WO2015132861A1 - クロマトグラフ質量分析装置用データ処理装置及びプログラム - Google Patents
クロマトグラフ質量分析装置用データ処理装置及びプログラム Download PDFInfo
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8658—Optimising operation parameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/72—Mass spectrometers
- G01N30/7233—Mass spectrometers interfaced to liquid or supercritical fluid chromatograph
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8624—Detection of slopes or peaks; baseline correction
- G01N30/8631—Peaks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8675—Evaluation, i.e. decoding of the signal into analytical information
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/0027—Methods for using particle spectrometers
- H01J49/0031—Step by step routines describing the use of the apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/0027—Methods for using particle spectrometers
- H01J49/0036—Step by step routines describing the handling of the data generated during a measurement
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- the present invention relates to a data processing apparatus and program for a chromatograph mass spectrometer, which is formed by connecting a chromatograph such as a liquid chromatograph or a gas chromatograph and a mass spectrometer.
- each component in a sample is temporally separated by a chromatograph, and each component eluted from the chromatograph is sequentially analyzed by a mass spectrometer to obtain a mass spectrum.
- Three-dimensional data consisting of three axes of mass-to-charge ratio and signal intensity (output voltage, etc.) is acquired (see, for example, Patent Document 1).
- the data processor for a chromatograph mass spectrometer detects a peak appearing on such three-dimensional data, and corresponds to the peak from the peak position (retention time and mass to charge ratio) with reference to a preset identification table. Identify the substance.
- a mass chromatogram of the mass-to-charge ratio peculiar to the target component to be quantified (that is, a graph in which time is plotted on the horizontal axis and signal intensity is plotted on the vertical axis) is created from the three-dimensional data. Then, the height and area of the peak appearing in the retention time of the target component are measured on the mass chromatogram. Then, the concentration and amount of the target compound are calculated with reference to a calibration curve showing the relationship between the peak area value and the concentration (content) of the target compound, which are created in advance based on the result of measuring a standard sample and the like.
- ion detection by a mass spectrometer has a problem that the reliability of detection results varies depending on the level of the signal. For example, if the component concentration in the sample is too low, the quantification accuracy deteriorates due to the influence of noise in the detection signal. Resulting in. Therefore, the analysis in the conventional chromatograph mass spectrometer is performed by appropriately diluting the sample so that the component concentration in the sample is within a predetermined range (dynamic range).
- the sample concentration and detector sensitivity so that all target components are within the dynamic range. That's fine.
- the signal of the maximum density component principal component
- the minimum density component impurity
- the present invention has been made in view of the above points, and its object is to provide chromatographic mass spectrometry capable of quantifying a target component without being affected by noise and nonlinearity of a detection signal.
- An object is to provide an apparatus data processing apparatus.
- a data processing apparatus for a chromatograph mass spectrometer made to solve the above-mentioned problems,
- a data processing device for a chromatograph mass spectrometer that creates a chromatogram based on a time change of a mass spectrum acquired for a mass-to-charge ratio range including a target mass-to-charge ratio used for quantification of a target component, a) a first mass chromatogram creating means for creating a first mass chromatogram showing a time change in signal intensity at the target mass to charge ratio; b) a mass spectrum corresponding to the appearance time of the peak top when the signal intensity of the peak top of the target peak that is a peak corresponding to the target component on the first mass chromatogram is equal to or higher than a predetermined threshold.
- a correction mass-to-charge ratio determination means for determining a peak mass-to-charge ratio indicating a signal intensity less than the threshold as a correction mass-to-charge ratio
- correction mass spectrum acquisition means for acquiring a correction mass spectrum that is a mass spectrum at a time when the signal intensity does not exceed the threshold value in the target peak
- sensitivity coefficient calculating means for calculating a sensitivity coefficient obtained by dividing the signal intensity of the target mass-to-charge ratio on the correction mass spectrum by the signal intensity of the correction mass-to-charge ratio on the correction mass spectrum
- corrected mass chromatogram creating means for creating a corrected mass chromatogram by multiplying the second mass chromatogram by the sensitivity coefficient; It is characterized by having.
- a chromatogram peak appears near the time at which the component appears (that is, retention time).
