DESCRIPTION OF THE ACCOMPANYING DRAWINGS
FIG. 1 is a schematic view showing an example of the constitution for a mass spectrometer according to the invention;
FIG. 2 is a view showing an example of the constitution with a differential pumping part being omitted between an APCI ion source and an EI ion source;
FIG. 3 is a view showing an example of the constitution in which the length of a GC column for introducing a sample to the APCI ion source and that to the EI ion source are different;
FIG. 4 is a view showing an example of analysis where APCI ionization and EI ionization are switched;
FIG. 5 is a view showing an example of analysis where APCI ionization and EI ionization are switched;
FIG. 6 is a flow chart for explaining an example of a measuring sequence;
FIG. 7 is a view showing an example of analysis where APCI ionization and EI ionization are switched;
FIG. 8 is a view showing an example of analysis where APCI ionization and EI ionization are switched;
FIG. 9 is a constitutional view for the inside of an APCI ion source; and
FIG. 10 is a view showing an example of the constitution for making time difference between APCI ionization and EI ionization.