Do we really need SEVEN new aerosol particle sampling conventions?

The rationale behind recently proposed aerosol particle sampling conventions is discussed. The conventions are tailored toward estimation of dose to specific areas of the human respiratory tract prior to possible dissolution or clearance. Allowance is made for inter- and intra-person variation. Particle size from sub- to supermicrometer size is covered. The intent is to spur the development of personal sampling equipment for improved correlation between workplace assessment and health response.