Asbestos, a mineral that was used extensively throughout much of the 20th century, can cause aggressive and fatal illnesses like mesothelioma, lung cancer, and asbestosis. While the use of asbestos has virtually been eliminated, this substance remains a huge threat to this day. Legacy asbestos, which refers to asbestos-containing materials that were installed in buildings, structures, or products before the dangers of asbestos became widely known, poses ongoing risks if disturbed or damaged. Because of the threat posed by asbestos, detecting the presence of this substance is crucial.
For a long time, transmission electron microscopy (TEM) has been the go-to method for detecting asbestos in schools, factories, and other buildings. To test for asbestos in buildings, inspectors have had to collect samples from the buildings and submit them to a specialized lab with highly trained staff for examination using TEM. Some states require or recommend using TEM for asbestos testing during the removal process in commercial properties.
However, transmission electron microscopy is complex and can be expensive. Another method that can be used to test for asbestos is phase contrast microscopy. This method is less costly and easier than TEM but less accurate. Now, researchers from the National Institute of Standards and Technology (NIST) say they have found a better way of detecting asbestos. NIST researchers Jason Holm and Elisabeth Mansfield say scanning electron microscopy (SEM) can be a suitable substitute for TEM in asbestos testing. The researchers say that SEM can produce results comparable to TEM. SEM, which is cheaper and more convenient than TEM, could speed up and reduce the expenses associated with asbestos remediation in the U.S.