What analytical method is associated with personal air sampling of airborne fibers in PCM?

The NIOSH 7400 Method is specifically designed for the analysis of airborne fibers, particularly asbestos, in personal air sampling. This method employs polarized light microscopy (PLM) to identify and quantify asbestos fibers based on their optical properties. It is widely recognized and accepted by regulatory agencies for its effectiveness in evaluating airborne asbestos exposure levels.

The other methods mentioned serve different purposes. For instance, the EPA 600 Method is typically related to environmental sampling and analyses, while ASTM D1822 focuses on testing the properties of materials rather than fiber analysis. The OSHA 1910 Method encompasses a range of regulations and guidelines for workplace safety, but it does not specifically pertain to the analysis of asbestos fibers in personal air samples. Thus, the NIOSH 7400 Method is the most appropriate choice for this particular task in asbestos air monitoring.