- the shapes of the chromatogram peaks are similar to each other (unless the signal is distorted or saturated).
- the similar shape means that one chromatogram is a shape obtained by enlarging or reducing another chromatogram in the direction of the vertical axis (intensity axis).
- the sensitivity obtained by dividing the signal intensity of the target mass-to-charge ratio on the correction mass spectrum by the signal intensity of the correction mass-to-charge ratio on the correction mass spectrum.
- the sensitivity coefficient By calculating the coefficient and multiplying the mass chromatogram relating to the mass-to-charge ratio of ions derived from the target component and having no influence of distortion or saturation (that is, the correction mass-to-charge ratio) by the sensitivity coefficient Create a corrected mass chromatogram.
- the sensitivity coefficient corresponds to the ratio of the signal intensity in the target mass-to-charge ratio and the correction mass-to-charge ratio.
- a data processing device for a chromatograph mass spectrometer that creates a chromatogram based on a time change of a mass spectrum acquired for a mass-to-charge ratio range including a target mass-to-charge ratio used for quantification of a target component, a) a first mass chromatogram creating means for creating a first mass chromatogram showing a time change in signal intensity at the target mass to charge ratio; b) a mass spectrum corresponding to the appearance time of the peak top when the signal intensity of the peak top of the target peak that is a peak corresponding to the target component on the first mass chromatogram is equal to or higher than a predetermined threshold.
- a correction mass-to-charge ratio determination means for determining a peak mass-to-charge ratio indicating a signal intensity less than the threshold as a correction mass-to-charge ratio
- correction mass spectrum acquisition means for acquiring a correction mass spectrum that is a mass spectrum at a time when the signal intensity does not exceed the threshold value in the target peak
- sensitivity coefficient calculating means for calculating a sensitivity coefficient obtained by dividing the signal intensity of the target mass-to-charge ratio on the correction mass spectrum by the signal intensity of the correction mass-to-charge ratio on the correction mass spectrum
- Corresponding peak height / area calculating means for calculating the height or area of the corresponding peak that is a peak on the second mass chromatogram that appears at the same time as the target peak
- correction peak height / area calculating means for calculating a correction peak height or correction peak area by multiply
- the sensitivity coefficient corresponds to the ratio of the signal intensity of the target mass to charge ratio to the signal intensity of the correction mass to charge ratio. Therefore, the height or area of the peak (corresponding peak) that appears near the retention time of the target component (that is, the appearance time of the target peak) on the mass chromatogram regarding the correction mass-to-charge ratio is derived, and the sensitivity coefficient is calculated as the value. By multiplying by, the original peak height or peak area (that is, no influence of distortion or saturation) in the target mass to charge ratio (that is, the corrected peak height or corrected peak area) can be obtained.
- the data processor for a chromatograph mass spectrometer according to the first or second invention, even when distortion or saturation occurs in the mass chromatogram at the target mass-to-charge ratio, distortion or saturation is caused.
- the mass chromatogram for the correction mass-to-charge ratio where there is no occurrence, create an original mass chromatogram at the target mass-to-charge ratio, or obtain the original peak height or peak area at the target mass-to-charge ratio. can do.
- FIG. 1 is a schematic configuration diagram of a sample analysis system including a data processing device for a chromatograph mass spectrometer according to Embodiment 1.
- FIG. The flowchart which shows the procedure of the process by the program for fixed_quantity
- the figure explaining the determination method of the mass-to-charge ratio for correction The figure which shows an example of the mass spectrum for correction
- FIG. 3 is a schematic configuration diagram of a sample analysis system including a data processing device for a chromatograph mass spectrometer according to a second embodiment.
- the flowchart which shows the procedure of the process by the program for fixed_quantity
- FIG. 1 is a schematic configuration diagram of a sample analysis system including a data processing apparatus for a chromatograph mass spectrometer according to the present embodiment.
- This sample analysis system includes a liquid chromatograph (LC) 11 that temporally separates components contained in a liquid sample, and a mass spectrometer (MS) 12 that analyzes each separated component within a predetermined mass-to-charge ratio range.
