Difference between Chemical analysis and PMI

In summary, the conversation discusses the technical difference between chemical analysis and PMI (Positive material identification). PMI methods, such as X-Ray fluorescence technique and Optical Emission spectrometer, are used to quickly determine the chemical composition of metals. However, they may not provide information on certain elements, such as carbon. On the other hand, chemical analysis is a more complex process used for compound analysis and utilizes techniques such as Atomic Absorption, XRF, EDS, OES, GDS, and wet chemistry. It is important to note that while PMI is useful for analyzing alloys, it is not suitable for analyzing compounds, such as sugar in blood. The conversation also mentions that PMI is a more commonly used term in the industry
  • #1
krautkramer
25
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
 
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  • #2
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.
 
  • #3
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
 
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What is the difference between Chemical analysis and PMI?

Chemical analysis is the process of identifying and quantifying the chemical composition of a sample, while PMI (Positive Material Identification) is a specific type of chemical analysis used to identify the materials and their composition in industrial settings.

How are Chemical analysis and PMI performed?

Chemical analysis can be performed using different techniques such as spectroscopy, chromatography, and mass spectrometry, while PMI is typically performed using portable X-ray fluorescence (XRF) instruments.

What types of materials can be analyzed using Chemical analysis and PMI?

Chemical analysis can be used to analyze a wide range of materials, including liquids, gases, and solids. PMI is specifically used for analyzing metals and alloys.

What are the main applications of Chemical analysis and PMI?

Chemical analysis is used in various industries such as pharmaceuticals, food and beverage, and environmental testing. PMI is primarily used in industrial settings for quality control, material verification, and identifying unknown materials.

Are there any limitations to Chemical analysis and PMI?

Chemical analysis and PMI have their own limitations. For example, chemical analysis may not be able to detect trace levels of certain elements, while PMI may not be suitable for analyzing non-metallic materials. It is important to choose the appropriate technique based on the sample and the desired results.

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