Affordable Access

Publisher Website

Inter-laboratory comparison study on measuring semi-volatile organic chemicals in standards and air samples

Authors
Journal
Environmental Pollution
0269-7491
Publisher
Elsevier
Publication Date
Volume
158
Issue
11
Identifiers
DOI: 10.1016/j.envpol.2010.07.041
Keywords
  • Inter-Laboratory Variability
  • Pahs
  • Pbdes
  • Pcbs
  • Ocps
  • Air Measurements
  • Accuracy
  • Precision
Disciplines
  • Chemistry

Abstract

Abstract Measurements of semi-volatile organic chemicals (SVOCs) were compared among 21 laboratories from 7 countries through the analysis of standards, a blind sample, an air extract, and an atmospheric dust sample. Measurement accuracy strongly depended on analytes, laboratories, and types of standards and samples. Intra-laboratory precision was generally good with relative standard deviations (RSDs) of triplicate injections <10% and with median differences of duplicate samples between 2.1 and 22%. Inter-laboratory variability, measured by RSDs of all measurements, was in the range of 2.8–58% in analyzing standards, and 6.9–190% in analyzing blind sample and air extract. Inter-laboratory precision was poorer when samples were subject to cleanup processes, or when SVOCs were quantified at low concentrations. In general, inter-laboratory differences up to a factor of 2 can be expected to analyze atmospheric SVOCs. When comparing air measurements from different laboratories, caution should be exercised if the data variability is less than the inter-laboratory differences.

There are no comments yet on this publication. Be the first to share your thoughts.