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Sampling Methods: Sample Types01:18

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Sampling materials are classified into three main types: solid, liquid, and gas.
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Effective sample preparation is crucial for accurate and reliable laboratory analysis. During this process, two significant sources of error can arise: concentration bias from improper sample splitting and contamination caused by methods used to reduce particle size, such as grinding or homogenization. Identifying and minimizing these potential errors is crucial to ensuring the validity of the analysis.
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Design and Construction of an Urban Runoff Research Facility
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Development, design and validation of solid reference samples.

Claude Bailat1, François Bochud1, Frédéric Juget1

  • 1Institute of Radiation Physics, Lausanne, Switzerland.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
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PubMed
Summary

A new epoxy sample preparation method ensures high homogeneity within and between samples, better than 2%. This validated technique guarantees the traceability of epoxy samples for accurate scientific analysis.

Keywords:
ActivityEpoxyGamma spectrometryRadionuclideSolid sampleStandards

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Area of Science:

  • Materials Science
  • Analytical Chemistry

Background:

  • Accurate sample preparation is crucial for reliable analytical results.
  • Epoxy compounds are widely used in various scientific applications, requiring precise characterization.

Purpose of the Study:

  • To develop and validate a novel sample preparation method for epoxy compounds.
  • To assess the homogeneity of prepared epoxy samples both within and between batches.

Main Methods:

  • Development of a sample preparation technique utilizing epoxy compounds.
  • Two-step validation process involving homogeneity assessment.
  • Scanning of radioactive epoxy-filled tubes to determine within-sample homogeneity.
  • Evaluation of between-sample homogeneity over a 4.5-hour dispensing period.

Main Results:

  • Achieved within-sample homogeneity better than 2% for radioactive epoxy samples.
  • Demonstrated between-sample homogeneity better than 2% during a 4.5-hour dispensing time.
  • Confirmed the reliability and reproducibility of the developed sample preparation method.

Conclusions:

  • The developed epoxy sample preparation method is validated and reliable.
  • The method ensures high homogeneity, critical for accurate measurements.
  • This technique establishes traceability for epoxy samples in scientific studies.