On January 26, 2011, the International Organization for Standardization (ISO) announced the availability of a new standard, ISO 10808:2010, entitled “Nanotechnologies — Characterization of nanoparticles in inhalation exposure chambers for inhalation toxicity testing.” The standard is intended to ensure that the results of inhalation toxicity tests of airborne nanoparticles are reliable and harmonized worldwide. According to ISO, the standard “establishes a battery of inhalation...