SYMPOSIA PAPER Published: 20 December 2021
STP163220200051

Detection Limit (LOD) and Limit of Quantification (LOQ) Using Microscopical Methods in Asbestos Analysis

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Optical methods (light or electron microscopy) are, in most cases, the basis for measuring the asbestos concentration either in air or in materials. The individual methods are described in a variety of guidelines or standards. The definition of terms like detection limit and analytical sensitivity have led to numerous discussions, driven by the fact that in some cases concentrations that are real and not a misinterpretation are reported as below the stated detection limit. In this paper, different approaches for a detection limit (LOD) as appear in ISO, VDI, and ASTM documents are discussed and the main parameters influencing the value of the LOD are described. In addition, a concept for calculating a limit of quantification (LOQ) both for air and material analysis is described.

Author Information

Koenig, Reiner
APC GmbH, Eschborn, DE
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Pages: 327–340
DOI: 10.1520/STP163220200051
ISBN-EB: 978-0-8031-7711-6
ISBN-13: 978-0-8031-7710-9