Agilent Technologies, Inc.

Other

Motorola Corporation

Denso Corporation

Hewlett-packard Company

Furukawa-sky Aluminum Corporation

Furukawa-sky Alumnum Corp.

Noriyuki Yamada

Kenichi Sakata

Erina Shimizu

Sunao Fukuda

Masaki Shimizu

Kenji Negura

Yoshiaki Ogiwara

Yoshihiko Kamiya

Satoshi Tanaka

Akio Niikura

Takeyoshi Doko

Kazumitsu Sugano

Jun Kitamoto

Takeo Kuwabara

Takeshi Nishijima

Yu Okamoto

Ryotaro Midorikawa

Donald Lee Potter

James Charles Wirfel

Abelardo Gabriel Gutierre Martinez

Shigeru Nawa

In an inductively coupled plasma-mass spectrometry (ICP-MS) system, ions are transmitted into a collision/reaction cell. A DC potential is applied at an exit of the cell at a first magnitude to generate a DC potential barrier effective to prevent the ions from exiting the cell. The DC potential barrier is maintained during a confinement period to perform an interaction. After the confinement period, analyte ions or product ions are transmitted to a mass spectrometer by switching the exit DC potential to a second magnitude effective to allow the analyte ions or product ions to pass through the cell exit as a pulse. The analyte ions or product ions are then counted during a measurement period. The interaction may be ion-molecule reactions or ion-molecule collisions.

Inductively coupled plasma mass spectrometry (ICP-MS) with improved signal-to-noise and signal-to-background ratios

An inductively coupled plasma-mass spectrometry (ICP-MS) system includes an ion trap, in which ions are trapped and subsequent ejected by mass-selective ejection (MSE). The system may have a linear quadrupole configuration, in which the ion trap is a linear ion trap (LIT) that is preceded by a pre-LIT linear quadrupole device and/or a post-LIT quadrupole device. The pre-LIT and/or post-LIT quadrupole device may be configured or operated as an RF-only ion guide or as a mass filter or mass analyzer, with or without mass scanning. The system may be utilized in particular for multi-element analysis of fast transient signals produced from ion pulses, where the sample under analysis is a single particle, single biological cell, or a cloud or aerosol produced for example by single-shot laser ablation.

Inductively coupled plasma mass spectrometry (ICP-MS) with ion trapping

A tandem collision/reaction cell for an inductively coupled plasma-mass spectrometry (ICP-MS) system includes a first ion guide, a second ion guide, and an intermediate electrode in the vicinity of an exit end of the first ion guide. A DC potential barrier is applied to the intermediate electrode. The cell may provide two or more stages of an ion-molecule collision process.

Tandem collision/reaction cell for inductively coupled plasma-mass spectrometry (ICP-MS)

An inductively coupled plasma MS/MS mass analyzer (ICP-MS/MS) may include a first vacuum chamber which draws plasma containing an ionized sample into vacuum, a second vacuum chamber which includes a device or means which extracts and guides ions as an ion beam from the ions output from the first vacuum chamber, a third vacuum chamber which has a first ion optical separation device or means, a fourth vacuum chamber which has a cell into which reaction gas is introduced, and a fifth vacuum chamber which has a second optical separation device or means and a detector, wherein the second vacuum chamber and third vacuum chamber are individually evacuated.

Inductively coupled plasma MS/MS mass analyzer

A method of brazing an aluminum alloy material, which is a Nocolok brazing method of the aluminum alloy material, in which the method satisfies the condition:&#xb0; C.in which Tf represents an incipient fluidization temperature of a filler material, and Ts represents an incipient fluidization temperature of flux.

Method of brazing an aluminum alloy material and method of producing an aluminum alloy heat exchanger

A side wallthat extends in the axial direction enclosing the plasma in such a way that expansion of plasma to the sides is prevented at the back surface of a skimmer coneand a small collision chamber, which is positioned at the back side of this side walland is defined by a flat partof a first electrodehaving an openingthrough which the ion beam can pass. By means of this small collision chamber, the pressure inside the chamber rises without introducing additional gas; therefore, argon ions are neutralized by collision and recombination between the ions and electrons and the ion density of the plasma is reduced. Thus, the beam diameter during ion extraction and transport is maintained relatively small.

Mass spectrometer

An inductively coupled plasma mass spectrometer comprises a control devicefor collectively controlling each of the following factors: the amount of liquid drops in the aerosol that is to be supplied to a plasma torch, the flow rate of carrier gasesA andB in this aerosol, the RF output of a high-frequency power source, and the distance Z between plasma torchand sampling interfaceand

Inductively coupled plasma mass spectrometer

An aluminum alloy heat exchanger having a tube composed of a thin aluminum alloy clad material, wherein, in the clad material, one face of an aluminum alloy core material containing Si 0.05&#x2013;1.0 mass % is clad with an Al&#x2014;Si-series filler material containing Si 5&#x2013;20 mass %, and the other face is clad with a sacrificial material containing Zn 2&#x2013;10 mass % and/or Mg 1&#x2013;5 mass %, and wherein an element diffusion profile of the clad material by EPMA satisfies (1) and/or (2):L-L-L&#x2267;40(&#x3bc;m) &#x2003;&#x2003;(1)L-L-L&#x2267;5(&#x3bc;m) &#x2003;&#x2003;(2)wherein L is a tube wall thickness (&#x3bc;m); Lis a position (&#x3bc;m) indicating an amount of Si diffused from the filler material; and Land Leach represent a region (&#x3bc;m) indicating an amount of Zn or Mg diffused from the sacrificial material, respectively; and a method of producing the heat exchanger.

Aluminum alloy heat exchanger and method of producing the same

An aluminum alloy brazing sheet having a four-layered structure, of sheet thickness 0.2 mm or less, and having a core alloy, a filler alloy of an Al&mdash;Si alloy on one surface of the core alloy, a sacrificial anode material of an Al&mdash;Zn alloy on the other surface of the core alloy, and an intermediate layer between the core alloy and sacrificial anode material, wherein the core alloy is composed of an Al alloy containing given amounts of Si, Fe, Mn, and Cu, with the balance being made of Al and unavoidable impurities, and wherein the intermediate layer is composed of an Al alloy containing given amounts of Si, Fe, Mn, and Cu, with the balance being made of Al and unavoidable impurities.

Aluminum alloy brazing sheet for a heat exchanger

Inductively coupled plasma mass spectrometer and method

An inductively coupled plasma mass spectroscopic includes a sample introduction section for nebulizing a sample solution; an ionization section, including a torch, for ionizing a nebula of a sample solution that is carried with a carrier gas; an interface section for sampling the ionized elements in the nebula at an atmospheric pressure and directing ions of the ionized elements into an ion lens section under a vacuum; the ion lens portion, containing an ion beam guide, for converging the ions which have passed through the interface section wherein at least one part of the ion lens portion is a multipole ion beam guide with at least four electrode rods; a mass selection portion, having a mass filter, for filtering the ions based on the measured mass number; and a detection section for counting filtered ions.

Inductively coupled plasma mass spectroscopic apparatus

A protective power foldback circuit which protects a power semiconductor device from damage resulting from variations in load, supply voltage, and input drive power is disclosed. When the supply voltage exceeds a certain value, the drive power to the power device is reduced in an amount greater than that produced by the excess supply voltage thereby protecting the power device from the combined effects of load, supply voltage, and drive power.

Growing community of inventors

Tokyo, Japan

Noriyuki Yamada