Sampling Procedures
Two hundred and fifty-four air samples were collected at
various sites on a campus university; these included the
study areas in the library, teaching rooms, offices, bookshops,
and restaurants. One outdoor sample was taken every
day at the plant room during the measurement period, and
a total of 43 outdoor samples were taken. The samples were
collected using the Burkard Single-Stage Air Sampler
with agar plates.