2. Materials andmethods
2.1. Site location
The study was conducted in IIT Kanpur campus (26.5114° N, 80.2349°
E, and 142 mabove themean sea level). IIT Kanpur is situated beside the
Grand Trunk road. Since it is situated on the outskirts of Kanpur city, it has
a cleaner environment as compared to the rest of the city (Devi et al.,
2009). Indoor air sampling was done at three places, Hall 4 room, Atmospheric
Particle Technology laboratory (APTL) and Western laboratories.
2.2. Sampling procedure
Particulate matter was collected using a single stage impactor type
PM0.6 sampler (standardized against Aerodynamic Particle Sizer, APS).
Flowrate of samplerwas 12 LPMwhichwas controlled by the rotameter
(calibrated using amass flowmeter). Polytetrafluoroethylene (PTFE) or
Teflon filter papers with 47mmdiameter and 2 μmpore sizewere used