Patent application number | Description | Published |
20080283741 | Sample introduction device for mass spectroscope - A sample solution introduction device for a mass spectroscope includes a container device including a container having an opening at a top portion thereof and a blocking plug for blocking the opening, a gas supply device for supplying predetermined gas into the container, a first inner container provided inside the container, and an inner container supporting device for suspending and supporting the first inner container to the blocking plug. A liquid transmission pipe passes through the blocking plug. The liquid transmission pipe has one end to be soaked in a liquid sample inside the first inner container, and the other end located outside the container. The liquid sample is pushed by gas pressure supplied by the gas supply device. | 11-20-2008 |
20100012835 | MS/MS MASS SPECTROMETER - The inside of the collision cell | 01-21-2010 |
20100012836 | QUADRUPOLE MASS SPECTROMETER - The direct current bias voltage to be applied to the pre-filter | 01-21-2010 |
20100059675 | MASS SPECTROMETER - An object of the present invention is to provide a mass spectrometer having an optical ion transport system where the efficiency for generating and converting fragment ions can be increased, and which can transport the generated fragment ions efficiently to the rear stage, and in order to achieve this object, the mass spectrometer for ionizing a sample in an ionization chamber | 03-11-2010 |
20100102217 | MS/MS MASS SPECTROMETER - The length of the collision cell ( | 04-29-2010 |
20100193684 | QUADRUPOLE MASS SPECTROMETER | 08-05-2010 |
20110036976 | Atmospheric Pressure Ionization Mass Spectrometer - The present invention aims at suppressing noises when a mass analysis is performed by introducing a sample solution into an atmospheric pressure ion source by a pressurized liquid feeding method. As a dilution solvent of the sample solution contained in a sample container, a mixed liquid is used in which the mixture ratio of an organic solvent such as methanol is decreased to 20% and the ratio of water is 80%. Since nitrogen, which is a gas for the pressurization, is soluble in an organic solvent, decreasing the ratio of the organic solvent lowers the saturated dissolution amount and suppresses unstable emergence of the gas in the process of the mass analysis. Consequently, even after the elapse of a considerable length of time from the start of liquid feeding, spike-like noises do not appear in the ion intensity, which stabilizes the ion intensity. | 02-17-2011 |
20110062325 | Quadropole Mass Spectrometer - If a scanning rate of a mass scanning is set to be high, the amount of change in an applied voltage between a time of an incidence of a certain ion into a quadrupole mass filter and a time of an emission of the ion therefrom increases. This leads to a change in the condition of a passage of ions, causing the amount of ions to decrease and thereby deteriorating detection sensitivity. In order to avoid this problem, according to the present invention, the values of direct current voltage U and an amplitude V of radio-frequency voltage, both voltages being applied to rod electrodes during a mass scanning, are respectively determined so that a voltage ratio U/V of the voltage U to the amplitude V becomes smaller as the scanning rate becomes higher. Accordingly, in a stability diagram based on the Mathieu equation, the inclination of line L indicating the change in the applied voltage during the mass scanning becomes gradual and the amount of ions passing through the quadrupole mass filter increases particularly when the mass is high. | 03-17-2011 |
20110073756 | Quadrupole Mass Spectrometer - In a scan measurement in which a mass scan is repeated across a predetermined mass range, when a voltage is returned from a termination voltage of one scan to an initiation voltage for the next scan, an undershoot or other drawbacks occur to destabilize the voltage value. Therefore, an appropriate waiting time is required. Conventionally, this waiting time has been set to be constant regardless of the analysis conditions. On the other hand, in the quadrupole mass spectrometer according to the present invention, the mass difference ΔM between the scan termination mass and the scan initiation mass is computed based on the specified mass range, and a different settling time is set in accordance with this mass difference. When the mass difference ΔM is small and hence requires only a short voltage stabilization time, a relatively short settling time is set. This shortens the cycle period of the mass scan, which increases the temporal resolution. | 03-31-2011 |
20110101221 | Quadrupole Mass Spectrometer - In a scan measurement in which a mass scan is repeated across a predetermined mass range, when a voltage is returned from a termination voltage of one scan to an initiation voltage for the next scan, an undershoot or other drawbacks occur to destabilize the voltage value. Therefore, an appropriate waiting time is required. Conventionally, this waiting time has been set to be constant regardless of the analysis conditions. On the other hand, in the quadrupole mass spectrometer according to the present invention, the mass difference ΔM between the scan termination mass and the scan initiation mass is computed based on the specified mass range, and a different settling time is set in accordance with this mass difference. When the mass difference ΔM is small and hence requires only a short voltage stabilization time, a relatively short settling time is set. This shortens the cycle period of the mass scan, which increases the temporal resolution. | 05-05-2011 |
20130284919 | CHROMATOGRAPH MASS SPECTROMETER - When an SIM measurement for ions originating from a target component separated by a chromatograph is performed, the measurement is performed while the mass-resolving power is switched among a plurality of levels of resolving power, with the mass-to-charge ratio fixed at a target value (S | 10-31-2013 |
20140299762 | QUANTITATIVE ANALYSIS METHOD USING MASS SPECTROMETER - In an MS unit, both an intensity of an ion having the highest intensity among the ions originating from a compound as the target of quantitative determination and an intensity of an isotopic ion are measured. A saturation detector determines whether or not digital data produced by an A/D converter from ion-intensity signals have reached a saturation level. A data selection controller selects the ion-intensity data showing the highest intensity when the signal is not saturated or the intensity data of the isotopic ion when the saturation has occurred or is probable to occur. When the latter data is selected, an ion intensity converter converts the intensity data into values corresponding to the intensity data of the highest-intensity ion by multiplying the intensity data by a factor calculated from a known isotopic abundance ratio. | 10-09-2014 |