is characterized in that it uses mixed reagents to form different colored complexes with hexavalent chromium and lead ions in water samples, and compares Colorimetric measurement of the output of two colored complexes to achieve simultaneous determination of hexavalent chromium and lead. The invention can solve the problems that the existing detection methods for hexavalent chromium and lead ions are cumbersome to operate and cannot realize rapid and on-site determination of two indexes at the same time.

The invention discloses a method for recycling valuable components from a waste lithium cobalt oxide battery positive electrode sheet, and belongs to the field of waste lithium battery recycling. According to the method, residual electrolyte and an organic binding agent in the positive electrode sheet are removed by using a pyrolysis method, and the thermal reduction of the positive electrode sheet lithium cobalt oxide is synchronously realized; efficient dissociation of the positive electrode sheet material particles and the aluminum foil is realized through hydraulic stirring and water bathheating, and the purposes of ion formation of the water-soluble lithium-containing compound and separation of the lithium element and the cobalt element are achieved synchronously; separating and purifying of the electrode material and the aluminum foil are achieved by adopting a screening method; and purifying of the cobalt element is achieved through an acid leaching method by means of an acid without a reducing agent. According to the technical scheme of the method, the purposes of removing organic matters in the electrode sheet and performing metal ion thermal reduction are achieved synchronously.

The invention relates to a dasatinib liposome preparation, and a preparation method thereof. The dasatinib liposome preparation is high in biocompatibility; target modification can be carried out; sustained and controlled release of dasatinib can be realized; and it is beneficial for maintenance of relatively high plasma drug concentration in a long term, improvement of drug distribution, and increasing of drug bioavailability. The dasatinib liposome preparation possesses excellent lipophilic performance, is capable of passing through phospholipid bilayer in a molecular form and entering into inner water phase; pH value of liposome inner water phase is relatively low, the dasatinib moleculars are capable of bonding with hydrogen ions so as to form dasatinib ions, and combination with anions in an ammonium salt solution and forming of insoluble salts are realized, diffusion of dasatinib in the inner water phase into an outer water phase is inhibited, dasatinib is coated by the liposome inner water phase steadily, encapsulation efficiency and storage stability are improved, and excellent in-vitro slow release effect is achieved.

The invention discloses a method for preparing nitrate intercalation cobalt and aluminum type hydrotalcite in one step through coprecipitation. An acetic acid-sodium acetate buffer solution is used; the pH value of a preparation system is stably controlled at 4.00 to 5.00; cobalt-nitrate hexahydrate and aluminum nitrate nonahydrate are used as raw materials; sodium hydroxide is used as a precipitator; deionized water is used as a solvent and a washing agent; the nitrate intercalation cobalt and aluminum type hydrotalcite is prepared through the steps of solution preparation, titration co-precipitation, hydro-thermal treatment, washing, suction filtration and drying. The preparation method has the advantages that the influence of CO3<2-> ion formation due to dissolution of CO2 in the environment can be effectively avoided; the method belongs to a fast preparation method of the pure phase nitrate intercalation cobalt and aluminum type hydrotalcite.

Systems and methods for delivering a sample to a mass spectrometer are provided. In one aspect, the systems and methods can provide efficient cooling of an ion source probe to prevent overheating and the resulting degradation in ion sampling. In some aspects, such cooling can result in improved consistency and/or efficiency of ion formation. Moreover, ion source cooling in accordance with various aspects of the present teachings can allow for the use of higher temperatures in the ionization chamber (thereby improving desolvation) and/or can enable the use of lower flow rate sample sources than with conventional techniques.

The invention discloses a lead ion visual detection method and detection kit. The detection kit comprises a test strip detection platform, a buffer system and nucleotide sequences A, B C and D. By means of the characteristics that the A, B, C and D are partially complementary in sequence and the A has a lead ion specific recognition element, A-B heteroduplex and lead ion recognition are utilized, the A and lead ions form a G-tetramer structure, and the A is dissociated out; then the B-chain obtained through replacement is dripped onto a sample pad of the test strip for detection, and the B forms a macroscopic strip in the detection area by continuing to be combined with the C. Neither traditional 8-17DNAzyme nor RNA synthesis nor antibodies are needed, the detection result is directly macroscopic, operation is easy, cost is low, and the lead ion visual detection method and detection kit are suitable for being used and popularized in units. The lead detection limit of the method is 1 nM which is lower than 72 nM, the maximum allowable limit, ruled by the USEPA, of lead ions in drinking water.

