WO2015059753A1 - 包括的2次元クロマトグラフ用データ処理装置 - Google Patents
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- 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
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
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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
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/38—Flow patterns
- G01N30/46—Flow patterns using more than one column
- G01N30/461—Flow patterns using more than one column with serial coupling of separation columns
- G01N30/463—Flow patterns using more than one column with serial coupling of separation columns for multidimensional chromatography
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- 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
- G01N30/8679—Target compound analysis, i.e. whereby a limited number of peaks is analysed
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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
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- G01N30/8624—Detection of slopes or peaks; baseline correction
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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
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8804—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 automated systems
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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
- G01N30/62—Detectors specially adapted therefor
- G01N30/72—Mass spectrometers
- G01N30/7233—Mass spectrometers interfaced to liquid or supercritical fluid chromatograph
Definitions
- the present invention relates to a comprehensive two-dimensional chromatographic data processing apparatus for processing data collected by a comprehensive two-dimensional gas chromatograph (GC), a comprehensive two-dimensional liquid chromatograph (LC), and the like.
- a comprehensive two-dimensional chromatographic data processing apparatus for processing data collected by a comprehensive two-dimensional gas chromatograph (GC), a comprehensive two-dimensional liquid chromatograph (LC), and the like.
- the present invention relates to a data processing apparatus for processing and displaying data obtained by a comprehensive two-dimensional chromatograph using a detector.
- a technique called comprehensive two-dimensional GC or GC ⁇ GC is known (see Patent Document 1).
- comprehensive two-dimensional GC various components contained in a target sample are first separated by a first-dimensional column (hereinafter referred to as “primary column”), and the eluted components are introduced into a modulator.
- the modulator collects the introduced components at regular time intervals (usually about several seconds to several tens of seconds, hereinafter referred to as “modulation time”), and then removes them with a very narrow time bandwidth.
- modulation time usually about several seconds to several tens of seconds
- the component separation is performed under the same separation conditions as those for normal GC or slightly slower elution than normal GC.
- a column having a polarity different from that of the primary column and having a small inner diameter is used for the secondary column, and the component separation is performed under such a condition that the elution is completed within a predetermined modulation time.
- the comprehensive two-dimensional GC in the comprehensive two-dimensional GC, a plurality of components with overlapping peaks can be separated in the secondary column without being separated in the primary column, and the separation performance is greatly improved as compared with the normal GC. To do. For this reason, the comprehensive two-dimensional GC is very effective for analysis of a sample containing many compounds having similar retention times, for example, hydrocarbon analysis of diesel fuel.
- a method called comprehensive two-dimensional LC or LC ⁇ LC using two-stage columns with different separation specifications is known, as in the above-described comprehensive two-dimensional GC.
- the comprehensive two-dimensional GC and the comprehensive two-dimensional LC are collectively referred to as a comprehensive two-dimensional chromatograph.
- the components in the sample gas or sample solution that have passed through the two-stage column are detected, and therefore the data output from the detector is one-line time-series data. Therefore, by plotting the data thus obtained in the order of occurrence, the same chromatogram as in normal GC, that is, the retention time is plotted on the horizontal axis and the signal intensity is plotted on the vertical axis, as shown in FIG. A one-dimensional chromatogram can be created.
- tm is a modulation time
- the chromatogram within the time tm is a chromatogram reflecting the component separation state in the secondary column.
- FIG. 4B is an explanatory diagram of a data arrangement order when creating a two-dimensional chromatogram from the one-dimensional chromatogram data.
- the range of the vertical axis of this graph is the modulation time tm, and the one-dimensional chromatogram data is sequentially plotted upward from the lower end (0) along the vertical axis (solid arrow in FIG. 4B).
- Tm the operation moves to the right along the horizontal axis, returns to the lower end of the vertical axis (dotted line in FIG. 4B), and plots upward again along the vertical axis.
- a two-dimensional chromatogram as shown in FIG. 4C can be created.
- the signal intensity is indicated by contour lines.
- FIG. 5 is an example of a two-dimensional chromatogram based on actually measured data in a comprehensive two-dimensional GC.
