Fig. 2
From: Performance evaluation of high-volume electret filter air samplers in aerosol microbiome research
Physical sampling efficiencies. Sampling efficiencies (%) for SASS and Bobcat relative to gelatin reference filters. Sampling efficiency was determined with a common manual filter extraction procedure and sampler-specific semi-automated filter extraction procedures. Aerosol chamber testing was performed with 1 μm (left panels) and 3 μm (right panels) aerosol particles containing Uranine (bottom panels) as a fluorescent tracer and BG spores (top panels) as a biological tracer. The number of samples analyzed for each condition was N = 15 for SASS and N = 13 for Bobcat. Empirical cumulative distribution functions of sampling efficiencies are overlain the boxplots, and significance codes from Kolmogorov-Smirnov tests are indicated at the bottom of each sampler comparison (codes: *** P < 0.001, ** P < 0.01, * P < 0.05)