The invention relates to the production of water cluster ions (“hydronium clusters”) at atmospheric pressure for the chemical ionization of analyte molecules. It is proposed that a corona discharge at the Taylor cone of an aqueous liquid, preferably pure or slightly acidified pure water, is used instead of corona discharges on metal tips, which have been the usual method up to now. The hydronium clusters of the form [H(H₂O)_n]⁺ can be produced in a discharge chamber, which is separate from the ionization chamber, and introduced into the ionization chamber through a capillary. In the ionization chamber, the hydronium clusters can be heated and reduced in size by means of electrical acceleration and gas collisions, and thus made more reactive in order that analyte molecules of low proton affinity can also be ionized.

The invention generally relates to methods and devices for synchronization of ion generation with cycling of a discontinuous atmospheric interface. In certain embodiments, the invention provides a system for analyzing a sample that includes a mass spectrometry probe that generates sample ions, a discontinuous atmospheric interface, and a mass analyzer, in which the system is configured such that ion formation is synchronized with cycling of the discontinuous atmospheric interface.

The invention provides a grosvenorine-zinc complex and a preparation method thereof. The grosvenorine-zinc complex is a complex of grosvenorine and Zn(II) ions and has a structure represented by a formula (I). The preparation method comprises the following steps: dissolving grosvenorine and salt of metal zinc into water, regulating a pH value by virtue of alkali, carrying out constant-temperaturestirring, and respectively carrying out nanofiltration, desalination, membrane concentration, crystallization, washing and drying, so as to obtain the grosvenorine-zinc complex. The metal complex is formed by the grosvenorine and metal microelement zinc beneficial to a human body, so that the modification range and application range of the grosvenorine are expanded. The complexing rate of the obtained metal zinc complex is over 84%, the biological utilization rate is high, and the metal zinc complex has excellent anti-tumor biological activity and particularly has selective inhibitory activities to melanoma cells and hepatoma cells.

The invention provides a manufacturing method of a SiC MOSFET device and a SiC MOSFET device. The method comprises the following steps of: providing a SiC epitaxial wafer, and depositing and growing a mask layer on the surface of the SiC epitaxial wafer; etching the mask layer, forming a first etching groove in the mask layer; etching the mask layer again, and forming a second etching groove in the first etching groove; injecting first high-energy ions through an ion injection window formed by the first etching groove and the second etching groove to form a stepped well region; and injecting second high-energy ions to form a source region. According to the manufacturing method for the SiC MOSFET device of the invention, the self-alignment process is realized through the ion implantation window with the stepped morphology, the length and position of a channel can be accurately controlled, and the process is simple and stable. Meanwhile, P well regions with the step-shaped morphology are formed, a JFET region between the two P well regions is expanded, so that the current transverse output path of the JFET region is increased, and the large current density output capability of the device is improved.

The invention provides a rapid sedimentation defluorination agent for treating steel-making fluorine-containing turbid circulating water and a preparation and use method. The rapid sedimentation defluorination agent for treating steel-making fluorine-containing turbid circulating water uses reverse osmosis concentrated water as a trapping agent to trap fluoride ions in water to form calcium fluoride precipitate, and then calcium fluoride in the water is removed by adsorption of a rapid adsorption sedimentation agent, and finally the defluorination work is completed. By means of characteristicsof high salt, high calcium and high magnesium of the reverse osmosis concentrated water, waste is turned into treasure. The reverse osmosis concentrated water is used as the trapping agent, and the problem of high fluoride ion content in the steel-making turbid circulating water is solved by combining with the rapid adsorption sedimentation agent. On the one hand, the problem of excessive fluorine content in steel-making wastewater is solved, and the purpose of reducing hardness of reverse osmosis concentrated water is achieved.

A mass analyser in which ions form packets that oscillate with a period has an ion detector comprising: a detection arrangement; and compensation circuitry. The detection arrangement may comprise: a plurality of detection electrodes detecting image current signals from ions in the mass analyser; and a preamplifier, providing an output based on the image current signals. The compensation circuitry provides a compensation signal to a respective compensatory part of the detection arrangement, based on one or more of the image current signals. A capacitance between each of the compensatory parts of the detection arrangement and a signal-carrying part of the detection arrangement affects the signal-to-noise ratio of the preamplifier output. A generator may provide a trapping field defining an ion trapping volume and a shielding conductor may be positioned between two detection electrodes, with a controller applying a voltage to the shielding conductor based on a detected image current.