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[Comparison of methods to determine analytical sensitivity]

E Shinkai1

  • 1Scientific Center, TOA Medical Electronics Co., Ltd., Kobe.

Rinsho Byori. the Japanese Journal of Clinical Pathology
|November 1, 1996
PubMed
Summary

Determining analytical sensitivity requires careful method selection. A proposed method involves analyzing zero-concentration samples, calculating mean and standard deviation, and converting M + 3SD to concentration for reliable sensitivity assessment.

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Area of Science:

  • Analytical Chemistry
  • Biomedical Measurement

Background:

  • Accurate analytical sensitivity is crucial for interpreting measurement results, especially in clinical diagnostics.
  • Existing methods for determining analytical sensitivity have limitations, impacting their routine applicability.

Purpose of the Study:

  • To compare different methods for determining analytical sensitivity.
  • To propose a practical and reliable method for assessing the analytical sensitivity of measurement techniques.

Main Methods:

  • Comparison of three distinct analytical sensitivity determination methods.
  • Evaluation of the t-distribution statistical test's appropriateness for analytical sensitivity assessment.
  • Proposal of a novel method using zero-concentration samples, mean (M), and standard deviation (SD).

Main Results:

  • The t-distribution method is deemed inappropriate due to yielding sensitivity values too low for routine data analysis.
  • A proposed method involves analyzing fifty replicates of zero-concentration samples, calculating M and SD.
  • Analytical sensitivity is defined as the concentration derived from M + 3SD, with practical sensitivity considered 3-5 times this value.

Conclusions:

  • The t-distribution method is unsuitable for determining analytical sensitivity.
  • A robust method for analytical sensitivity determination involves analyzing zero-concentration samples and calculating M + 3SD.
  • The proposed method offers a practical approach for assessing analytical sensitivity when real specimens are unavailable.

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