35 results about "Ion dissociation" patented technology

There is provided an ion-mobility spectrometer. This apparatus includes the following configuration components: An ion source for generating first ions, a first drift unit for separating the first ions by flight drift times, an ion dissociation unit for generating second ions by dissociating the first ions separated, and a second drift unit for separating the second ions by flight drift times. Moreover, the first drift unit, the ion dissociation unit, and the second drift unit are located inside a chamber whose pressure is set at 10 mTorr or higher. This apparatus allows execution of low-cost and high-resolving-power ion separation and detection.

When a high-speed analyzer such as a quadrupole mass filter is united with an analyzer which requires a reaction time of 10 msec, such as an ion dissociation chamber of the ion trap type, a problem arises that an ion loss occurs due to a difference in analysis speed between the analyzers. A high-throughput analysis is intended to be achieved by eliminating this loss. A pre ion trap (4) is provided between a quadrupole filter (3) and an ion dissociation chamber (5), and ions are accumulated in the pre ion trap (4) while operations such as dissociation, isolation and ejection are being performed in the ion dissociation chamber (5). This configuration solves a problem with the ion dissociation chamber (5), which is a decrease in transmittance of the dissociation chamber (5), i.e., a decrease in throughput, and accordingly enables a high-throughput structural analysis on a measurement sample.

A method of processing a workpiece in the chamber of a plasma reactor includes introducing a process gas into the chamber, simultaneously (a) capacitively coupling VHF plasma source power into a process region of the chamber that overlies the wafer, and (b) inductively coupling RF plasma source power into the process region, and adjusting the extent of dissociation of species in the plasma by adjusting the ratio between the amounts of the capacitively coupled VHF power and the inductively coupled power. The method may further include controlling plasma ion density in the chamber by controlling the total amount of plasma source power capacitively and inductively coupled into the process region.

Methods for applying an RF field in a two-dimensional electrode structure include applying RF voltages to main electrodes and to compensation electrodes. The voltages on the compensation electrodes may be adjusted to be proportional to the voltages on the main electrodes. The adjustment(s) may be done to optimize the RF field for different modes of operation such as ion ejection and ion dissociation. For dissociation, a supplemental RF dipole may be applied, or two mutually orthogonal dipoles may be applied in phase quadrature to form a circularly polarized field. Electrode structures may include main trapping electrodes, one or more compensation electrodes, one or more ion exit apertures, and means for applying the various desired voltages.

In a mass spectrometer in which a high ion dissociation efficiency is possible, inserted electrodes are arranged with a form divided into two or more in the axial direction of the ion trap, an electric static harmonic potential is formed from a DC voltage applied to the inserted electrodes, and with an Supplemental AC voltage applied, ions in the ion trap are oscillated between the divided inserted electrodes in the axial direction of the ion trap by resonance excitation, and the ion with a mass/charge ratio within a specific range is mass-selectively dissociated. Thus, a high ion dissociation efficiency is realized by the use of ion trap of the present invention.

The invention discloses nano titanium dioxide suspension. By optimization of selection and proportion of raw material components, a visible light absorption wavelength range is effectively expanded, efficient negative ion dissociation capability is achieved after surface coating formation, and accordingly better air purification and bactericidal efficacies can be achieved. By introduction of nano graphene oxide excellent in thermal conductivity and electricity conductivity into the raw material components, the suspension has excellent anti-adhesion and antistatic performances after solidification. The nano titanium dioxide suspension is high in stability, and a preparation method is simple, high in operability and beneficial to industrial large-scale production. The invention further discloses anti-adhesion self-cleaning artificial board decorative paper. The surface of the anti-adhesion self-cleaning artificial board decorative paper is coated with a nano titanium dioxide photocatalyst coating, an efficient negative ion release performance is achieved, and a preparation method of the decorative paper has advantages of simplicity, high efficiency, environmental friendliness and the like. Laminated artificial decorative boards meet requirements of JC/T2110-2012 Indoor Air Ion Concentration Test Method.

The invention discloses an electrochemical antiseptic device using a latticed titanium anode and a protection device. A protection cover is arranged on the upper surface of a reinforced concrete member; an electrolyte solution is placed in the protection cover; a metal net is arranged on the inner side of the protection cover; an anode of a direct-current power supply is connected with the metal net through a wire penetrating through a first open hole, and a cathode of the direct-current power supply is connected with a reinforcing steel bar through the wire penetrating through a second open hole, so that an electrical circuit is formed. The protection cover with adjustable area is adopted to place the electrolyte solution, and can be adjusted aiming at different conditions, so that the application range is wide, and meanwhile, the defects of small single working range and low efficiency in existing chloride ion dissociation are overcome; the lithium hydroxide electrolyte are adopted, so that the possibility of alkali-aggregate reaction is less than the possibility by adopting a calcium hydroxide solution; the metal net at the sacrificial anode part adopts the titanium metal net, which cannot be corroded, can also be recycled, and cannot produce pollution on the concrete surface.

The invention provides a pulse electroplating agent capable of plating high-aspect-ratio through holes and blind holes, and a preparation method thereof. The pulse electroplating agent comprises polyethylene glycol, sodium polydisulpropane sulfonate, formaldehyde, a fatty amine and ethylene oxide addition product, crosslinked polyamide, sulfuric acid, ethylene sulfur vein, sodium dodecyl sulfonate, bisbenzenesulfonic acid imide and the balance water. The blocking ability of the low-current zone agent is improved by adding PEG20000, specifically, the anode ion-dissociation efficiency is improved by applying PEG20000, and the anode migration efficiency is improved. Plating layer crystals are refined by adding the bisbenzenesulfonic acid imide, the blind hole filling effect is improved, and the quality of a blind hole plating layer is improved.