- the signal intensity is expressed in a color scale (however, since the color cannot be drawn here, it is expressed in gray scale).
- the horizontal axis in the two-dimensional chromatogram represents the boiling point order
- the vertical axis represents the polarity order. Therefore, the analyst can easily understand the nature of each component based on the two-dimensional chromatogram, and even if the sample contains many components, what kind of components are included? It can be grasped intuitively.
- GC Image As a data processing software for creating such a two-dimensional chromatogram, “GC Image” (see Non-Patent Document 1) provided by US GC Image LLC is well known. Yes.
- Non-Patent Document 2 in order to identify and quantify various components in a sample containing a relatively large amount of contaminants, a comprehensive two-dimensional chromatograph having high separation performance as described above.
- a mass spectrometer particularly a combination of a mass spectrometer capable of MS / MS analysis such as a triple quadrupole mass spectrometer and an ion trap time-of-flight mass spectrometer is useful.
- a triple quadrupole mass spectrometer an ion having a specific mass-to-charge ratio derived from a compound is selected as a precursor ion, and various product ions generated by cleaving the precursor ion by collision-induced dissociation are comprehensively included.
- FIG. 6 is an example of an MS / MS spectrum obtained by product ion scan measurement.
- the peak of the precursor ion that is not actually detected is indicated by a dotted line.
- precursor ion scan measurement for comprehensively examining precursor ions that generate specific product ions, and precursor ions and products that generate specific neutral fragments (neutral loss) by cleavage.
- MS / MS analysis techniques such as neutral loss scan measurement for examining combinations of ions can also be implemented.
- the triple quadrupole type Using a comprehensive two-dimensional chromatograph with a mass spectrometer as a detector, a number of compounds are sufficiently separated by time and mass-to-charge ratio, and product ion scan measurement and neutral loss scan measurement are performed. It is better to analyze the data collected by the above and grasp the difference in partial chemical structure.
- MS / MS analysis in triple quadrupole mass spectrometers and ion trap time-of-flight mass spectrometers has become faster and the techniques have become more complex.
- the mass-to-charge ratio and signal intensity of the peak appearing in the measured mass spectrum are automatically determined.
- Some devices are equipped with a function to automatically select a precursor ion suitable for the conditions and perform a product ion scan measurement.
- IDA Intelligent Data Acquisition or Information-Dependent Acquisition
- Auto MS / MS and the like.
- the present invention has been made in view of these problems, and its main purpose is the presence or absence of a compound that the analyst is focusing on or a compound that contains a chemical structure that is focused on, and when there are a plurality of such compounds.
- its main purpose is the presence or absence of a compound that the analyst is focusing on or a compound that contains a chemical structure that is focused on, and when there are a plurality of such compounds.
- by providing a comprehensive two-dimensional chromatographic data processing device that enables an analyst to intuitively understand information useful for compound identification and structural analysis, such as the approximate relationship of retention times of these compounds. is there.
- the present invention provides a sample separated into components in the primary column and introduced into the secondary column at predetermined intervals, and further separated into components in the secondary column and then introduced into the detector.
- a comprehensive two-dimensional chromatographic data processing device for processing data collected by a comprehensive two-dimensional chromatograph that detects each component, a) a chromatogram creation unit for creating a two-dimensional chromatogram based on the retention time in the primary column and the retention time in the secondary column based on the data collected by the comprehensive two-dimensional chromatograph; b) a condition input setting unit in which an analyst inputs and sets extraction conditions for selecting characteristic data among data collected by a comprehensive two-dimensional chromatograph; c) It is determined whether or not the data collected by the comprehensive two-dimensional chromatograph meets the extraction condition input and set by the condition input setting unit.
- a superimposed display processing unit that superimposes and displays a predetermined marker at a position corresponding to the retention time at which the data was acquired on the dimensional chromatogram; It is
- the “comprehensive two-dimensional chromatograph” may be either a comprehensive two-dimensional gas chromatograph or a comprehensive two-dimensional liquid chromatograph.
- the analyst can select, for example, a compound of interest by using the condition input setting unit in advance (that is, before the analysis by the comprehensive two-dimensional chromatograph) or before the data analysis processing after data collection.