- LC-MS liquid chromatograph mass spectrometer
- system controller 20 connected to the LC-MS 10
- a device 30 is provided.
- the substance of the data processing device 30 is a computer such as a workstation or a personal computer.
- a central processing unit (CPU) 31 Central Processing Unit 31 has a memory 32, an input unit 33 including a keyboard and a mouse, an LCD (Liquid Crystal).
- the storage unit 40 stores an OS (Operating System) 41, a qualitative program 42, and a quantitative program 43 (a program according to the present invention) and a data storage unit 44.
- OS Operating System
- the data processing device 30 further includes an interface (I / F) 35 for controlling direct connection with an external device and connection with the external device via a network such as a LAN (Local Area Network).
- the interface 35 is connected to the LC-MS 10 via the network cable NW (or wireless LAN).
- a chromatogram creation unit 51 As related to the quantitative program 43, a chromatogram creation unit 51, a peak intensity determination unit 52, a spectrum acquisition unit 53, a correction mass-to-charge ratio determination unit 54, a sensitivity coefficient calculation unit 55, a chromatogram correction unit. 56 and a peak height / area measurement unit 57 are shown. These are basically functional means realized by software by the CPU 31 executing the quantitative program 43.
- the quantitative program 43 is not necessarily a single program, and may be a function incorporated in a part of a program for controlling the LC-MS 10, for example, and its form is not particularly limited.
- each component in the sample is temporally separated by the LC 11, and the MS 12 performs a scan measurement over a predetermined mass-to-charge ratio range with respect to the eluent from the LC 11. It is executed repeatedly at regular intervals.
- Detection signals from the MS 12 are sequentially sent to the data processing device 30 via the system controller 20 and stored in the data storage unit 44.
- the data storage unit 44 stores three-dimensional data including three axes of time, mass-to-charge ratio, and signal intensity as the analysis result of the sample.
- the qualitative program 42 detects a peak appearing on the three-dimensional data, refers to an identification table stored in advance in the storage unit 40, and corresponds to the peak from the peak position (retention time and mass-to-charge ratio). Is identified.
- the concentration program 43 calculates the concentration and amount of the component in the sample identified by the qualitative program 42 based on the three-dimensional data.
- the processing by the quantitative program 43 at this time will be described with reference to the flowchart of FIG.
- the chromatogram creation unit 51 of the quantification program 43 extracts measurement data relating to the target mass-to-charge ratio M1, which is predetermined as the mass-to-charge ratio used for quantifying the target component, from the three-dimensional data.
- a mass chromatogram relating to the charge ratio M1 is created (step S11).
- this mass chromatogram is referred to as a first mass chromatogram.
- the target mass-to-charge ratio M1 may be set by the user using the input unit 33, or the mass-to-charge ratio used for quantification of each compound is described in the identification table, and the target side on the apparatus side
- the value of the mass to charge ratio corresponding to the component compound may be read from the identification table and automatically set as the target mass to charge ratio M1.
- step S12 whether the value of the peak top of the peak (target peak) peak intensity determination unit 52 corresponding to the target component on the first mass chromatogram is not less than the threshold value I T determined (step S12) .
- the threshold value IT is set as high as possible within a range in which the detection signal is not affected by nonlinearity (a range in which the detection signal is not distorted or saturated), and is stored in the storage unit 40 in advance. If the value of the target peak is less than the threshold value I T, the detection signal is not influenced by the non-linearity, the peak on the first mass chromatogram even without correction of the chromatogram to be described later high A correct quantitative value can be obtained from the sheath area. Therefore, in this case, the process proceeds to step S18, and the peak height / area measuring unit 57 measures the height or area of the target peak on the first mass chromatogram (step S18).
- the quantification program 43 in this embodiment performs the correction process in steps S13 to S17 to create a chromatogram (corrected mass chromatogram) free from the influence of distortion and saturation in the target mass-to-charge ratio M1. .
- the spectrum acquisition unit 53 first extracts a mass spectrum from the three-dimensional data at the retention time t1 of the target component (that is, the time corresponding to the peak top of the target peak in the first mass chromatogram). Thereby, a mass spectrum as shown in FIG. 5 is obtained. Subsequently, the correction for mass charge ratio determining unit 54 searches the major peak of the highest signal strength is less than the threshold value I T on the mass spectrum, to determine the mass-to-charge ratio of the peak as the correction mass to charge ratio M2 (step S13).
