Mass analysis device
AssigneeShimadzu Corporation
InventorYutaro YAMAMURA
Life of this patent
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Abstract
A mass analysis device capable of reliably detecting the peak in a mass chromatogram of a given m/z is equipped with a control unit, which generates a mass chromatogram and total ion chromatogram. The control unit includes a determination unit which, using the total ion chromatogram, determines the start time and end time of the peak in the total ion chromatogram by searching for the peak based on maximum value of detected intensity and searching for peak start time and end time based on slope of change of detected intensity; and a detection unit, which detects the peak in the mass chromatogram by making the start time and end time of the peak in the mass chromatogram the same as the start time and end time of the peak in the total ion chromatogram.
Claims18
A mass analysis device, comprising;
- an ionization source which ionizes a sample
- a mass analysis unit into which ions are introduced from said ionization source;
- and
- a control unit which, based on the information acquired by said mass analysis unit, generates a mass chromatogram representing the relationship between detected intensity and time for ions of a given m/z and a total ion chromatogram representing the relationship between detected intensity and time for all ions,
- wherein said control unit comprises a determination unit which, using said total ion chromatogram, determines the start time and end time of the peak in said total ion chromatogram by searching for the peak based on maximum value of detected intensity and searching for peak start time and end time based on slope of change of detected intensity;
- and
- a detection unit which detects the peak in said mass chromatogram by making the start time and end time of the peak in said mass chromatogram the same as the start time and end time of the peak in said total ion chromatogram.
A mass analysis method, comprising;
- ionizing a sample by an ionization source,
- introducing ions into a mass analysis unit from said ionization source;
- generating by a control unit a mass chromatogram representing the relationship between detected intensity and time for ions of a given m/z and a total ion chromatogram representing the relationship between detected intensity and time for all ions based on the information acquired by said mass analysis unit,
- determining by the control unit the start time and end time of the peak in said total ion chromatogram by searching for the peak based on maximum value of detected intensity and searching for peak start time and end time based on slope of change of detected intensity using said total ion chromatogram;
- and
- detecting the peak in said mass chromatogram by making the start time and end time of the peak in said mass chromatogram the same as the start time and end time of the peak in said total ion chromatogram.
Dependencies are inferred from the claim text.