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NIST Standards for Microanalysis and the Certification Process.

R B Marinenko1

  • 1National Institute of Standards and Technology, Gaithersburg, MD 10899-8371.

Journal of Research of the National Institute of Standards and Technology
|July 23, 2016
PubMed
Summary

The National Institute of Standards and Technology (NIST) reviews its long history of developing microanalysis standards. Automation and computerization have significantly improved the costly and time-consuming certification process.

Keywords:
certificationelectron microprobemicroanalysis standardsmicroheterogeneitymicrohomogeneitystandard reference materials for microanalysis

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Metrology

Background:

  • The National Institute of Standards and Technology (NIST) has developed microanalysis standards since the 1960s.
  • Certification of traceable standards is essential for inter-laboratory comparisons.
  • Microheterogeneity within specimens introduces complexity and uncertainty in certified values.

Purpose of the Study:

  • To review the historical process of certifying microanalysis standards.
  • To highlight improvements in certification driven by technological advancements.
  • To discuss the impact of automation and computerization on standard development.

Main Methods:

  • Historical review of NIST's standard development and certification procedures.
  • Analysis of factors contributing to the cost and time of certification.
  • Examination of the role of microheterogeneity in uncertainty assessment.

Main Results:

  • Certification processes have evolved significantly over decades.
  • Automation and computerization have streamlined and improved accuracy.
  • Addressing microheterogeneity remains a key challenge in standard development.

Conclusions:

  • NIST's commitment to microanalysis standards has been continuous.
  • Technological integration has enhanced the efficiency and reliability of certification.
  • Ongoing research is vital for refining standards and reducing uncertainty.