Standard Practice for Asbestos Detection Limit Based on Counts
|Publication Date:||1 October 2006|
|ICS Code (Other standards related to air quality):||13.040.99|
This practice presents the procedure for determining the detection limit (DL)2 for measurements of fibers or structures3 using microscopy methods.
This practice applies to samples of air that are analyzed either by phase contrast microscopy (PCM) or transmission electron microscopy (TEM), and samples of dust that are analyzed by TEM.
The microscopy methods entail counting asbestos structures and reporting the results as structures per cubic centimeter of air (str/cc) or fibers per cubic centimeter of air (f/cc) for air samples and structures per square centimeter of surface area str/cm2) for dust samples.
2 The DL also is referred to in the scientific literature as Limit of Detection (LOD), Method Detection Limit (MDL), and other similar descriptive names.
3 For purposes of general exposition, the term "structures" will be used in place of "fibers or structures." In the examples in Section 8, the specific term, "fiber" or "structure," is used where appropriate. These terms are defined separately in Section 3.