Difference between Chemical analysis and PMI

Click For Summary
SUMMARY

The discussion clarifies the distinction between chemical analysis and Positive Material Identification (PMI). PMI, utilizing tools like the FRF analyser (X-Ray fluorescence) and Optical Emission Spectrometer, is primarily focused on analyzing metal alloys for elemental composition. In contrast, chemical analysis encompasses a broader range of techniques, such as Atomic Absorption and wet chemistry, aimed at detailed compound analysis. While PMI provides rapid elemental data, it is not suitable for all types of materials, such as organic compounds.

PREREQUISITES
  • Understanding of Positive Material Identification (PMI) techniques
  • Familiarity with X-Ray fluorescence (XRF) and Optical Emission Spectrometry (OES)
  • Knowledge of chemical analysis methods, including Atomic Absorption and wet chemistry
  • Basic concepts of metallurgy and material composition
NEXT STEPS
  • Research the principles and applications of Atomic Absorption spectroscopy
  • Explore the differences between XRF and OES for metal analysis
  • Learn about the various chemical analysis techniques used in metallurgy
  • Investigate the role of wet chemistry in material testing and analysis
USEFUL FOR

Metallurgists, quality control engineers, and professionals involved in material testing and analysis will benefit from this discussion, particularly those seeking to understand the applications and limitations of PMI and chemical analysis techniques.

krautkramer
Messages
25
Reaction score
0
Hi,

What is the technical difference between chemical analysis and PMI(Positive material identification)? Is it different name only or chemical analysis is a separate test? I found that FRF analyser (X-Ray fluorescence technique) or Optical Emission spectrometer (spark type gun with ultra pure argon gas) are used to find chemical composition of metals during PMI. XRF Analyser will not give carbon content,but spectrometer will give carbon content and other lighter elements also.So, I am :confused: with Chemical analysis term!Any help would be highly appreciated.

Thanks
 
Last edited:
Engineering news on Phys.org
PMI methods you listed above gives you fast info about quantities of elements sample contains.
Chemical analysis, which is more complex, meant for compounds analysis.

IE PMI is good for alloys analysis, but meaningless for checking sugar contents in the blood.
 
Thnks graniar for the reply.I was little bit confused with these two terms as PMI is the common term used by industry people.I did a bit research in the internet and found from Exova website that,Atomic Absorption, XRF, EDS, OES, GDS, wet chemistry are Metal's chemical analysis techniques. But,I have no idea about atomic absorption, EDS,GDS and wet chemistry and where these technique are being used.

http://www.exova.com/industry-sectors/metallurgy-a-general-engineering/services/metals-chemical-analysis
 
Last edited by a moderator:

Similar threads

Could New Materials Propel China's Industry to Bill Gates-Level Success?
  • · Replies 4 ·
Replies
4
Views
10K
The Controversial History of Atmospheric CO2 Measurements: A Critical Analysis"
  • · Replies 12 ·
Replies
12
Views
13K
Graduate Incandescence or Luminescence: How Do They Differ?
  • · Replies 4 ·
Replies
4
Views
16K
Investigation of hydrogen-on-demand systems (HODS)
  • · Replies 4 ·
Replies
4
Views
31K
Mathematica This Week's Finds in Mathematical Physics (Week 258)
  • · Replies 4 ·
Replies
4
Views
10K
Mathematica This Week's Finds in Mathematical Physics (Week 241)
  • · Replies 8 ·
Replies
8
Views
5K
What colors and attributes could alien flora & fauna have?
  • · Replies 15 ·
Replies
15
Views
6K