Horiba, Ltd.

Horiba Stec, Co., Ltd.

Hiroshi Uchihara

Takahito Inoue

Kohei Sasai

Toshihiro Ikeyama

Masahiko Ikeda

Ichiro Asano

Masayuki Adachi

Kyoji Shibuya

Takeshi Yamada

Yasushi Nakata

Katsuya Tsuji

Atsushi Bando

Junji Okayama

Kazushi Sasakura

Hirokazu Fukushima

An element analysis method is capable of maintaining accuracy of zero-point correction equivalent to that in the related art while shortening the time required for element analysis. The method includes heating a sample placed in a crucible in a heating furnace, and measuring an amount of an element contained in a gas discharged from the heating furnace by an analysis mechanism to analyze the element contained in the sample. The method includes: a blank measurement step of measuring the amount of the element contained in the gas discharged from the heating furnace when only the crucible is heated; and a step of setting an amount of zero-point correction based on a measurement value in a transient state region where the measurement value rises in blank data obtained in the blank measurement step.

Element analysis method, element analysis device, and non-transitory computer readable medium storing program for element analysis device

An elemental analysis device includes a heating furnace in which a test sample that is placed in a crucible is heated so that a sample gas is generated from the test sample, an inflow path through which a carrier gas is introduced into the heating furnace, an outflow path through which a mixture gas made up of the carrier gas and the sample gas is led out from the heating furnace, a dust filter that is provided on the outflow path, an analysis mechanism that is provided on the outflow path on a downstream side from the dust filter, and that detects one or a plurality of predetermined components contained in the mixture gas, and a cleaning gas supply mechanism that supplies cleaning gas to the dust filter in an opposite direction from a direction in which the mixture gas is flowing.

Elemental analysis device for analyzing test sample having cleaning gas supply mechanism

An elemental analysis device includes a first electrode and a second electrode between which a crucible MP containing a sample is nipped, and that heats the sample. The second electrode includes a second electrode main body that has a tip end having a substantially cylindrical shape, a second electrode tip, a cap that nips the second electrode tip between the cap and the second electrode main body such that a part of the second electrode tip is exposed to an outside, and a second screwing structure that includes a male thread and a female thread provided between the second electrode main body and the cap, and the second screwing structure further includes a purge groove that extends in a pitch direction and that is provided as a cutout provided to a part of crests of a thread of at least one of the male thread and the female thread.

Elemental analysis device

A sample analyzing apparatus analyzes a component to be measured securely while reducing a frequency of maintenance of the sample analyzing apparatus. The sample analyzing apparatus includes a heating furnace that heats a sample held by a sample holding body and a gas analysis section that analyzes a component to be measured contained in a gas generated by heating the sample, and the gas analysis section includes a laser light source that irradiates the gas with a laser light, and a photodetector that detects an intensity of a sample light as being the laser light that has transmitted through the gas.

Sample analyzing apparatus

A quadrupole mass spectrometer includes an ion source that ionizes a sample, a filter unit that includes a quadrupole and separates ions generated from the ion source according to mass, a detector that detects ions passing through the filter unit, a filter voltage controller that controls a filter voltage applied to the quadrupole to switch between a blocking mode in which ions entering the filter unit are not allowed to impinge on the detector and a passing mode in which ions entering the filter unit are allowed to impinge on the detector, the filter voltage including a radio-frequency voltage and a direct-current voltage, a baseline computing unit that computes a baseline based on outputs of the detector in the blocking mode, and an analyzing unit that outputs an analysis result of the sample based on outputs of the detector in the passing mode and the computed baseline.

Quadrupole mass spectrometer, quadrupole mass spectrometry method, and program storage medium storing program for quadrupole mass spectrometer

An objective of this invention is to conduct an accurate quantitative analysis on the Ar element contained in a sample gas by an element analysis device comprising a heating furnace and a mass spectrometer for conducting a quantitative analysis on an element in a vacuum atmosphere. The element analysis device comprises: a heating furnace that heats a graphite crucible containing a sample while introducing a carrier gas into the heating furnace, thereby vaporizing the sample to generate a sample gas; a quadrupole mass spectrometer that conducts the quantitative analysis on the Ar element contained in the sample gas in a mixed gas comprising the carrier gas and the sample gas discharged from the heating furnace, a first pressure regulator that controls the pressure of the carrier gas to be introduced into the heating furnace, and a second pressure regulator that controls the pressure of the mixed gas discharged from the heating furnace.

Element analysis device and element analysis method

Laser light having an energy of 1.9&#xb1;0.1 eV is projected onto a carbon nanotube-containing substance so that a Raman spectrum is acquired. On the basis of the intensity of a peak at Raman shift 221&#xb1;5 cmcaused by aggregates of single-walled carbon nanotubes, the degree of dispersion of single-walled carbon nanotubes in the carbon nanotube-containing substance is determined. A lower intensity of the peak indicates a higher degree of dispersion in the carbon nanotube-containing substance. As such, when the intensity of a particular peak contained in a Raman spectrum is measured, the degree of dispersion of single-walled carbon nanotubes in a carbon nanotube-containing substance can be evaluated easily and clearly.

Degree-of-dispersion determination method for single-walled carbon nanotubes and degree-of-dispersion determination apparatus for single-walled carbon nanotubes

An apparatus for analyzing the amount of gas in a solid sample such as a contained oxygen analyzing apparatus and method utilizing a preliminary reducing furnace which can be connected to an analyzing furnace by a transfer unit. A sample such as steel can be reduced in the preliminary reducing furnace and transferred to the analyzing furnace, for example, by a magnetic force, a gripping unit or a transporting sample body holder. A controller can control the application of heat and the mixing of a metal flux to provide discharge gas to an analyzer.

Contained oxygen analyzing apparatus and contained analyzing method

The present invention provides a method for analyzing particulate matter in a gas for analyzing simply and with high precision the particulate matter in an engine emission and an apparatus therefor by which dry soot, SOF and sulfate in PM contained in an engine emission can be fractionated individually even in a trifle amount. The present invention further provides a carbon differentiating and analyzing apparatus capable of differentiating and analyzing with precision the organic carbon and the elemental carbon contained in a sample and capable of performing a predetermined analysis with precision in a short time by reducing the period of time required for the analysis. The present invention is constituted such that a heating furnace is provided with a filter which has caught PM contained in engine emission. The filter is heated at a predetermined temperature while passing an inert gas into the heating furnace to evaporate the SOF and sulfate contained in PM. The evaporated SOF is oxidized into CO and the evaporated sulfate is reduced into SO . The CO and SO are analyzed with a gas analyzer unit, and thereafter, the filter is heated while passing oxygen into the heating furnace to oxidize the PM remaining on the filter to have it generate CO . The CO is analyzed with the. gas analyzer unit. The present invention is constituted such that a thermal decomposition tube includes, successively from its upstream side a carrier gas inlet, a low temperature heating portion for evaporating organic carbon in the sample, and a high temperature heating portion for thermally decomposing elemental carbon in the sample, whereby the organic carbon is separated in the low temperature heating portion and the elemental carbon is separated in the high temperature heating portion.

Apparatus and method for analyzing particulate matter in gas and apparatus and method for carbon differentiating

A heat melting type gas extraction apparatus is employed to measure oxygen in a silicon sample. A double graphite crucible is first heated, in the absence of the sample or a flux metal, to extract oxygen therein. The flux metal is then added to the crucible and heated to extract oxygen therein. The sample is then added, melted, and heated to produce a sample gas for analysis.

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Kyoto, Japan

Hiroshi Uchihara