Time-of-flight analyzer

Inactive Publication Date: 2006-01-26
SHIMADZU CORP
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Benefits of technology

[0030] The start signal given externally from the controller and the analog to digital conversion of the signal are not synchronized. But the analog to digital conversion and the trigger signal to the ion source are both synchronized with the internal clock because signals are processed in synchronism with the internal clock. So, the timing to start acceleration of ions in the ion source and the timing to start sampling and recording of the ion signal are synchronized. This alleviates the above-described problem of the conventional time-of-flight analyzer by eliminating a timing error of one clock cycle at most.
[0031] Thus, according to the time-of-flight analyzer of the present invention, the trigger signal for representing a start of data sampling in the ion

Problems solved by technology

Since, as described above, in conventional TOF mass spectrometers, the timing of start acceleration of ions in the ion source and the clock of the ion signal recorder are not synchronized, the timing to

Method used

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Embodiment Construction

[0039] A high performance liquid chromatograph ion trap time-of-flight mass spectrometer (LC-IT-TOFMS) embodying the present invention is described. FIG. 5 is a schematic diagram of the main part of the LC-IT-TOFMS.

[0040] The high performance liquid chromatograph (LC) 1 is an analyzer where a liquid sample is injected, and its components are ejected at different timings according to their properties. In the LC-IT-TOFMS of the present embodiment, the LC 1 is used as a preparatory device of the mass spectrometer. The components of the liquid sample ejected from the LC 1 in time-series are ionized in an ion introduction optics 2, and the ions are injected into the vacuum space. The ion introduction optics 2 includes an ionizing probe and an ion guide. Ionizing probes such as an electrospray ionizing probe or an atmospheric pressure chemical ionizing probe are used to ionize the component, wherein the liquid component is broken into tiny droplets, the droplets are then dried, and are give

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Abstract

In order to provide a time of flight analyzer in which the timings of the ion generation and the ion signal recorder are synchronized, and the peak center position can be determined at high accuracy with fewer measurements, the time of flight analyzer of the present invention includes an ion source and an ion signal recorder working on an internal clock, wherein the ion signal recorder generates a trigger signal in synchronism with the internal clock in order to generate ions in the ion source. Since the timing of accelerating ions in the ion source and the timing of digital sampling and recording of the ion signal, which is detected in the ion detector, in the ion signal recorder are synchronized, the timing error occurred in conventional methods can be suppressed.

Description

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Claims

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Application Information

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Owner SHIMADZU CORP
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