ABSTRACT. The hygroscopic growth of particles produced from four different kinds of oils during deep frying, from sausages during grilling, and from burning wood in a stove was studied using a Tandem DifferentialMobility Analyzer. The size distributions and the soluble fractions of the particles were also measured. The median diameters of the particles from the oils were in the range of 168-200 nm and those from the sausages and the wood in the range of 55-80 nm. The median diameter and the geometric standard deviation of the particles from wood depended on wood burning with or without a flame. The soluble fractions of the particles from the oils were between 8% and 22%, and those from wood between 70% and 92%. The soluble fraction for particles from the sausages was 46%. The particles of the oil and sausage smokes did not grow and those of the wood smoke showed a significant growth. AEROSOL SCIENCE AND TECHNOLOGY 24: 15 1-160 (1996)
The hygroscopic growth of particles produced from 12 consumer spray products was studied to provide the quantitative basis for modeling their respiratory deposition. A tandem differential mobility analyzer (TDMA) was used for the measurement of growth of aerosol particles produced by spray from three disinfectants, four deodorants, four air fresheners, and a cooking medium. The soluble fractions of the aerosol particles were measured for each product and from the growth theory, the molecular weights of the products were estimated. The size distributions of the spray product aerosols were also measured using a low-pressure impactor. It was observed that some of the spray product aerosol do not grow at all, while others showed moderate to high growth. The growth ratio ranged from 1 to nearly 4 depending on the nature of the product and the initial size of the aerosol. The soluble fractions and molecular weights were in the range 0.04-0.96 and 15-700, respectively. The mass median aerodynamic diameters of the aerosols varied from 2.3 to 8.8 p m and geometric standard deviations from 2.0 to 3.8.
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