1. Which one of the following is NOT a mass analyzer? (3 points) (A) Quadrupole, (B)...

 

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1. Which one of the following is NOT a mass analyzer? (3 points) (A) Quadrupole, (B) Double-focusing analyzer, (C) Electrostatic sector analyzer, (D) TOF, (E) All above are mass analyzers. 2. What is the major component in the torch of ICP-MS? (A) Methane; (B) Hydrogen; (C) Oxygen (D) Argon; (E) Nitrogen. 3. Which of the following is the most suitable to directly analyze total mercury contents in an environmental sample? (3 points) (A) MS Chemical Ionization with double focusing MS; (B) ESI-quadrupole; (C) Inductively-coupled plasma (ICP) MS; (D) MALDI-TOF MS; (E) All above are equally suitable. 4. What chemical content in a sample is coulometric Karl Fischer titration particularly designed to analyze? (3 points) (A) 0₂ (B) CO2; (C) Glucose; (D) H₂O; (E) Lead ion 5. Which of the mass analyzers below is supposed to have the best resolution. (3 points) (A) Quadrupole; (B) Ion trap; (C) Time of flight; (D) Magnetic sector analyzer; (E) FT(ICR). 6. Which one of the following statements is INCORRECT about Fourier transform-ICR MS? (3 points) (A) Each ion moves in a circular path in the analyzer cell with constant angular frequency although its linear velocity can be changed. (B) The image current caused by the circular movement of a packet of ions with the same mass-to-charge ration decays over a period of time with constant frequency. (C) The raw data of measurement is the image currents in the time domain, which is then mathematically converted to the frequency-domain signals by Fourier transform. (D) To scan a mass spectrum over a wide range of mass, a radio-frequency pulse with a single frequency over a very short time (e.g., 5 ms) increases the kinetic energy of all ions. (E) All above are correct statements. 1. Which one of the following is NOT a mass analyzer? (3 points) (A) Quadrupole, (B) Double-focusing analyzer, (C) Electrostatic sector analyzer, (D) TOF, (E) All above are mass analyzers. 2. What is the major component in the torch of ICP-MS? (A) Methane; (B) Hydrogen; (C) Oxygen (D) Argon; (E) Nitrogen. 3. Which of the following is the most suitable to directly analyze total mercury contents in an environmental sample? (3 points) (A) MS Chemical Ionization with double focusing MS; (B) ESI-quadrupole; (C) Inductively-coupled plasma (ICP) MS; (D) MALDI-TOF MS; (E) All above are equally suitable. 4. What chemical content in a sample is coulometric Karl Fischer titration particularly designed to analyze? (3 points) (A) 0₂ (B) CO2; (C) Glucose; (D) H₂O; (E) Lead ion 5. Which of the mass analyzers below is supposed to have the best resolution. (3 points) (A) Quadrupole; (B) Ion trap; (C) Time of flight; (D) Magnetic sector analyzer; (E) FT(ICR). 6. Which one of the following statements is INCORRECT about Fourier transform-ICR MS? (3 points) (A) Each ion moves in a circular path in the analyzer cell with constant angular frequency although its linear velocity can be changed. (B) The image current caused by the circular movement of a packet of ions with the same mass-to-charge ration decays over a period of time with constant frequency. (C) The raw data of measurement is the image currents in the time domain, which is then mathematically converted to the frequency-domain signals by Fourier transform. (D) To scan a mass spectrum over a wide range of mass, a radio-frequency pulse with a single frequency over a very short time (e.g., 5 ms) increases the kinetic energy of all ions. (E) All above are correct statements.

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The detailed answer for the above question is provided below 1 The correct answer is B Doublefocusing analyzer It is a type of magnetic sector analyze... View the full answer