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November 01, 2025, 01:02:07 pm

Author Topic: AAS vs UV-Vis?  (Read 3686 times)  Share 

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BoredSatan

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AAS vs UV-Vis?
« on: June 14, 2011, 09:15:03 pm »
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This was from Insight 2008.

All types of spectroscopy use a part of the electromagnetic spectrum. One spectroscopic technique is used in the analysis of sodium chloride in potato chips. This technique uses radiation from the visible part of the electromagnetic spectrum to give quantitative information.
i. Name the spectroscopic technique used in this analysis.

The answer is:
Atomic absorption spectroscopy

Because: Only atomic absorption spectroscopy can quantitatively analyse metal atoms present, such as when sodium chloride is sprayed into the flame and visible light of the correct wavelength passes through the excited sodium atoms. The other spectroscopic techniques (e.g. UV-visible, IR and NMR) use radiation in the part of the spectrum that is not visible.

I thought UV-Visible uses light in the visible spectrum?
Can anyone help me with this please?
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vea

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Re: AAS vs UV-Vis?
« Reply #1 on: June 14, 2011, 09:17:17 pm »
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Yeah, UV-Vis uses light in both the visible and the UV spectrum. The answers are wrong, chill bok. :)
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BoredSatan

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Re: AAS vs UV-Vis?
« Reply #2 on: June 14, 2011, 09:17:46 pm »
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Yeah, UV-Vis uses light in both the visible and the UV spectrum. The answers are wrong, chill bok. :)
cheers vinny :)
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homosapiens

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Re: AAS vs UV-Vis?
« Reply #3 on: June 14, 2011, 09:19:21 pm »
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Yeah UV-Vis uses light in the UV and visible spectra, not too sure what they're going on about there. I think they mean those can't analyse the presence of metals like AAS can?

GuessWho

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Re: AAS vs UV-Vis?
« Reply #4 on: June 14, 2011, 09:33:26 pm »
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Hmm I put AAS as my answer for that one. Basically what I do, is when I see a metal just circle AAS lol

cltf

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Re: AAS vs UV-Vis?
« Reply #5 on: June 14, 2011, 09:36:06 pm »
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Hmm I put AAS as my answer for that one. Basically what I do, is when I see a metal just circle AAS lol
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Re: AAS vs UV-Vis?
« Reply #6 on: June 14, 2011, 09:54:34 pm »
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Hmm I put AAS as my answer for that one. Basically what I do, is when I see a metal just circle AAS lol
LIKE

Haha that's my default too :)

BoredSatan

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Re: AAS vs UV-Vis?
« Reply #7 on: June 14, 2011, 10:27:08 pm »
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cheers guys :D
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