March 28, 2024, 10:03:10 AM
Forum Rules: Read This Before Posting


Topic: luminescence spectrometry  (Read 3194 times)

0 Members and 1 Guest are viewing this topic.

Offline tetty

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
luminescence spectrometry
« on: October 10, 2007, 10:33:46 AM »
hello all!
I want to learn what are the differences in atomic floresence spectrometry and molecular floresence spectrometry, these are look like similar.
thanks !
« Last Edit: October 11, 2007, 02:54:52 AM by tetty »

Offline ARGOS++

  • Sr. Member
  • *****
  • Posts: 1489
  • Mole Snacks: +199/-56
  • Gender: Male
Re: luminescence spectrometry
« Reply #1 on: October 11, 2007, 09:48:41 AM »

Dear Tetty,

I believe that you intermix two terms of spectroscopy for one moment.
The cause for that lies in the term “Luminescence”!
Luminescence” in opposite to “Incandescence” defines a so called “Cold Radiation of Light”, and follows therefore other rules as the “Black Body Radiation” (=BBR)!
In the “Cold State” you will find very less only “Pure Atomic Compounds” for such analysis.
For “Luminescence” there are a lot of different Energy sources known to populate the excited state of the molecule.

So “Atomic Fluorescence” is ??“miss-“?? used as a “Luminescence”; it is in real a “Incandescence”, because it heats the atom or compound inside a flame/plasma till it emits Light by itself (BBR), and at that temperature almost all compounds/molecules are already destroyed anyway ( to only atoms?)!
As more kind of Fluorescences as you include as more complicate it will go, and as less consequent/clear the terms are differentiated, too.

Quintessence:   Don’t interchange “Luminescence” and “Fluorescence” in general, as you did!
 
Good Luck!
                    ARGOS++


Sponsored Links