Abstract: The present invention has an object of providing an arithmetic apparatus, a facility management method, and a program that make it possible to acquire current tension applied to outdoor structures in a short period of time and make a bearing determination. The arithmetic apparatus according to the present invention calculates the dip degree of a cable and a distance between poles from the 3D model data of the cable according to Math. C1 and calculates the tension of each cable between the poles from the dip degree, the distance between the poles, and the weight of the cable per unit length according to Math. C2 (when no wind blows) or Math. C4 (when wind blows). Further, the arithmetic apparatus according to the present invention calculates a combined load obtained by converting the tension and the load of the accessory of the poles into an arbitrary position on the poles according to Math. C3.

Abstract: A member is disposed along a flight path of ions in a mass spectrometer in which ions accelerated by an electric field are made to fly freely, and are separated and detected with respect to each mass-to-charge ratio depending on the time of flight taken by each ion to reach a detector. The member includes: a first portion having length L1 along the flight path; and a second portion disposed adjacent to the first portion along the flight path, is made of a material different from the material for the first portion, and has length L2 along the ion flight path. L1 and L2 are set to satisfy L1×?1+L2×?2=0, where ?1 is the linear expansion coefficient of the material for the first portion along the flight path, and ?2 is the linear expansion coefficient of the material for the second portion.

Abstract: The present invention provides a mass spectrometer having an ion lens capable of transporting an ion having a large mass to charge ratio with a high level of ion-passing efficiency even under a low-vacuum atmosphere. In conventional atmospheric pressure ionization mass spectrometers or similar mass spectrometers, applying an excessively high voltage to the ion lens undesirably causes an electric discharge. Therefore, the passing efficiency for an ion having a large mass to charge ratio cannot be adequately improved, which leads to a poor detection sensitivity. To solve this problem, the mass spectrometer according to the present invention includes a voltage controller 21 that controls a variable radiofrequency (RF) voltage generator 24 so that both the amplitude and the frequency of the RF voltage applied to the lens electrodes of an ion lens 5 are changed according to the mass to charge ratio of an ion to be analyzed.

Abstract: The present invention provides a mass spectrometer having an ion lens capable of transporting an ion having a large mass to charge ratio with a high level of ion-passing efficiency even under a low-vacuum atmosphere. In conventional atmospheric pressure ionization mass spectrometers or similar mass spectrometers, applying an excessively high voltage to the ion lens undesirably causes an electric discharge. Therefore, the passing efficiency for an ion having a large mass to charge ratio cannot be adequately improved, which leads to a poor detection sensitivity. To solve this problem, the mass spectrometer according to the present invention includes a voltage controller 21 that controls a variable radiofrequency (RF) voltage generator 24 so that both the amplitude and the frequency of the RF voltage applied to the lens electrodes of an ion lens 5 are changed according to the mass to charge ratio of an ion to be analyzed.

Abstract: An atmospheric pressure ionization mass spectrometry system has an atmospheric pressure ionization chamber for ionizing a sample, an evacuated intermediate evacuation chamber into which generated ions are introduced through a capillary tube, and a vacuum chamber further downstream therefrom into which ions are introduced for mass separation. A partition wall separating the atmospheric pressure ionization chamber from the intermediate evacuation chamber includes a small orifice having a diameter corresponding to an internal channel diameter of the capillary tube. The capillary tube is detachably installed on the partition wall so that an outlet end of the capillary tube abuts on the small orifice. The internal channel of the capillary tube is in communication with the small orifice. The capillary tube can be installed and removed from the system without breaching the vacuum.

Abstract: A liquid chromatography/mass spectrometry apparatus combines a chromatograph having a liquid delivery part for delivering mixed multiple solvents, and a mass spectrometer having an ionization part for spraying and ionizing. The apparatus has a storing part for storing a relationship between a mixture ratio of the multiple solvents in the liquid delivery part and an optimal or nearly optimal voltage applied to the ionization part, a ratio information acquiring part for computing the mixture ratio over time, a voltage value computing part for computing the optimal or nearly optimal applied voltage at any point, and a voltage controlling part for changing the voltage applied to the ionization part over time. By virtue of the ability to adjust the applied voltage during analysis, the ionization efficiency is always high, and the analysis can be performed with high sensitivity for all of the multiple components in the liquid sample.

