APPLICABILITY: The working range is 0.5 to 10 mg/m3
for a 200-L air sample. The method measures the mass concentration of any
non-volatile respirable dust. In addition to inert dusts [4], the method has been recommended for respirable coal dust. The method is
biased in light of the recently adopted international definition of respirable dust, e.g., +7% bias for non-diesel, coal mine dust [5].