Jump to main content
Jump to site search

Issue 3, 2000
Previous Article Next Article

Recent trends in inter-laboratory precision at ppb and sub-ppb concentrations in relation to fitness for purpose criteria in proficiency testing

Author affiliations

Abstract

Recently conducted collaborative trials in which the analyte concentration was below 100 ppb provided reproducibility standard deviations that were systematically lower than the predictions of the Horwitz function. This study shows that such statistics are better represented by a model with a constant relative standard deviation. A modified function is suggested as suitable for use (with due caution) as a fitness-for-purpose criterion.

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 12 Jan 2000, accepted on 31 Jan 2000 and first published on 22 Feb 2000


Article type: Communication
DOI: 10.1039/B000282H
Citation: Analyst, 2000,125, 385-386
  •   Request permissions

    Recent trends in inter-laboratory precision at ppb and sub-ppb concentrations in relation to fitness for purpose criteria in proficiency testing

    M. Thompson, Analyst, 2000, 125, 385
    DOI: 10.1039/B000282H

Search articles by author