- Characteristic data for example, a characteristic signal intensity pattern
- the condition input setting unit can input and set extraction conditions for selecting a plurality of different types of characteristic data.
- the superimposed display processing unit determines whether or not the above-described extraction condition is satisfied with respect to data sequentially obtained with the passage of time by a comprehensive two-dimensional chromatograph.
- the holding time at which the data is acquired is checked, and a predetermined marker is superimposed and displayed at a position corresponding to the holding time on the two-dimensional chromatogram. Therefore, the analyst can visually confirm on the two-dimensional chromatogram the retention time at which the compound satisfying the extraction condition set by himself / herself appears.
- the same marker is superimposed and displayed at a plurality of positions on the two-dimensional chromatogram. Can be understood at a glance.
- the superimposed display processing unit individually determines whether the collected data meets the extraction conditions for each extraction condition, and When there is data to be performed, markers having different shapes (or colors, etc.) may be superimposed on the two-dimensional chromatogram according to the extraction conditions.
- the detector changes the third dimension which is any one of mass-to-charge ratio, wavelength, or time other than holding time.
- the extraction condition can include a value related to the third dimension.
- the third dimension is the mass-to-charge ratio when using a mass spectrometer as the detector, and the third dimension when using an ultraviolet-visible spectroscopic detector, a photodiode detector, a fluorescence spectroscopic detector, or the like as the detector.
- the dimension is a wavelength, and when using an ion mobility meter or the like as a detector, the third dimension is time.
- the third dimension is an element that can separate different components. Therefore, even when the plurality of components in the sample cannot be sufficiently separated by the two-stage column, the plurality of overlapping components can be separated by the third dimension when detected by the detector.
- the detector is a mass spectrometer capable of MS n (n is an integer of 2 or more) analysis, and the extraction condition is determined by MS n analysis performed in the mass spectrometer. It can be set as the structure which is the conditions for determining the information extracted from the spectrum data obtained.
- the mass spectrometer is a triple quadrupole mass spectrometer or an ion trap time-of-flight mass spectrometer, and MS 2 analysis (normal mass analysis without ion cleavage) MS 2 according to predetermined measurement conditions. or repeated analysis can be automatically assumed that repeated or automated MS 2 analysis of running the MS 2 analysis when certain conditions are met in accordance with the MS 1 analysis results (mass spectrum).
- MS 2 analysis normal mass analysis without ion cleavage
- MS 2 analysis normal mass analysis without ion cleavage
- the extraction conditions are such that a peak at a specific mass-to-charge ratio on the spectrum is observed, and a specific neutral loss corresponding to the mass-to-charge difference with the precursor ion is observed.
- the elution position of the compound having the partial chemical structure can be displayed on the two-dimensional chromatogram.
- the elution position of a compound from which data satisfying the conditions set by the analyst is obtained is displayed superimposed on the two-dimensional chromatogram.
- a person can confirm at a glance whether or not a compound of interest or a compound containing a chemical structure of interest exists in the sample.
- the elution position of these compounds that is, the approximate relationship between retention times, is correlated with the distribution of the two-dimensional peak on the two-dimensional chromatogram and intuitively grasped. can do.
- the schematic block diagram of one Example of the comprehensive two-dimensional GC system provided with the data processing apparatus for comprehensive two-dimensional chromatographs concerning this invention Explanatory drawing of the display process in the comprehensive two-dimensional GC system of a present Example.
- Example of one-dimensional chromatogram based on data collected by comprehensive two-dimensional GC (a) Explanatory diagram (b) of data arrangement when creating a two-dimensional chromatogram based on one-dimensional chromatogram data, and two-dimensional
- FIG. 1 is a schematic configuration diagram of a comprehensive two-dimensional GC system according to the present embodiment
- FIG. 2 is an explanatory diagram of display processing in the comprehensive two-dimensional GC system of the present embodiment
- FIG. 3 is a comprehensive two-dimensional GC of the present embodiment. It is a figure which shows an example of the two-dimensional chromatogram displayed in a system.
- the GC unit 1 is eluted from the sample introduction unit 11 and the primary column 12 including a primary column 12 and a sample vaporization chamber for introducing a sample gas into the primary column 12.
