Filters are weighed in triplicate using a sensitive microbalance and anti-static blower. Relative Humidity is maintained between 30% and 40% and temperatures are kept between 20 and 25 degrees Celsius.
Nuclepore filters (1st-generation sampling equipment)
Nuclepore filters capture the coarse mode (PMc) fraction. They are translucent and contain far less black carbon than PM2.5.. Coarse-mode aerosols important information about the size distribution of other trace elements. They are also useful backdrops for scanning electron microscope images (courtesy of Dalhousie's SEM facility).