Protocols for Part 3
•Velocities of
the air in the ductwork were calibrated
to achieve velocities consistent with typical air flows and isokinetic air sampling.
•100% outdoor
air was used
•Isokinetic
(“equal-velocity”) Sampling:
nozzle
tip opening (An) and sampling flow rate
(Qm) must be
adjusted to obtain a velocity vn=Qm/An equal to the gas stream velocity
(vs) at the
point of sampling
•Shrouds were
made for the BioSamplers using these
calculations