- a high-speed modulator having a separation characteristic (typically different polarity) different from that of the primary column 12 and a modulator 13 that collects components (compounds) to be collected at regular time intervals (modulation time tm) and compresses them in time.
- the sample gas containing the components separated in the secondary column 14 is introduced into the mass spectrometer 2 capable of MS n analysis, and detection signals corresponding to the compounds are sequentially output from the mass spectrometer 2 to the data processing unit 3.
- the mass spectrometer 2 is a triple quadrupole mass spectrometer in which a quadrupole mass filter is arranged before and after the collision cell, and the specific selected by the previous quadrupole mass filter. Ions having a mass-to-charge ratio (precursor ion) are cleaved by collision-induced dissociation in the collision cell, and ions having a specific mass-to-charge ratio among the various product ions generated thereby are separated by a quadrupole mass filter in the subsequent stage. Can be selected and detected.
- the data processing unit 3 collects and stores data sequentially output from the mass spectrometer 2 as time passes, and based on the data stored in the data storage unit 31, a two-dimensional chromatogram.
- a two-dimensional chromatogram creation unit 32 that creates a gram
- a mass spectrum creation unit 33 that creates a mass spectrum (including MS / MS spectra) based on the data stored in the data storage unit 31, and an input set by an analyst
- An extraction condition storage unit 34 for storing the extracted compound extraction conditions, and a peak or a mass difference between the peaks that matches the compound extraction conditions stored in the extraction condition storage unit 34 with respect to the mass spectrum.
- Extraction condition suitability determination unit 35 for extracting a spectrum, and time when the mass spectrum extracted by the extraction condition suitability determination unit 35 is acquired It includes a condition-satisfying information superimposed display unit 36 for displaying the corresponding position superimposed on the two-dimensional chromatogram as a marker, as functional blocks.
- each unit included in the GC unit 1 and the mass spectrometer 2 is controlled by the analysis control unit 4.
- the main control unit 5 connected to the operation unit 6 and the display unit 7 as a user interface controls the entire system in addition to input / output control.
- the main control unit 5, the analysis control unit 4 and the data processing unit 3 use a personal computer as a hardware resource and execute dedicated control / processing software installed in the personal computer in advance on the computer. Each function can be realized.
- the sample introduction unit 11 introduces a sample to be analyzed into a carrier gas sent to the primary column 12 at a substantially constant flow rate in response to an instruction from the analysis control unit 4.
- this sample contains a large number of compounds.
- Various compounds contained in the sample are separated while passing through the primary column 12 that has been temperature-controlled according to a predetermined temperature raising program, and are eluted with a time lag. At this point in time, not all compounds are sufficiently separated, and compounds with a retention time in the primary column 12 that are close to each other are eluted together (in a mixed state).
- the modulator 13 repeats the operation of collecting all the compounds eluted from the primary column 12 over the modulation time tm, compressing them in time, and sending them to the secondary column 14 with a very narrow bandwidth. Therefore, the compound eluted from the primary column 12 is sent to the secondary column 14 without leakage.
- the plurality of compounds fed at every modulation time tm are separated and eluted in the time direction with high resolution when passing through the secondary column 14, and are introduced into the mass spectrometer 2 in the order of elution.
- Mass spectrum data over a predetermined mass-to-charge ratio range is obtained from time to time (see FIG. 2).
- the data storage unit 31 collects and stores the mass spectrum data sequentially obtained with the passage of time.
- a one-dimensional total ion chromatogram as shown in FIG. 4A is created by arranging the ion intensity signals obtained by adding the obtained ion intensities in time series for each scan measurement. be able to.
- the analyst uses the operation unit 6 in advance to operate the target precursor ion.
- the measurement conditions such as the mass-to-charge ratio and the measurement time range are set, and the start of analysis is instructed.
- the analysis control unit 4 controls the mass spectrometer 2 to perform MS / MS analysis in accordance with the set measurement conditions, and as a result, the set ions are set as precursor ions in the set measurement time range.
- the product ion scan measurement is repeated, and MS / MS spectrum data corresponding to each measurement is obtained.