The invention provides a polymer single ion conductor which is formed by reacting lithium hydroxide with a carboxyl-containing polymer with a structure shown in a formula (I). The polymer has a main chain structure of -CH2-CH-, the main chain is carried with carboxyl lithium side groups, under the action of a polymer chain segment motion, the carboxyl lithium moves with the main chain, and dissociation and combination of lithium ions between the two carboxyl lithium side groups so as to conduct the lithium ions. After a lithium ion dissociation agent containing BF3 is added, -COO<-<Li<+> forms-COOF3B<->Li<+>, and the dissociation degree of the lithium ions is further improved to improve the dissociation and combination rate of the lithium ions and further improve the lithium ion conductivity.

The invention relates to the technical field of mass spectrometry and provides an ion dissociation method based on a quadrupole rod-ion trap tandem mass spectrometer. A sample is ionized by an electrospray ion source, ions with a set mass-to-charge ratio are screened out from ionized ions by utilizing a quadrupole rod to enter an ion trap, the ions are dissociated by the ion trap, and dissociatedfragment ions are stored in the ion trap, wherein two processes of screening the target ions by the quadrupole rod and dissociating the ions by the ion trap are carried out at the same time. Differentfrom a traditional dissociation operation which occurs after an ion gate is closed, according to the method, a dissociation operation is applied to the ion trap while the target ions are screened bythe quadrupole rod, so that the target ions and impurity ions with similar mass-to-charge ratios are dissociated immediately when entering the ion trap, the dissociation of the target ions and the capture of the fragment ions are not interfered by the impurity ions, and the analysis accuracy is remarkably improved; meanwhile, the dissociation operation does not need to be carried out in an additional time sequence, so that the operation time is saved.

The degree of ion dissociation which occurs within a first intermediate vacuum chamber (212) maintained at a comparatively low degree of vacuum depends not only on the amount of energy of the ion but also on the size and other properties of the ion. Accordingly, a predetermined optimum level of DC bias voltage is applied to an ion guide (24) so as to create, within the first intermediate vacuum chamber (212), a DC electric field which barely induces the dissociation of an ion originating from a target compound in a sample while promoting the dissociation of an ion originating from a foreign substance which will form a noise signal in the observation of the target compound. The optimum DC bias voltage is previously determined by creating extracted ion chromatograms based on data collected under various DC bias voltages and evaluating the SN ratio using the chromatograms. Consequently, the accuracy and sensitivity of the quantitative determination is improved as compared to a conventional system in which only the signal strength of the target compound is considered.

Provided is a mass spectroscope employing electron capture dissociation wherein the peak number of detectable fragment ions is increased. The mass spectroscope comprises an ion source (2) for generating ions from a sample, an ion trap (3) for storing and selecting ions, an ion dissociation section (4) performing electron capture dissociation on ions, and a time-of-flight mass spectrometry section (7) performing mass spectrometry on ions, wherein the reaction time of electron capture dissociation is variable depending on the valence of ions subjected to mass spectrometry.

After a precursor ion has been captured within an ion trap (2), electrons having a high energy equal to or higher than 30 eV are introduced from an electron irradiator (7) into the ion trap (2) to increase the number of charges of the ion through an interaction between the electrons and the ion. Hydrogen radicals are subsequently introduced from a hydrogen radical irradiator (5) into the ion trap (2) to dissociate the ion by a hydrogen-attachment dissociation (HAD) method. The larger the number of charges of the ion is, the higher the dissociation efficiency by the HAD method becomes. Therefore, for example, even in the case of using an ion source in which most of the generated ions are singly charged ions as in a MALDI ion source, the dissociation efficiency can be improved by increasing the number of charges of the precursor ion within the ion trap (2).

The invention provides a high-collision-energy alternating voltage ion dissociation device and a mass spectrometry method. The device is characterized in that the device comprises a pair of X electrodes which are parallel to each other, a pair of Y electrodes which are parallel to each other and a pair of end cover electrodes; and the X electrode pair and the Y electrode pair are parallel to eachother and have equal distances to the geometric center of the device. The at least one pair of electrodes is divided into two electrodes in the axial direction (the z direction is perpendicular to thexy plane). The phases of alternating voltages applied to the two electrodes on one side by a first alternating voltage power supply are opposite; and a second alternating voltage power supply appliesalternating voltage with the same or opposite phase as the output signal of the first alternating voltage power supply to the two electrodes on the other side. According to the high-collision-energyalternating ion dissociation device and method, the structure is simple, the machining and manufacturing cost is low, and the voltage applying mode is easy to achieve.

The invention provides a modified diatomite additive for an electrolyte for a lithium battery and a preparation method. The method comprises the steps of firstly preparing a starch ether solution andadjusting the starch ether solution to strong alkalinity by using sodium hydroxide; adding fatty acid and diatomite powder to the starch ether solution, carrying out heating and stewing and adjustinga system to strong acidity by using diluted hydrochloric acid; and filtering, washing a product to neutrality by using deionized water and carrying out vacuum drying dehydration to obtain the modifieddiatomite additive for the electrolyte for the lithium battery. According to the method, decomposition of hexafluorophosphate is inhibited in a lithium ion dissociation process through filling diatomite with starch ether and absorbing the hydrogen fluoride and trace water by the diatomite, gas expansion of the lithium battery is effectively reduced and the viscosity stability of the electrolyte for the lithium battery at low temperature can be improved, thereby improving the low temperature performance of the lithium battery.