Which of the following is not a type of ionisation?
A. Field ionisation
B. Spontaneous ionisation
C. Spark ionisation
D. Chemical ionisation
Answer:B
Which of the following is not a type of ionisation?
A. Field ionisation B. Spontaneous ionisation C. Spark ionisation D. Chemical ionisation
Explanation: Spontaneous ionisation is not a type of ionisation. In mass spectrometer, ionisation is brought about by thermal or electrical energy.