Sharp line source, Chemistry

Sharp line source:

When the bandwidth of the primary radiation is low with respect to the profile of the analyte absorption, the given amount of analyte would absorb more radiation. Thus, the radiation sources having low widths of the emitted analyte lines are preferred. A continuous radiation sources on the other hand have low radiant densities and do not provide sufficiently high sensitivity.

Alkali metals have low ionisation energies and even at the low temperatures obtained in the flame a sufficient amount of the sample may be in the excited or ionised state. That means that the concentration of the analyte atoms in the ground state will not be a true representation of the analyte concentration. As the AAS method depends on the radiation absorption by the analyte in ground state it is not ideal for such determinations. Flame photometry would be the method of choice for such determinations.

Posted Date: 1/10/2013 2:55:09 AM | Location : United States







Related Discussions:- Sharp line source, Assignment Help, Ask Question on Sharp line source, Get Answer, Expert's Help, Sharp line source Discussions

Write discussion on Sharp line source
Your posts are moderated
Related Questions
The tendency to form electrovalent bond is largest in (1)  A                                         (2) B (3)  C                                          (4)  D



Functions of nucleic acid: Nucleic acid has two major functions (a) Replication and (b) Protein synthesis.


Acidic Nature of Phenol - Hydrocarbon The acidic nature of phenol is observed in the following: (1) Phenol changes blue litmus to red. (2) Highly electropositive metals r

Q Explain Working of Galvanic Cell? Ans. There are several types of electrochemical cells. One type of electrochemical cell is called a galvanic cell . (A battery is a galvan

alkali metals belong to s-block in the periodic table ,why?

Nitrogen atom has an atomic number of 7 and oxygen has an atomic number 8. The total number of electrons in a nitrate ion will be: (1) 8        (2) 16      (3) 32

The hydration of propene The hydration of propene includes the usual mechanistic steps of alkene protonation to form a carbocation followed by the nucleophilic reaction of wate