- precursor ion selection conditions such as a signal intensity threshold are set in advance by the operation unit 6. Then, the mass spectrometer 2 converts the ions into precursor ions following the scan measurement only when ions that match the precursor ion selection conditions set based on the mass spectrum obtained by the normal scan measurement are detected. The set product ion scan measurement is repeated a predetermined number of times.
- MS / MS analysis such as product ion scan measurement, precursor ion scan measurement, and neutral scan measurement is performed, in addition to mass spectrum data, MS / MS over a predetermined mass-to-charge ratio range. Spectral data is obtained (see FIG. 2).
- the data storage unit 31 also stores the MS / MS spectrum data obtained with the passage of time together with the mass spectrum data.
- Compound extraction conditions are set for the compound of interest that is to be displayed superimposed on the two-dimensional chromatogram.
- the compound extraction conditions include, for example, the mass-to-charge ratio value of one or more peaks observed on the MS / MS spectrum, the lower limit value of the signal intensity of the peak, and the precursor ion in the MS / MS spectrum.
- Various values related to the mass spectrum and the MS / MS spectrum such as a neutral loss value corresponding to the mass difference, can be used.
- not only one compound extraction condition but a plurality of compound extraction conditions can be set.
- the set compound extraction conditions are stored in the extraction condition storage unit 34.
- the two-dimensional chromatogram creation unit 32 reads all the mass spectrum data from the data storage unit 31 and performs measurement. The added value of the ion intensity is calculated for each time point, that is, for each mass spectrum. As shown in FIG. 4B, the retention time in the primary column 12 is plotted on the horizontal axis, and the retention time in the secondary column 14 is plotted on the vertical axis. Then, a two-dimensional total ion chromatogram representing the added value (signal intensity) of the ion intensity on a color scale is created. This is a process that has been performed conventionally, and can be realized by using existing software such as “GC ⁇ Image ”described above. As a result, a two-dimensional chromatogram as shown in FIG. 3 or FIG. 4C is created.
- the mass spectrum creation unit 33 reads the mass spectrum data and / or MS / MS spectrum data from the data storage unit 31 and creates the mass spectrum and / or the MS / MS spectrum. .
- the extraction condition suitability determination unit 35 reads the compound extraction conditions stored in the extraction condition storage 34, and as shown in FIG. 2, whether there is a peak or the like that matches the compound extraction conditions in each mass spectrum or MS / MS spectrum. Determine whether or not. Then, a mass spectrum and / or MS / MS spectrum in which a peak suitable for the compound extraction condition is observed is derived from the compound that the analyst pays attention to, that is, a spectrum in which the structural information of the compound is reflected. To be extracted. When multiple types of compound extraction conditions are set, a mass spectrum or MS / MS spectrum suitable for each compound extraction condition is extracted.
- the condition conformity information superimposing display unit 36 displays the retention times (the retention time in the primary column 12 and the retention time in the secondary column 14) corresponding to the mass spectrum and the MS / MS spectrum extracted by the extraction condition conformity determination unit 35, respectively. Identify. Then, on the two-dimensional chromatogram created by the two-dimensional chromatogram creation unit 32, a marker having a different mode (shape, color, etc.) for each compound extraction condition is superimposed on the specified retention time position. Then, the two-dimensional chromatogram on which the marker is superimposed is displayed on the screen of the display unit 7 through the main control unit 5.
- FIG. 3 a two-dimensional chromatogram as shown in FIG. 3 is displayed on the screen of the display unit 7.
- markers corresponding to two types of compound extraction conditions a marker indicated by “ ⁇ ” and a marker indicated by “ ⁇ ”, are superimposed on the two-dimensional chromatogram.
- the analyst can easily grasp the retention time at which a compound that meets the compound extraction conditions specified by the analyst appears.
- the signal intensity is displayed in a color scale (in this case, the color cannot be expressed, so the gray scale is displayed in gray), but a marker is superimposed on a two-dimensional chromatogram representing the signal intensity with contour lines. You may make it display.
- the total ion chromatogram based on the normal mass analysis result is a two-dimensional chromatogram.