- the spectrum acquisition unit 53 extracts a mass spectrum of the first signal strength purposes peaks on the mass spectrum does not exceed the threshold value I T time (for example, time corresponding to the foot portions of the peaks) t2 from the three-dimensional data (Step S14).
- this mass spectrum is referred to as a correction mass spectrum.
- An example of the correction mass spectrum is shown in FIG.
- the sensitivity coefficient calculating section 55 the signal strength I 1 object mass to charge ratio M1 of the correction mass on spectrum, divided by the signal intensity I 2 of the correction mass to charge ratio M2 on the same mass spectrum
- the sensitivity coefficient K is calculated (step S15).
- the chromatogram creation unit 51 creates a mass chromatogram related to the correction mass-to-charge ratio M2 based on the three-dimensional data (step S16).
- this mass chromatogram is referred to as a second mass chromatogram.
- An example of the second mass chromatogram is shown in FIG. Since the second mass chromatogram is created for the mass-to-charge ratio derived from the same component as the first mass chromatogram (ie, the target component), it has a peak near the retention time t1 of the target component, The peak shape is similar to the peak shape when there is no signal distortion or saturation at the target mass-to-charge ratio M1.
- the chromatogram correcting unit 56 creates a corrected mass chromatogram by multiplying the second mass chromatogram by the sensitivity coefficient K described above (step S17).
- An example of the corrected mass chromatogram is shown in FIG. Since the sensitivity coefficient K corresponds to the signal intensity ratio (I 1 / I 2 ) in the target mass-to-charge ratio M1 and the correction mass-to-charge ratio M2, the second mass chromatogram (the mass chromatogram relating to the correction mass-to-charge ratio M2).
- the corrected mass chromatogram obtained by multiplying the sensitivity coefficient K by 1) is an original mass chromatogram (that is, no influence of distortion or saturation) at the target mass-to-charge ratio M1.
- the peak height / area measuring unit 57 measures the height or area of the peak appearing in the vicinity of the target component retention time t1 on the corrected mass chromatogram (step S18).
- the corrected mass chromatogram is a mass chromatogram that is not affected by signal distortion or saturation. Therefore, the peak height and area obtained from the mass chromatogram correctly reflect the concentration of the target component in the sample. Will be.
- the above steps S11 to S18 are repeated for the number of target components.
- the analysis by LC-MS is performed after diluting the sample with different concentrations as in the past. Since it is not necessary to perform the measurement, the time and labor required for measurement can be reduced.
- FIG. 9 is a schematic configuration diagram of a sample analysis system including the data processor 30a for chromatograph mass spectrometer according to the present embodiment.
- the sample analysis system according to the present embodiment replaces the above-described chromatogram correction unit 56 and peak height / area measurement unit 57 as a functional block of the quantification program 43a, and corresponding peak height / area measurement unit 58 and peak height.
- the configuration is the same as that of the first embodiment except that it has an area correction unit 59 (hereinafter, the same components as those in the system according to the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate).
- a first mass chromatogram is created (step S21), whether or not the target peak intensity is equal to or greater than a threshold value (step S22), and the correction mass-to-charge ratio.
- Determination step S23
- acquisition of a correction mass spectrum step S24
- calculation of a sensitivity coefficient step S25
- creation of a second mass chromatogram step S26
- the corresponding peak height / area measurement unit 58 measures the height or area of the peak (corresponding peak) existing in the vicinity of the retention time t1 of the target component on the second mass chromatogram created in step S26 ( Step S27).
- the peak height / area correction unit 59 calculates the corrected peak height / area by multiplying the measured value obtained in step S27 by the sensitivity coefficient K calculated in step S25 (step S28). Since the sensitivity coefficient K is the ratio (I 1 / I 2 ) of the signal intensity in the target mass-to-charge ratio M1 and the correction mass-to-charge ratio M2, this is the mass chromatogram (first order) of the correction mass-to-charge ratio M2 as described above. By multiplying the measured values of the peak height and area obtained for the second chromatogram, the peak height and area at the target mass-to-charge ratio M1 (that is, not affected by distortion or saturation) can be obtained. it can.
