6. which is not a cause of non-linear absorption data? (A) high concentration 36
ID: 527201 • Letter: 6
Question
6. which is not a cause of non-linear absorption data? (A) high concentration 360 nm (B high ionic strength of all solutions (C) large slit width ultiplier D) stray light reaching the detector ltiplier nization has which advantage relative to 7. Chemical electron impact? ouple (A) Higher mass resolution tiplier (B) Increased molecular ion signal (C) Improved total ionization efficiency (D) Increased fragmentation for improved library searching 8. Electron ionization (ED is a very common form of ionization in mass spectrometry. What is a m advantage of using 70ev as the electron energy in EI ionization source? (A) limits fragmentation (B) maximizes filament lifetime (C) maximizes ionization efficiency (D) maximizes mass resolution 9. What is true for time-of-flight mass spectrometers? (A) mass spectrum acquisition time less than 100 ms for tandem mass spectrometry must be used with a MALDI ionization source (D) m/z range limited to approximately 0-1000 daltons 10. Which mass analyzer would be the best choice to analyze molecules with an m of 20,000? (A) Ion-trap (B) Single quadrupole (C) Time-of-flight (D) Triple quadrupole separ 12. An ion i (A) the V (B) the r (C) the n (D) the k 13. In MALD of the pro (A) ioniz (B) abso (C) deso (D) fra 14. Which is (A) a (B) a sta (C) a M (D) an e 15. To minim concentra (A) emp (B) sele resp (C) adj D) allExplanation / Answer
Question 6
High concentration may cause non-linearity because Beer-Law is usually only valid in a certain range of concentrations.
A large slit width may cause a deviation of the Beer-Law, thus it might cause a non-linearity.
Stray light will affect the S/N signal, so it will cause a non-linear effect.
Thus, the correct answer is B.
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