Abstract: The preparative liquid chromatograph uses a plurality of detectors including a mass spectrometer, and a chromatogram generator is provided for generating a plurality of chromatograms each corresponding to each of the plurality of detectors. The plurality of chromatograms are converted into a respective binary signal by comparing the chromatogram with a predetermined threshold, and a logical operator performs a binary operation on the plurality of respective binary signals, whereby a resultant binary signal is generated. A separation controller controls the fraction collector of the preparative liquid chromatograph based on the resultant binary signal to separate components from a sample. When “AND” is used as the binary operation, the resultant binary signal is “1” only when all the respective binary signals are “1”. This assures a high precision, high purity separation where an impurity mingling is minimized.

Abstract: An atmospheric pressure ionization mass spectrometry system has an atmospheric pressure ionization chamber for ionizing a sample, an evacuated intermediate evacuation chamber into which generated ions are introduced through a capillary tube, and a vacuum chamber further downstream therefrom into which ions are introduced for mass separation. A partition wall separating the atmospheric pressure ionization chamber from the intermediate evacuation chamber includes a small orifice having a diameter corresponding to an internal channel diameter of the capillary tube. The capillary tube is detachably installed on the partition wall so that an outlet end of the capillary tube abuts on the small orifice. The internal channel of the capillary tube is in communication with the small orifice. The capillary tube can be installed and removed from the system without breaching the vacuum.

Abstract: A liquid chromatography/mass spectrometry apparatus combines a chromatograph having a liquid delivery part for delivering mixed multiple solvents, and a mass spectrometer having an ionization part for spraying and ionizing. The apparatus has a storing part for storing a relationship between a mixture ratio of the multiple solvents in the liquid delivery part and an optimal or nearly optimal voltage applied to the ionization part, a ratio information acquiring part for computing the mixture ratio over time, a voltage value computing part for computing the optimal or nearly optimal applied voltage at any point, and a voltage controlling part for changing the voltage applied to the ionization part over time. By virtue of the ability to adjust the applied voltage during analysis, the ionization efficiency is always high, and the analysis can be performed with high sensitivity for all of the multiple components in the liquid sample.

Abstract: The preparative liquid chromatograph uses a plurality of detectors including a mass spectrometer, and a chromatogram generator is provided for generating a plurality of chromatograms each corresponding to each of the plurality of detectors. The plurality of chromatograms are converted into a respective binary signal by comparing the chromatogram with a predetermined threshold, and a logical operator performs a binary operation on the plurality of respective binary signals, whereby a resultant binary signal is generated. A separation controller controls the fraction collector of the preparative liquid chromatograph based on the resultant binary signal to separate components from a sample. When “AND” is used as the binary operation, the resultant binary signal is “1” only when all the respective binary signals are “1”. This assures a high precision, high purity separation where an impurity mingling is minimized.

Abstract: A mass spectrograph has an ionization chamber for ionizing a sample, a skimmer in a conical shape with an orifice and a bottom opening, an analyzing chamber at a lower pressure than inside the ionization chamber such that ions generated in the ionization chamber are pulled through the orifice into the analyzing chamber, and a multi-pole ion guide disposed proximally behind the skimmer. The ion guide has an even number of cylindrically shaped electrodes all elongated in the axial direction of the skimmer and the ion guide and disposed so as to circumscribe an inscribed circle and such that the conical surface of the skimmer, when extended, intersects the internally facing side surfaces of the electrodes, not their front surfaces facing the skimmer. Thus, the generated ions can reach the analyzing chamber more efficiently.

Abstract: In a liquid chromatograph mass spectrometer, a solvent removing tube provided substantially horizontally between a spray chamber and a subsequent chamber is bent at an obtuse angle such that an entrance side of the tube is directed downwardly, and a nozzle is disposed such that a spraying direction of the nozzle is directed substantially downwardly and is approximately perpendicular to a central axis of the entrance side of the tube. Further, a drain for droplet or liquid is provided in front of the spraying direction of the nozzle. Since the spraying direction is oblique to a partition wall, the droplet or liquid sprayed from the nozzle collides against the drain, so that the droplet do not bounce to the entrance side of the solvent removing tube. Accordingly, the noise can be prevented, and the memory effect is also reduced in a high-density sample, so that an accurate analysis can be conducted.

Abstract: In a mass spectrometer, electrode element plates forming a virtual rod electrode have predetermined shapes at rim portions thereof in an ion optical axis side, and the electrode element plates are held at portions away from the ion optical axis by a holder, to thereby form a virtual rod multipole ion lens unit. Also, apart from the ion lens unit, there is provided a terminal unit for applying predetermined voltages to the respective electrode element plates. In the ion lens unit, the electrode element plates to which the same potential is applied are respectively connected by immovable short lines to form the groups. One of the electrode element plates in each group is electrically connected to the terminal unit.

