Mass spectrometry method and mass spectrometer
A method for performing mass spectrometry by causing a precursor ion derived from a sample component and a radical to react in a reaction chamber 132 to generate products ion from the precursor ion, the method including: a step 6 of generating a radical from a material gas; a step 8 of introducing the radical and the precursor ion into the reaction chamber 132 in a state where an amount of electric power corresponding to a generation condition of the radical is supplied to a temperature control part 1331 provided in the reaction chamber 132 ; and a step 9 of separating and detecting product ions generated from the precursor ion in the reaction chamber 132 according to a mass-to-charge ratio.
1 . A mass spectrometry method for performing mass spectrometry by causing a precursor ion derived from a sample component and a radical to react in a reaction chamber to generate product ions from the precursor ion, the method comprising:
a step of generating a radical from a material gas;
a step of introducing the radical and the precursor ion into the reaction chamber in a state where an amount of electric power corresponding to a generation condition of the radical is supplied to a temperature control part provided in the reaction chamber; and
a step of separating and detecting product ions generated from the precursor ion in the reaction chamber according to a mass-to-charge ratio.
2 . The mass spectrometry method according to claim 1 , wherein a predetermined amount of electric power is supplied to the temperature control part to maintain the reaction chamber at a predetermined temperature in a time period before a start of measurement and/or after an end of measurement, and the amount of electric power supplied to the temperature control part is changed to the amount corresponding to the radical generation condition in a part or all of a time period during measurement.
3 . The mass spectrometry method according to claim 1 , wherein the radical generation condition includes a type of the material gas, a type of the radical generated from the material gas, and a flow rate of the material gas.
4 . The mass spectrometry method according to claim 1 , wherein in a time period in which the radical is introduced into the reaction chamber, the amount of electric power corresponding to the radical generation condition is supplied to the temperature control part regardless of whether or not the precursor ion is introduced.
5 . A mass spectrometer comprising:
a reaction chamber into which a precursor ion is introduced;
a temperature control part provided in the reaction chamber;
a power supply part configured to supply electric power to the temperature control part;
a radical generation part configured to generate a radical from a material gas to introduce the radical into the reaction chamber;
a measurement control part configured to control operations of the power supply part and the radical generation part so as to supply, to the temperature control part, an amount of electric power corresponding to a radical generation condition in the radical generation part in a time period in which the radical is introduced into the reaction chamber;
a mass separation part configured to separate product ions generated from the precursor ion in the reaction chamber according to a mass-to-charge ratio; and
an ion detection part configured to detect ions separated by the mass separation part.
6 . The mass spectrometer according to claim 5 , wherein
the reaction chamber is a collision cell.