Hey guys/girls,
My friend asked me this question, but I cant seem to find the answer to this. He is in IB program so quite different from A levels.
In Analytical Chemistry, there are several spectroscopy methods.
2 of them are Atomic Absorption and UV-Vis.
Both apparently can be used to detect and quantify the concentration of metal ions present in a sample.
So when do we know which method to use? Are there any significant advantages for one over the other?
Hope some experts here can help me to help my friend.. Thanks!!
And good luck to all taking their major exams this year!
Originally posted by contemporarydancer:Hey guys/girls,
My friend asked me this question, but I cant seem to find the answer to this. He is in IB program so quite different from A levels.
In Analytical Chemistry, there are several spectroscopy methods.
2 of them are Atomic Absorption and UV-Vis.
Both apparently can be used to detect and quantify the concentration of metal ions present in a sample.
So when do we know which method to use? Are there any significant advantages for one over the other?
Hope some experts here can help me to help my friend.. Thanks!!
And good luck to all taking their major exams this year!
There are many advantages and disadvantages of both methods so a more specific question of what your friend wanna analyse would make it eaiser to offer help.
AAS does elemental analysis, u need to change the AAS lamp for each different metal. Eg a Na lamp can only be use to analyse Na and not K etc.
UV can analyse multiple compounds but for UV-vis to work, the compound must firstly be able to absorb UV light in the first place or be coloured to absorb vis light. If they can't then UV cannot be use. The peak absorbance of the mixture cannot be too similar as well if not the results will overlap and it might be harder for analysis.
Wiki is a good source for info if your friend wants to know more about the 2 methods since theres quite alot to compare about the 2 of them and i don't feel like doing an essay on them.
Originally posted by UltimaOnline:(edited – dkcx has already replied TS liao)
Spectroscopy’s not my area (moreover that it’s not relevant to my work now), so I have nothing to add.
As an aside, in addition to any school notes for any students (eg. IB, ‘A’ Level H2, Poly Diploma, etc), always take advantage of the world’s most wonderful encyclopedia (don’t think just because it’s free means it’s lousy, it’s actually more up to date than any other encyclopedia available to the general public) Wikipedia :
http://en.wikipedia.org/wiki/Spectroscopy http://en.wikipedia.org/wiki/Atomic_absorption_…
Haha, sorry for posting a few seconds before you to make whatever you edit whatever you wanted to post