1.What are the essential features of electron impact, chemical ionization, electro spray ionization, atmospheric pressure chemical...

1.What are the essential features of electron impact, chemical ionization, electro spray ionization, atmospheric pressure chemical ionization and ramped ionization mode used in mass spectrometry include whether each is hard or soft process and what are the main benefits or limitations of each. 2. What is an ion reflectance mirror and why is it used in time of flight mass spectrometry

Expert Solution

queen_honey_blossom answered 2 years ago

Describe the ionization mechanisms for (a) electron impact (EI) ionization, (b) chemical ionization (CI), (c) electrospray...

Describe the ionization mechanisms for (a) electron impact (EI) ionization, (b) chemical ionization (CI), (c) electrospray ionization (ESI), and (d) atmospheric-pressure chemical ionization (APCI).

What are the essential features of the following type of ionization mode used in mass spectrometry?...

What are the essential features of the following type of ionization mode used in mass spectrometry? Include whether it is a hard or soft process and what are the main benefits and/or limitations. a) Ramped or “Smart Fragmentation” (i mostly need this one) b) chemical ionization c) Atmospheric pressure chemical ionization

Stepwise Ionization by Electron Impact. Estimate a stepwise ionization rate coefficient in Ar at electron temperatures...

Stepwise Ionization by Electron Impact. Estimate a stepwise ionization rate coefficient in Ar at electron temperatures of 0.5 and 1 eV, assuming quasi-equilibrium between plasma electrons and electronic excitation of atoms. Comment on why the stepwise ionization is a preferential one in thermal plasmas and less important in non-thermal discharges.

Two ionization methods – electron ionization and chemical ionization. Briefly discuss the process involved in ion...

Two ionization methods – electron ionization and chemical ionization. Briefly discuss the process involved in ion formation for each method, and discuss the advantages/disadvantages of each method in identification of an unknown compound.

What is the essential features of the price system and what is the role of a...

What is the essential features of the price system and what is the role of a middleman. Please thoroughly explain.

1) Somewhere along the flow stream in a siphon the pressure is less than atmospheric pressure....

1) Somewhere along the flow stream in a siphon the pressure is less than atmospheric pressure. True False 2)it is reasonable to expect that the top speed of the boat will approximately double if a 9 Hp boat motor is replaced with an 18 Hp boat motor, All else being equal, True False 3)In a steady-state flow, it is not possible for fluid parcels of fixed identity to accelerate. True False

What is the theoretical boiling point of 1 M NaCol at sea level (normal atmospheric pressure)?...

What is the theoretical boiling point of 1 M NaCol at sea level (normal atmospheric pressure)? What is the freezing point of the same solution? Show calculations.

1)With the aid of a diagram, describe the functions of an electron ionization source for mass...

1)With the aid of a diagram, describe the functions of an electron ionization source for mass spectrometer used in atomic mass spectrometry. 2) What are the functions of the ionising and accelerating chambers in a mass spectrometer? 3) Briefly, but informatively, describe a time of flight (ToF) mass spectrometer. What do you think are the advantages and limitations of ToF over Qaudrupole mass analysers?

1) The ionization energy of an atom is the energy required to remove an electron from...

1) The ionization energy of an atom is the energy required to remove an electron from the atom in the gaseous state. Arrange the following elements in order of decreasing ionization energy. molybdenum silver germanium phosphorus strontium 2) The metallic character of an element is defined as the properties typical of a metal, especially the tendency to lose electrons in chemical reactions. Arrange the following elements in order of decreasing metallic character. F Cr P Zn Ca Cs S

Perform the following pressure conversions, assuming when necessary that atmospheric pressure is 1 atm. Unless otherwise...

Perform the following pressure conversions, assuming when necessary that atmospheric pressure is 1 atm. Unless otherwise stated, the given pressures are absolute (8 points) 1) 200 mm Hg to psi 2) 275 ft H2O to kPa 3) 3.00 atm to N/cm2 4) 280 cm Hg to Dyne/m2 5) 20 cm Hg of vacuum to atm. (absolute) 6) 25.0 psig to mm Hg (gauge) 7) 25.0 psig to mm Hg (absolute) 8) 35.0 psi to cm of CCl4

Question