摘要:
A gas monitoring apparatus includes a sample introducing portion, a measurement portion, an ionization portion, a mass analysis portion, a data processing portion and a display. The sample introducing portion introduces a sample gas including an object material to be measured. The measurement portion measures a concentration of a predetermined coexisting material, which coexists with the object material in the sample gas. The ionization portion ionizes the sample gas. The mass analysis portion analyzes mass of an ion produced by the ionization portion. The data processing portion analyzes signals detected by the mass analysis portion to calculate a concentration of the object material. And the display displays results of analysis conducted by the data processing portion. The data processing portion includes an adjustment portion which adjusts the concentration of the object material according to the concentration of the predetermined coexisting material.
摘要:
A mass spectrometer having an ion source section capable of creating positive ions and negative ions at high efficiency. The ion source is comprised of an ion source section for creating ions of a sample gas, a mass spectrometric section for conducting mass separation of created ions, linear RF generating multipole electrodes, magnetic fields generation means, a sample gas introduction system, a reaction gas introduction system and an electron source in which the linear RF generating multipole electrodes generate linear RF multipole electric fields. A static magnetic fields is applied in parallel on the center axis where the linear RF multipole electric fields are zero. A sample gas and a reagent gas are introduced into the ion source section. Electrons are injected for creating reaction of the positive ions or negative ions.
摘要:
A mass spectrometer having an ion source section capable of creating positive ions and negative ions at high efficiency. The ion source is comprised of an ion source section for creating ions of a sample gas, a mass spectrometric section for conducting mass separation of created ions, linear RF generating multipole electrodes, magnetic fields generation means, a sample gas introduction system, a reaction gas introduction system and an electron source in which the linear RF generating multipole electrodes generate linear RF multipole electric fields. A static magnetic fields is applied in parallel on the center axis where the linear RF multipole electric fields are zero. A sample gas and a reagent gas are introduced into the ion source section. Electrons are injected for creating reaction of the positive ions or negative ions.
摘要:
Firstly, the following check chip is set up into a heater: A check chip onto which a sample has been picked up by wiping out the surface of a check target, or a check chip formed by absorbing and collecting the sample into a filter. Here, the filter has been set up in a vibration-type or heating-type portable-type absorption probe in an attachment/detachment-capable manner. Secondly, a sample gas generated from the heated check chip is analyzed using a tandem-type mass spectrometer. This makes it possible to simplify the sample pick-up from various types of check targets, and to shorten the pick-up time and the checking time.
摘要:
An apparatus for detecting chemical substances which is high in sensitivity and selectivity is provided. An organic acid or an organic acid salt is used to generate an organic acid gas from an organic acid gas generator to be mixed with a sample gas for introduction into an ion source for ionization, thereby obtaining a mass spectrum by a mass analysis region. A data processor determines the detection or non-detection of a specific m/z of an organic acid adduct ion obtained by adding a molecule generated from the organic acid to a molecule with specific m/z generated from a target chemical substance to be detected based on the obtained mass spectrum. When there is an ion peak with the m/z of the organic acid adduct ion, the presence of the target chemical substance to be detected is determined, and an alarm is sounded. False detection can be prevented.
摘要:
A mass spectrometer capable of analysis at high speed and high accuracy comprising a device for applying a high frequency signal not containing resonance frequencies for plural precursor ions but containing resonance frequencies of other ions, and having different amplitudes on every frequencies to an electrode constituting the mass spectrometer thereby controlling the selection for the plural precursor ions, and a device for applying a high frequency signal having amplitudes set individually on every resonance frequencies of the plural precursor ions and superimposed with the resonance frequencies for the plural precursor ions to the electrode constituting the mass spectrometer thereby controlling the dissociation of the plural precursor ions, and judging the presence or absence of the aimed chemical substance based on the mass spectra of the obtained by dissociating the plural fragment ions.
摘要:
A method and apparatus for analyzing vapors generated from explosives in which vapors containing nitrogen monoxide and/or nitrogen dioxide are generated by decomposing explosives by increasing the temperature of the explosives, primary ions and neutral molecules are generated from air. The generated primary ions and the nitrogen monoxide and/or nitrogen dioxide contained in the generated vapors are allowed to react with each other in an area inhibited or prevented from being penetrated by the generated neutral molecules, and the nitrogen monoxide and/or nitrogen dioxide contained in the generated vapors is ionized. The ionized nitrogen monoxide and/or nitrogen dioxide is subjected to mass spectrometry, and an amount of the nitrogen monoxide and/or nitrogen dioxide contained in the generated vapors by decomposing the explosives is determined.
摘要:
To provide a mass spectrometer having a high sensitivity to dioxins. In the mass spectrometer including: a sample supply tube for supplying a sample solution containing a sample to be measured; a nebulizer for nebulizing the sample solution supplied from the sample supply tube; an ion source having a needle electrode for ionizing the sample nebulized and vaporized in the nebulizer; and a mass analyzer for analyzing ions formed in the ion source, and a gas of a flow rate corresponding to the flow rate of the sample solution is mixed to the vaporized sample, and a moving direction of the sample is made opposite to a moving direction of ions at a tip of the needle electrode.
摘要:
An object is to measure both cations and anions with high duty cycle. In a mass spectrometer comprising an ion source (1), an ion guide part (31), and an ion trap (32), while ions are being mass-selectively ejected from the ion trap, ions having a polarity reverse to that of the ions trapped in the ion trap are introduced into the ion guide part.
摘要:
Mass transit terrorism is prevented to construct a safe society. Individual explosive sensing devices are connected by a network to establish a security system. Information collected in the security center is compared with a database to determine a risk. When the risk exceeds a predetermined level upon determination of the risk, measures may be taken such that an alarm is activated and instructions for making a security guard carry out the parcel inspection of the person causing the risk are transmitted to the security guard. According to the present invention, the security can be enhanced while the social life is still convenient even when the explosive sensing device having a high throughput is employed at places such as mass transit where many people gather. Therefore, the terror risk on the mass transit can be reduced to contribute to construction of the safe society.