- Example 1 and Example 2 described above the processing in steps S11 to S18 and steps S21 to S28 has been described as being performed after the sample measurement by the LC-MS 10 is completed. Part or all of the processing in the step may be executed in parallel with the sample measurement by the LC-MS 10.
- the mass-to-charge ratio of the peak indicating the maximum signal strength below the threshold I T on the mass spectrum at the retention time t1 the target component between the correction mass to charge ratio
- the method for determining the correction mass-to-charge ratio is not limited to this.
- the signal strength on the mass spectrum displays a peak below the threshold I T to the display unit 34, or to the user to select from the input unit 33 to appropriate one from among them, and equal to or less than the threshold value I T noise
- a peak that satisfies a predetermined criterion may be automatically selected on the device side from among peaks that are larger than the lower limit value of the signal intensity that can be distinguished from the device.
Abstract
Description
目的成分の定量に用いる目的質量電荷比を含む質量電荷比範囲について取得されたマススペクトルの時間変化に基づいてクロマトグラムを作成するクロマトグラフ質量分析装置用データ処理装置であって、
a)前記目的質量電荷比における信号強度の時間変化を示す第一マスクロマトグラムを作成する第一マスクロマトグラム作成手段と、
b)前記第一マスクロマトグラム上の前記目的成分に対応するピークである目的ピークのピークトップの信号強度が予め定められた閾値以上である場合に、前記ピークトップの出現時刻に対応したマススペクトル上で、前記閾値未満の信号強度を示すピークの質量電荷比を補正用質量電荷比として決定する補正用質量電荷比決定手段と、
c)前記目的ピーク中で信号強度が前記閾値を超えない時刻におけるマススペクトルである補正用マススペクトルを取得する補正用マススペクトル取得手段と、
d)前記補正用マススペクトル上における前記目的質量電荷比の信号強度を該補正用マススペクトル上における前記補正用質量電荷比の信号強度で除した感度係数を算出する感度係数算出手段と、
e)前記補正用質量電荷比における信号強度の時間変化を示す第二マスクロマトグラムを作成する第二マスクロマトグラム作成手段と、
f)前記第二マスクロマトグラムに前記感度係数を乗算することにより補正マスクロマトグラムを作成する補正マスクロマトグラム作成手段と、
を有することを特徴としている。
目的成分の定量に用いる目的質量電荷比を含む質量電荷比範囲について取得されたマススペクトルの時間変化に基づいてクロマトグラムを作成するクロマトグラフ質量分析装置用データ処理装置であって、
a)前記目的質量電荷比における信号強度の時間変化を示す第一マスクロマトグラムを作成する第一マスクロマトグラム作成手段と、
b)前記第一マスクロマトグラム上の前記目的成分に対応するピークである目的ピークのピークトップの信号強度が予め定められた閾値以上である場合に、前記ピークトップの出現時刻に対応したマススペクトル上で、前記閾値未満の信号強度を示すピークの質量電荷比を補正用質量電荷比として決定する補正用質量電荷比決定手段と、
c)前記目的ピーク中で信号強度が前記閾値を超えない時刻におけるマススペクトルである補正用マススペクトルを取得する補正用マススペクトル取得手段と、
