
256 CHAPTER 9 Environmental and occupational health issues
most often used to determine a relative exposure to microscale particles is the time-
weighted mass concentration of each particular aerosol. However, due to the inherent
nature of the nanoscale particle, it is a widely accepted premise that the measurement
of mass is not a sufcient worker health exposure metric [5]. In contrast to traditional
theories about the health effects from microscale particle exposures, the detriments
from nanoparticles are likely to be dependent on the specic particle, its morphology,
surface, composition and size. Thus, ideally, a measurement of particle ...