c hapter 3 atomic absorption spectroscopy n.
Download
Skip this Video
Download Presentation
C hapter 3 Atomic Absorption Spectroscopy

Loading in 2 Seconds...

play fullscreen
1 / 43

C hapter 3 Atomic Absorption Spectroscopy - PowerPoint PPT Presentation


  • 158 Views
  • Uploaded on

C hapter 3 Atomic Absorption Spectroscopy. 3.1. Theoretical Concepts 3.2. Atomic Absorption Instrumentation 3.3. Graphite Furnace Atomic Absorption 3.4. Control of Analytical Interferences. 3.1. Theoretical Concepts. The Atomic Absorption Process Theoretical Concepts

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'C hapter 3 Atomic Absorption Spectroscopy' - yamka


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
c hapter 3 atomic absorption spectroscopy
Chapter 3 Atomic Absorption Spectroscopy

3.1. Theoretical Concepts

3.2. Atomic Absorption Instrumentation

3.3. Graphite Furnace Atomic Absorption

3.4. Control of Analytical Interferences

3 1 theoretical concepts
3.1. Theoretical Concepts
  • The Atomic Absorption Process
  • Theoretical Concepts
  • Quantitative Analysis
  • Characteristic Concentration
  • Detection Limits
slide4

Fig3-2 Grotrian diagrams for K

Fig 3-3Grotrian diagrams for Na

2 theoretical concepts integral formula of aas fig 3 4 typical shape of a atomic absorption line
2. Theoretical Concepts⑴Integral Formula of AASFig 3-4 Typical Shape of A Atomic Absorption line
integral absorption formula by atomic theory
Integral Absorption FormulaBy atomic theory

(3.1)

By Line Shape Function

( the Nature distribute )

(3.2)

The Peak Absorption Coefficient k0 is:

(3.3)

slide10

When:

va>> ve,

and

v0a= v0e,

then kv≈k0,

slide12

(3.9)

(3.10)

4 control of analytical interferences
4. Control of Analytical Interferences

Ionization interference

Matrix interference

Chemical interference

Background interference

ionization interference
Ionization Interference

Ba → Ba+ + e-

K → K+ + e-

slide35

(4.13)

AHCL= Aa+ Ab

(4.14)

AD2=Ab,

(4.15)

Aa = AHCL- AD2

3 3 graphite furnace atomic absorption
3.3. Graphite Furnace Atomic Absorption
  • Graphite furnace atomizer components
  • The Graphite Furnace Power Supply and Programmer
  • Quantitative analysis GFAAS
  • Effect of Matrix on Height and Area
1 graphite furnace atomizer components
1. Graphite furnace atomizer components

The Graphite Furnace Atomizer

A basic graphite furnace atomizer is comprised of the following components:

· graphite tube

· electrical contacts

· enclosed water cooled housing

· inert purge gas controls

slide39

The Graphite Furnace Power Supply and Programmer

  • A Graphite Furnace Temperature Program
        • Drying
        • Pyrolysis
        • Cool Down(optional)
        • Atomization
        • Clean Out
        • Cool Down