In this module I have posed before you some typical questions which you could come across during interview sessions when you apply for a job involving use of atomic absorption spectrometers. I have deliberately not provided you with tailored made answers and the objective is to motivate you to look for the answers. I’m sure that if you review the earlier modules on the topic you’ll find all your answers. This exercise will encourage you to search for solutions that you are faced with not only in atomic absorption spectroscopy but in other areas of your activity as well. I request all to look for answers and in case you wish to have some clarifications or share your views you are welcome to participate in discussion forums so that other readers also get the benefit..
Q1. Explain briefly the principle of operation of an Atomic Absorption Spectrometer?
Q2. What is the difference in operation principle of AAS and AES?
Q3. Why is nitrous oxide used as oxidant in some applications?
Q4. What are the advantages of using Electrodeless discharge lamps over Hollow cathode lamps as light sources for analysing some elements?
Q5. What are the advantages of double beam over single beam operation?
Q6. What is the role of a flow spoiler or an impact bead in the spray chamber? Explain the benefits of each over the other.
Q7. What is the role of a monochromator in the atomic absorption spectrometer?
Q8. What do you understand by deuterium background correction and what are its limitations?
Q9. Explain the benefits of graphite furnace analysis over flame analysis?
Q10. What are the limitations in analysis of analysis of volatile elements such as As, Sn, Pb,Sb ,etc What alternate sample treatment option is commonly used for such analysis?
Wishing you good luck for your future pursuits and looking forward to our long time association.