- a two-dimensional chromatogram may be created based on the data. For example, each mass spectrum is subjected to mass defect filter processing that selects only ions derived from a certain substance and ions with a fractional decimal point of the mass-to-charge ratio.
- a two-dimensional chromatogram may be created using the spectrum. This is effective, for example, when detecting an unexpected metabolite from a certain substance and detecting ions derived from the metabolite with high sensitivity by eliminating the influence of impurities.
- isotopic filter processing that selects ions based on the intensity ratio of monoisotopic ion peak and isotope ion peak for each mass spectrum obtained by repeating normal mass spectrometry
- a two-dimensional chromatogram may be created using the mass spectrum after narrowing down the ions. This is effective when detecting ions derived from a specific substance labeled with a labeling reagent such as deuterium or carbon isotopes ( 13 C, 14 C) with high sensitivity.
- a total ion chromatogram based on the MS / MS analysis result (for example, an addition value of the ion intensity of the product ion spectrum in a predetermined mass-to-charge ratio range).
- (Based chromatogram) may be a two-dimensional chromatogram. At this time, instead of creating a two-dimensional chromatogram from a simple MS / MS spectrum (that is, a spectrum reflecting the obtained data without omission), it corresponds to a peak having a specific mass-to-charge ratio or a specific neutral loss.
- a two-dimensional chromatogram may be created from a spectrum or the like. That is, if it is created based on mass spectral data or MS / MS spectral data obtained by comprehensive two-dimensional GC / MS analysis performed on the sample, the signal intensity value of the two-dimensional chromatogram is The information to be displayed is not particularly limited.
- a triple quadrupole mass spectrometer is used as a comprehensive two-dimensional chromatograph detector.
- a comprehensive two-dimensional chromatograph using a detector other than a mass spectrometer is used.
- the present invention can also be applied.
- a photodiode detector or the like may be used as a detector, and such a detector can repeatedly obtain signal intensity (such as absorbance) over a predetermined wavelength range. Therefore, for example, by setting a compound extraction condition to have a peak at a specific wavelength and extracting a wavelength spectrum that matches the compound extraction condition, analysis is performed on the two-dimensional chromatogram as described above. A marker can be displayed in a superimposed manner at the position (holding time) of the compound focused on by the person.
- the ion mobility meter is arranged between the GC unit and the mass spectrometer
- data indicating the relationship between the travel time and the signal intensity can be collected in the ion mobility meter. Therefore, in the spectrum indicating the relationship between the movement time and the signal intensity, for example, setting a compound extraction condition to have a peak at a specific movement time, and extracting a spectrum that matches the compound extraction condition,
