Finding F-0109

“The optical particle counter, influenced by particle light-scattering properties and density differences, underestimated the mass concentration of particles larger than 0.3 μm, capturing only 46.9% of the benchmark value.”

Wang et al. Cooking Fume Particulate Matter as an Indoor Air Pollution Source: Comparative Measurement Methods and Correction Factors (2026). Page 1. CKB 1077

Structure

Source: Cooking
Factor: Particulate matter (PM₂.₅ and PM₁₀)
Method: Optical particle counter
Setting: laboratory, CN
Study design: laboratory measurement-method comparison: cooking fumes generated under simulated typical cooking conditions, manual gravimetric analysis as benchmark against an optical particle counter (Promo 3000), a photometer (DustTrak 8533) and infrared spectrophotometry (class 4)
Effect: ratio 46.9
Caveat: underestimation attributed by the authors to light-scattering properties and density differences of cooking-fume particles

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