Abstract:
A gas component collector comprises a filter assembly 3 comprising an adsorbent and an adsorbent holding plate having a first face, a second face and a plurality of holes that are bored through from the first face to the second face and are filled with the adsorbent adsorbing at least one gas component to be analyzed, the filter assembly satisfying (AL−V)2/L3≧0.003 mm3 and V/AL≧0.3, where V is a total volume of the adsorbent, A is a sum of an opening areas of the holes, and L is an average length of the holes, and a holding container 2 housing the filter assembly 3. On at least one of the holding container 2 a first opening portion for introducing gas and a second opening portion for allowing the introduced gas to be discharged are formed.
Abstract:
An analyzer carrying out analysis with a high degree of qualitative accuracy by separating impurities which hinder the analysis while analyzing in real time. An introducing tube is branched with one branched tube directly leading to an ion source for real time analysis. The other branched tube leads to the ion source so as to introduce the sample gas into the ion source at a later time. When a result of the real time analysis shows that a spectrum pattern on a MS spectrum is changed and an increase in the concentration of an impurity is observed, the introducing path for the sample gas is changed so that the sample gas is introduced into the ion source after the impurity is separated at the separation part.
Abstract:
A mass spectrometer capable of measuring under switching two ion sources at different pressure levels in which a sample gas separated by GC column is branched, and separately introduced to a first ion source (for example, APCI ion source) and a second ion source (for example, EI ion source) at a pressure level lower than that of the first ion source respectively. Preferably, the flow rate of the sample gas introduced to the APCI ion source is made more than the flow rate of the sample gas introduced to the EI ion source, so that the pressure for each of the ion sources can be maintained and analysis can be conducted by each ionization at a good balance in view of the sensitivity.
Abstract:
A gas component collector comprises a filter assembly 3 comprising an adsorbent and an adsorbent holding plate having a first face, a second face and a plurality of holes that are bored through from the first face to the second face and are filled with the adsorbent adsorbing at least one gas component to be analyzed, the filter assembly satisfying (AL−V)2/L3≧0.003 mm3 and V/AL≧0.3, where V is a total volume of the adsorbent, A is a sum of an opening areas of the holes, and L is an average length of the holes, and a holding container 2 housing the filter assembly 3. On at least one of the holding container 2 a first opening portion for introducing gas and a second opening portion for allowing the introduced gas to be discharged are formed.
Abstract:
A mass spectrometer has an atmospheric pressure chemical ionization source that includes a first ionization portion including a needle electrode, for generating a primary ion by discharge of the needle electrode a primary ion introduction aperture, and a second ionization portion including an introduction aperture, for generating a sample ion by the reaction between the primary ion and the sample gas introduced from an end of a column of gas chromatography, a sample ion movement aperture; and a mass analysis portion; wherein the end is arranged at a position satisfying the relation r≦2R where R is a radius of an inner diameter of the aperture and r is a distance between an axis connecting the center of the aperture and the center of the aperture, and the end.
Abstract:
An explosive detection system in which vapor leaking from luggage is sampled by a sampling probe, negative corona discharge is used to ionize the vapor, and a mass spectrometer is used to detect the ionized vapor, thereby judging whether an explosive is present or not.
Abstract:
An analyzer performs dielectric barrier discharge and ionization of a sample by a reaction between the sample and excited molecules or ions generated by the dielectric barrier discharge at a pressure lower than an atmospheric pressure.
Abstract:
A mass spectrometer including a sample attaching member of attaching a sample, an ionizing chamber including an introductory port of the sample attaching member and an ionization source of generating a sample ion, a vacuumed chamber having a mass analyzer of analyzing the sample ion, and an opening/closing mechanism provided between the ionizing chamber and the vacuumed chamber, in which the opening/closing mechanism is controlled from a closed state to an open state after introducing the sample attaching member into the ionizing chamber to thereby enable to perform ionization with inconsiderable fragmentation at a high sensitivity with a high throughput
Abstract:
A mass spectrometer of reduced size and weight is provided which is capable to conduct highly accurate mass spectroscopy. The mass spectrometer includes an ion source adapted to ionize gas flowing in from outside in order to ionize a measurement sample and a mass spectroscopy section for separating the ionized measurement sample. The ion source has its interior reduced in pressure by differential pumping from the mass spectroscopy section and ionizes the gas when the interior pressure rises as it inhales the gas, and the mass spectroscopy section separates the ionized measurement sample when its interior pressure falls after inhale of the gas. The mass spectrometer may further include a restriction device for suppressing a flow rate of the gas the ion source inhales and an open/close device for opening and closing a flow of the gas the ion source inhales.
Abstract:
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.