Podcast
Questions and Answers
What is the primary function of the ion repeller in a mass spectrometer?
What is the primary function of the ion repeller in a mass spectrometer?
- To deflect the ions according to their masses
- To accelerate the ions to the same kinetic energy
- To persuade the positive ions out of the ionisation chamber (correct)
- To ionize the sample particles
What type of compounds are more likely to form multiple charged ions?
What type of compounds are more likely to form multiple charged ions?
- Hetero aromatic compounds (correct)
- Inorganic compounds
- Homo aromatic compounds
- Aliphatic compounds
What is the typical charge carried by most positive ions formed in a mass spectrometer?
What is the typical charge carried by most positive ions formed in a mass spectrometer?
- +1 (correct)
- Variable
- +2
- +3
What is the reason for the predominance of positive ions in electronic impact ionization?
What is the reason for the predominance of positive ions in electronic impact ionization?
What determines the amount of deflection of ions in a magnetic field in a mass spectrometer?
What determines the amount of deflection of ions in a magnetic field in a mass spectrometer?
What determines the amount of deflection of an ion in a mass spectrometer?
What determines the amount of deflection of an ion in a mass spectrometer?
What is the purpose of the three slits with voltage in the decreasing order in a mass spectrometer?
What is the purpose of the three slits with voltage in the decreasing order in a mass spectrometer?
What is the characteristic of metastable ions in terms of kinetic energy?
What is the characteristic of metastable ions in terms of kinetic energy?
What is the process by which metastable ions arise?
What is the process by which metastable ions arise?
How do mass spectrometers typically work with ions?
How do mass spectrometers typically work with ions?
What happens to ions that collide with the walls of the mass spectrometer?
What happens to ions that collide with the walls of the mass spectrometer?
What is the result of bombarding molecules with an electron beam of energy between 10-15ev?
What is the result of bombarding molecules with an electron beam of energy between 10-15ev?
What is the ultimate goal of the acceleration process in a mass spectrometer?
What is the ultimate goal of the acceleration process in a mass spectrometer?
What is the characteristic of metastable peaks in a mass spectrum?
What is the characteristic of metastable peaks in a mass spectrum?
What is the purpose of studying negative ions in mass spectrometry?
What is the purpose of studying negative ions in mass spectrometry?
What is the process called when molecular ions break down into various fragments due to high excitation?
What is the process called when molecular ions break down into various fragments due to high excitation?
What is the type of ion that is formed when a molecule is ionized by removal of one electron?
What is the type of ion that is formed when a molecule is ionized by removal of one electron?
What is detected as an electric current in the mass spectrometer?
What is detected as an electric current in the mass spectrometer?
