JPS6120854A - Mass spectrum display system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a mass spectrometry data analysis system.
This relates to a mass spectrum display method that displays spectra in a pie chart according to a specified period.

[Conventional technology]

In a dual focus mass spectrometer, the sample is ionized, the beam is accelerated, and the collector is passed through an electric and magnetic field.
Although the data is captured by a slit, conventionally, the measured data captured here is CR by a bar graph or a line crank, with the mass number M/Z as the horizontal axis and the intensity INT as the vertical axis.
It was displayed on T.

[Problem that the invention seeks to solve]

When ionizing a sample in a mass spectrometer, for example, CH
, CH, etc., occur.

Due to this separation phenomenon, a cleavage peak appears in the mass spectrum by decomposing the molecular peak.

Therefore, the compositional formula of the molecular peak can be identified based on this cleavage peak. However, in the conventional mass spectrum display method as described above, there are problems in understanding and analyzing periodic changes. The present invention is based on such consideration, and an object of the present invention is to provide a mass spectrum display method that allows easy understanding of periodic changes in peaks in a mass spectrum and differences thereof.

It is something to do.

[Means for solving problems]

To this end, the mass spectrum display method of the present invention includes a pie chart setting table in which the pie chart display mass range and other parameters are registered, and measurement data in which measured data is converted into pie chart display data according to the variations of the pie chart setting table. The present invention is characterized in that it includes a conversion processing means, and displays measurement data in a pie chart by making the mass number and intensity correspond to the display angle of the pie chart and the length of the bar, respectively.

[Operation] When the display mass range, radial scale, display color, etc. are registered in the pie chart setting table, the measurement data conversion processing means refers to the pie chart setting table and converts the mass number of the measurement data into the display mass.・Convert to display angle according to range, and intensity to bar length according to radial scale. Then, the measured data is displayed in a pie chart according to the specified display color. Therefore, if the content is to be divided into multiple pie charts as specified by a parameter, the graphs may be displayed overlappingly or individually depending on whether they are displayed overlappingly or separately.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a diagram for explaining one embodiment of the present invention, Fig. 2 is a diagram for explaining measurement data, Fig. 3 is a diagram for explaining a pie chart setting table, and Fig. 4 is a diagram for explaining the peak FIG. 5 is a diagram for explaining the display contents by the mass spectrometry data analysis system to which the present invention is applied.

In FIG. 1, 1 is a mass spectrometer, 2 is an input section, 3 is a measurement data conversion processing section, 4 is a pie chart setting table, and 5 is a display section. In the mass spectrometer 1, for example, as shown in Figure 2, the mass number ml = m2+ m3+
+ m n and the intensity Pl+ Pz corresponding to the mass number
, P3+..., P7 are output as measurement data. When this measurement data is displayed with mass number on the horizontal axis and intensity on the vertical axis, it becomes a bar graph as shown in FIG. Pie chart setting table 4 has display squares and
The range is used to register basic parameters for displaying the ground graph, and is set and registered by the operator from the input unit 2, such as a keyboard. FIG. 3 shows an example of the settings of the pie chart setting table 4.

In FIG. 3, MSI, MS2. ...and M
EN, MEz, . . . indicate mass numbers, and one pie chart A indicates mass number MS.

to MEI using red display color, and the other pie chart B shows the mass number Ms2.
This is an instruction to display using the blue display color in the range ME2. The measurement data conversion processing section 3
The mass number and intensity are converted into the angle and bar length of the pie chart according to the registered contents of the pie chart setting table 4 as shown in FIG. 3, and the measurement data is displayed on the display section 5 in the form of a pie chart.

The pie chart, as shown in FIG. 5, is a graph in which the mass number is converted into an angle and the intensity is converted into the length of a bar in the radial direction. Therefore, for example, the mass number m1 of the measurement data shown in FIG.
When θ falls within the range from mass number MSI to MEI in the illustrated table in FIG. 3, the pie chart display angle θ of the molecular peak of mass number m is MEI −MS.

is required.

FIG. 6 shows an example in which mass spectra are displayed separately in a plurality of pie charts, and FIG. 7 shows an example in which a plurality of pie charts are displayed in a superimposed manner. In such a pie chart, if the period (ME -) Is) is set to 14 M/Z, it becomes easier to understand the withdrawal of CH2, etc., and if the period is set to 15 M/Z, it becomes easier to understand the withdrawal of CH3, etc. Become. Figure 6 shows the starting mass as 6.
M/Z, the period is set to 14 M/Z, and an example is shown in which separate pie charts A, B, and C are displayed. In this case, the pie chart setting table 4 only specifies the individual display, start mass, and period of the pie graph, and does not need to have registered contents as shown in FIG. 3. In Figure 7, the start mass is aM/Z and the period is b-a (-c-b).
An example is shown in which the images are set to M/Z and displayed in an overlapping manner. Here, the start mass is 6 M/Z and the period is 15 M/Z.
When set to Z, a is 6 M/Z and b is 21 M/Z.
Z, c becomes 36 M/Z. In the case of this display, the colors can be simply overwritten and displayed for each cycle, or 6b can be displayed by adding the intensity of the peaks that match each cycle, or the intensity of the peaks that match each cycle can be added and displayed. By subtracting and displaying the intensity, it is possible to easily recognize the distribution for each period and periodic differences.

In addition, when the mass spectra are displayed separately in a plurality of pie charts as shown in FIG. 6, the display colors may not be divided into different colors, but may be the same display color. It goes without saying that the mass spectrum may be displayed all at once using a large mass range, without dividing it into a plurality of pie charts.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, if the periods match according to the set period, the spectra are displayed at the same position, so that periodic changes in the mass spectrum and their changes It is possible to easily understand the differences between the two, and it is possible to improve the efficiency of analysis processing and the processing speed.

At the same time, it is possible to reduce the burden on the operator.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining one embodiment of the present invention, Fig. 2 is a diagram for explaining measurement data, Fig. 3 is a diagram for explaining a pie chart setting table, and Fig. 4 is a diagram for explaining the peak Figure 5 is a diagram explaining the display contents by the mass spectrometry data analysis system to which the present invention is applied. Figure 6 is a diagram showing mass spectra in multiple pie charts with the minutes separated separately. FIG. 7 is a diagram showing an example of a display in which a plurality of pie charts are displayed in a superimposed manner. I...Mass spectrometer, 2...Input section, 3...Measurement data conversion processing section, 4...Piece graph setting table, 5.
...Display section. Patent Applicant: Yoshipu Abe, Patent Attorney, JEOL Co., Ltd. 1 Figure

Claims (2)

[Claims] (1) In a mass spectrometry data analysis system that displays measurement data using the mass number and the intensity corresponding to the mass number as the coordinate axes, a pie chart setting table for registering the display mass range and other parameters of the pie graph and the pie graph and a measurement data conversion processing means that converts the measurement data into pie chart display data according to the parameters of the setting table, and displays a pie chart of the measurement data by making the mass number and intensity correspond to the display angle of the pie chart and the length of the bar, respectively. A mass spectrum display method characterized by display. (2) Specify the display color for each pie chart as a parameter,
The mass spectrum display method according to claim 1, wherein a plurality of pie charts are displayed in a superimposed manner using designated colors.