- a marker can be superimposed on the position (retention time) of the compound focused on by the analyst on the two-dimensional chromatogram.
- both the marker based on the result of the ion mobility meter and the marker based on the result of the mass spectrometer may be superimposed and displayed on one two-dimensional chromatogram.
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Abstract
Description
包括的2次元GCでは、目的試料に含まれる各種成分を1次元目のカラム(以下「1次カラム」という)でまず分離し、その溶出成分をモジュレータに導入する。モジュレータは、導入された成分を一定時間間隔(通常、数秒~十数秒程度、以下、この時間間隔を「モジュレーション時間」という))毎に捕集した後にごく狭い時間バンド幅で離脱させ、2次元目のカラム(以下「2次カラム」という)に導入する、という操作を繰り返す。一般に、1次カラムでは、通常のGCと同様の又は通常のGCよりもやや緩慢な溶出が行えるような分離条件で以て成分分離が行われる。これに対し、2次カラムには1次カラムとは異なる極性で且つ短く内径が小さいカラムが使用され、決められたモジュレーション時間内に溶出が終了するような条件で以て成分分離が行われる。
図6はプロダクトイオンスキャン測定によって得られるMS/MSスペクトルの一例である。図6では、実際には検出されないプリカーサイオンのピークを点線で示している。
a)包括的2次元クロマトグラフにより収集されたデータに基づいて、1次カラムにおける保持時間と2次カラムにおける保持時間とをそれぞれ軸とした2次元クロマトグラムを作成するクロマトグラム作成部と、
b)包括的2次元クロマトグラフにより収集されたデータの中で特徴的なデータを選択するための抽出条件を分析者が入力設定する条件入力設定部と、
c)包括的2次元クロマトグラフにより収集された前記データに対して前記条件入力設定部により入力設定された抽出条件に適合するか否かを判定し、適合するデータが存在した場合に、前記2次元クロマトグラム上で、そのデータが取得された保持時間に対応する位置に所定のマーカーを重畳表示する重畳表示処理部と、
を備えることを特徴としている。
GC部1において、試料導入部11は分析制御部4からの指示に応じて、1次カラム12に略一定流量で送られるキャリアガス中に分析対象である試料を導入する。通常、この試料には多数の化合物が含まれる。該試料に含まれる各種化合物は、所定の昇温プログラムに従って温調された1次カラム12を通過する間に分離されて時間的にずれて溶出する。この時点では全ての化合物が十分に分離されているとは限らず、1次カラム12での保持時間が近い化合物は重なって(混じった状態で)溶出する。
11…試料導入部
12…1次カラム
13…モジュレータ
14…2次カラム
2…質量分析計
3…データ処理部
4…分析制御部
5…主制御部
6…操作部
7…表示部
31…データ記憶部
32…2次元クロマトグラム作成部
33…マススペクトル作成部
34…抽出条件記憶部
35…抽出条件適合判定部
36…条件適合情報重畳表示部
Claims (4)
- 1次カラムで成分分離した試料を所定時間毎に区切って2次カラムに導入し、該2次カラムでさらに成分分離したあとに検出器に導入して各成分を検出する包括的2次元クロマトグラフにより収集されたデータを処理する包括的2次元クロマトグラフ用データ処理装置であって、
a)包括的2次元クロマトグラフにより収集されたデータに基づいて、1次カラムにおける保持時間と2次カラムにおける保持時間とをそれぞれ軸とした2次元クロマトグラムを作成するクロマトグラム作成部と、
b)包括的2次元クロマトグラフにより収集されたデータの中で特徴的なデータを選択するための抽出条件を分析者が入力設定する条件入力設定部と、
c)包括的2次元クロマトグラフにより収集された前記データに対して前記条件入力設定部により入力設定された抽出条件に適合するか否かを判定し、適合するデータが存在した場合に、前記2次元クロマトグラム上で、そのデータが取得された保持時間に対応する位置に所定のマーカーを重畳表示する重畳表示処理部と、
を備えることを特徴とする包括的2次元クロマトグラフ用データ処理装置。 - 請求項1に記載の包括的2次元クロマトグラフ用データ処理装置であって、
前記検出器は、質量電荷比、波長、又は、保持時間以外の時間のいずれかである第3のディメンジョンを変化させたときの信号強度を繰り返し取得する検出器であり、
前記抽出条件は、第3のディメンジョンに関連した値を含むことを特徴とする包括的2次元クロマトグラフ用データ処理装置。 - 請求項2に記載の包括的2次元クロマトグラフ用データ処理装置であって、
前記検出器はMSn(nは2以上の整数)分析が可能である質量分析装置であり、前記抽出条件は、該質量分析装置で実施されるMSn分析によって得られるスペクトルデータから抽出される情報を判定するための条件であることを特徴とする包括的2次元クロマトグラフ用データ処理装置。 - 請求項1~3のいずれかに記載の包括的2次元クロマトグラフ用データ処理装置であって、
前記条件入力設定部は、異なる種類の複数の特徴的なデータを選択するための抽出条件を入力設定可能であり、
該条件入力設定部で複数の抽出条件が設定された場合、前記重畳表示処理部はその抽出条件毎に個別に、収集されたデータが抽出条件に適合するか否かを判定し、適合するデータがそれぞれ存在した場合に、その抽出条件に応じて異なる態様のマーカーを2次元クロマトグラムに重畳表示することを特徴とする包括的2次元クロマトグラフ用データ処理装置。
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PCT/JP2013/078489 WO2015059753A1 (ja) | 2013-10-21 | 2013-10-21 | 包括的2次元クロマトグラフ用データ処理装置 |
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