Laser Induced Breakdown Spectroscopy

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SUMMARY

The discussion centers on the challenges faced when using Laser Induced Breakdown Spectroscopy (LIBS) for elemental analysis of human nails. The user encounters interference from the metal sample holder, which results in unwanted emission lines. Recommendations include increasing the sample volume, ensuring the laser focuses solely on the sample, and conducting a baseline measurement without the sample to subtract from the final results. Adjusting the focusing lens may also be necessary to achieve optimal results.

PREREQUISITES
  • Understanding of Laser Induced Breakdown Spectroscopy (LIBS)
  • Familiarity with optical focusing techniques and lens specifications
  • Knowledge of elemental analysis methods
  • Experience with baseline measurement techniques in spectroscopy
NEXT STEPS
  • Research optimal focusing lens specifications for LIBS applications
  • Learn about sample preparation techniques for LIBS to minimize interference
  • Study baseline measurement methods in spectroscopy for accurate data analysis
  • Investigate alternative sample holder materials that do not interfere with LIBS results
USEFUL FOR

Researchers and technicians in analytical chemistry, particularly those involved in elemental analysis using LIBS, as well as anyone troubleshooting interference issues in spectroscopic measurements.

Avery_quinn
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Hi, I'm trying to use LIBS technique to figure out elemental analysis of human nails. But every time i run the experiment, i get the emission line of metal instead. The sample holder is indeed made up of metal. What should I do to overcome this problem?

Since i have small size sample, I'm using focusing lens with fl 15cm to focus the laser but there's no spark. Should i stop using lens? or should i use lens with different fl? Thanx!
 

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Ive never used LiBS but try
-increasing your sample volume
-having the laser focus only on the sample
-run a baseline with no sample and subtract this baseline signal from the sample measurement
 
thank you for your advice.
 

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