d)前記補正用マススペクトル上における前記目的質量電荷比の信号強度を該補正用マススペクトル上における前記補正用質量電荷比の信号強度で除した感度係数を算出する感度係数算出手段と、
e)前記補正用質量電荷比における信号強度の時間変化を示す第二マスクロマトグラムを作成する第二マスクロマトグラム作成手段と、
f)前記目的ピークと同一の時刻に出現する前記第二マスクロマトグラム上のピークである対応ピークの高さ又は面積を算出する対応ピーク高さ・面積算出手段と、
g)前記対応ピークの高さ又は面積に前記補正係数を乗算することにより補正ピーク高さ又は補正ピーク面積を算出する補正ピーク高さ・面積算出手段と、
を有することを特徴としている。
11…液体クロマトグラフ(LC)
12…質量分析装置(MS)
20…システムコントローラ
30、30a…データ処理装置
31…CPU
32…メモリ
33…入力部
34…表示部
35…インターフェース
40…記憶部
41…OS
42…定性用プログラム
43、43a…定量用プログラム
44…データ記憶部
51…クロマトグラム作成部
52…ピーク強度判定部
53…スペクトル取得部
54…補正用質量電荷比決定部
55…感度係数算出部
56…クロマトグラム補正部
57…ピーク高さ・面積計測部
58…対応ピーク高さ・面積計測部
59…ピーク高さ・面積補正部
Claims (4)
- 目的成分の定量に用いる目的質量電荷比を含む質量電荷比範囲について取得されたマススペクトルの時間変化に基づいてクロマトグラムを作成するクロマトグラフ質量分析装置用データ処理装置であって、
a)前記目的質量電荷比における信号強度の時間変化を示す第一マスクロマトグラムを作成する第一マスクロマトグラム作成手段と、
b)前記第一マスクロマトグラム上の前記目的成分に対応するピークである目的ピークのピークトップの信号強度が予め定められた閾値以上である場合に、前記ピークトップの出現時刻に対応したマススペクトル上で、前記閾値未満の信号強度を示すピークの質量電荷比を補正用質量電荷比として決定する補正用質量電荷比決定手段と、
c)前記目的ピーク中で信号強度が前記閾値を超えない時刻におけるマススペクトルである補正用マススペクトルを取得する補正用マススペクトル取得手段と、
d)前記補正用マススペクトル上における前記目的質量電荷比の信号強度を該補正用マススペクトル上における前記補正用質量電荷比の信号強度で除した感度係数を算出する感度係数算出手段と、
e)前記補正用質量電荷比における信号強度の時間変化を示す第二マスクロマトグラムを作成する第二マスクロマトグラム作成手段と、
f)前記第二マスクロマトグラムに前記感度係数を乗算することにより補正マスクロマトグラムを作成する補正マスクロマトグラム作成手段と、
を有することを特徴とするクロマトグラフ質量分析装置用データ処理装置。 - 目的成分の定量に用いる目的質量電荷比を含む質量電荷比範囲について取得されたマススペクトルの時間変化に基づいてクロマトグラムを作成するクロマトグラフ質量分析装置用データ処理装置であって、
a)前記目的質量電荷比における信号強度の時間変化を示す第一マスクロマトグラムを作成する第一マスクロマトグラム作成手段と、
b)前記第一マスクロマトグラム上の前記目的成分に対応するピークである目的ピークのピークトップの信号強度が予め定められた閾値以上である場合に、前記ピークトップの出現時刻に対応したマススペクトル上で、前記閾値未満の信号強度を示すピークの質量電荷比を補正用質量電荷比として決定する補正用質量電荷比決定手段と、
c)前記目的ピーク中で信号強度が前記閾値を超えない時刻におけるマススペクトルである補正用マススペクトルを取得する補正用マススペクトル取得手段と、
d)前記補正用マススペクトル上における前記目的質量電荷比の信号強度を該補正用マススペクトル上における前記補正用質量電荷比の信号強度で除した感度係数を算出する感度係数算出手段と、
e)前記補正用質量電荷比における信号強度の時間変化を示す第二マスクロマトグラムを作成する第二マスクロマトグラム作成手段と、
f)前記目的ピークと同一の時刻に出現する前記第二マスクロマトグラム上のピークである対応ピークの高さ又は面積を算出する対応ピーク高さ・面積算出手段と、
g)前記対応ピークの高さ又は面積に前記補正係数を乗算することにより補正ピーク高さ又は補正ピーク面積を算出する補正ピーク高さ・面積算出手段と、
を有することを特徴とするクロマトグラフ質量分析装置用データ処理装置。 - 前記補正用質量電荷比決定手段が、信号強度が前記閾値未満であるピークの中で最大の信号強度を示すピークの質量電荷比を前記補正用質量電荷比として決定することを特徴とする請求項1又は2に記載のクロマトグラフ質量分析装置用データ処理装置。
- コンピュータを請求項1~3のいずれかに記載の各手段として機能させるためのプログラム。
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