Abstract: A mass spectrometer according to the present invention includes an ion lens composed of an even number of virtual rod electrodes 31, 32 positioned separately around the ion beam axis C, where each of the virtual rod electrodes is composed of a plurality of separate metallic plate electrodes aligned in a row. For example, the virtual rod electrode 32 consists of five lens electrodes 321-325 aligned in a row parallel to the ion beam axis C. A voltage composed of a DC voltage and a high frequency AC voltage superimposed thereon is applied to each of the plate electrodes 321-325, where the DC voltage is changed according to the position of the plate electrode while the high frequency AC voltage is the same irrespective of the position. Ions travelling through the ion lens oscillates transversally due to the electric field generated by the high frequency AC voltage and converge on the focal point F of the ion lens.

Abstract: A mass spectrograph has an ionization chamber for ionizing a sample, a skimmer in a conical shape with an orifice and a bottom opening, an analyzing chamber at a lower pressure than inside the ionization chamber such that ions generated in the ionization chamber are pulled through the orifice into the analyzing chamber, and a multi-pole ion guide disposed proximally behind the skimmer. The ion guide has an even number of cylindrically shaped electrodes all elongated in the axial direction of the skimmer and the ion guide and disposed so as to circumscribe an inscribed circle and such that the conical surface of the skimmer, when extended, intersects the internally facing side surfaces of the electrodes, not their front surfaces facing the skimmer. Thus, the generated ions can reach the analyzing chamber more efficiently.

Abstract: In a mass spectrometer, electrode element plates forming a virtual rod electrode have predetermined shapes at rim portions thereof in an ion optical axis side, and the electrode element plates are held at portions away from the ion optical axis by a holder, to thereby form a virtual rod multipole ion lens unit. Also, apart from the ion lens unit, there is provided a terminal unit for applying predetermined voltages to the respective electrode element plates. In the ion lens unit, the electrode element plates to which the same potential is applied are respectively connected by immovable short lines to form the groups. One of the electrode element plates in each group is electrically connected to the terminal unit.

Abstract: In a liquid chromatograph mass spectrometer, a solvent removing tube provided substantially horizontally between a spray chamber and a subsequent chamber is bent at an obtuse angle such that an entrance side of the tube is directed downwardly, and a nozzle is disposed such that a spraying direction of the nozzle is directed substantially downwardly and is approximately perpendicular to a central axis of the entrance side of the tube. Further, a drain for droplet or liquid is provided in front of the spraying direction of the nozzle. Since the spraying direction is oblique to a partition wall, the droplet or liquid sprayed from the nozzle collides against the drain, so that the droplet do not bounce to the entrance side of the solvent removing tube. Accordingly, the noise can be prevented, and the memory effect is also reduced in a high-density sample, so that an accurate analysis can be conducted.

Abstract: An electrospray ionizer which enables the operator to adjust the position of the glass capillary with respect to the metal tube to which a high voltage is applied while the sample solution is being nebulized and ionized at the fore end of the glass capillary. The electrospray ionizer is composed of: a glass capillary for allowing the sample solution to flow out from its fore end; a metal tube surrounding the fore end part of the glass capillary for generating an irregular electric field at around the fore end of the glass capillary; a first pipe, or a guide pipe, made of a non-conductive material for holding the back end of the metal tube and extending backward; a second pipe, or a seal pipe, for loosely holding the glass capillary further back along the first pipe; and a joint for connecting the first pipe and the second pipe. Consequently, the position of the glass capillary is loosely fixed with respect to the metal tube.

Abstract: A quadrupole mass filter, or a multiple-pole mass filter in general, composed of a cylindrical main body made of an insulating material and having a star-shaped cross-sectional profile whose inward bulges are curved substantially hyperbolic, and four electrode layers of a high melting point metal deposited by a chemical vapor deposition (CVD) process. The four electrode layers are separated at the outward bulges of the star-shaped cross-sectional profile. The quadrupole mass filter has pre-rod electrodes.

Abstract: A mass spectrometric apparatus receives a liquid sample from a liquid chromatograph, ionizes it under an atmospheric condition and guides these ions from the liquid sample along a specified trajectory through one or more intermediate vacuum chambers to a mass analyzer kept inside a high vacuum chamber. At least one of these intermediate vacuum chambers is kept in an intermediate vacuum condition in the so-called viscous flow region and contains at least one pair of mutually separated planar electrodes sandwiching the trajectory. Voltages of the same polarity as that of the ions which are passed through are adjustably applied to the electrodes so as to form a converged ion beam and also to control its trajectory. Two mutually perpendicular pairs of such electrodes may be disposed across the trajectory. Two sets each with two such pairs of electrodes may be disposed across the trajectory.