T The Constant of Kp and Kow of Phthalates in Indoor Air in Vietnam

Abstract

Several previous studies, phthalates have been reported to be reproductive and endocrine toxicants in laboratory animals. However, the wide use of phthalates is the cause of common distribution of these compounds in various environments such as air, dust, wastewater, and food, etc., and their metabolism forms have been found in human blood and urine. In which, the distribution coefficients of phthalates and volatile compound in indoor air is attracting a lot of attention. This report mentions the distribution coefficients of ten phthalates between vapor phase and particle phase from indoor airin some cities in Vietnam. The gas-particle partition coefficient (Kp) and the octanol-water partition coefficient (Kow) of phthalates were calculated on the basis of the measured concentration in vapor phase and particulate phases. The meanlogKp valuesof ten phthalates ranged from -2.16 to -1.31, meanwhile the mean logKow values ranged from 10.23 to 11.08. It is the difference of the logKp and logKow values between standard and real indoor air conditions. These results suggest that the Kp and Kow values of phthalates are strongly depend on the environmental conditions.

Keywords

Phthalates, Kp, Kow, indoor air

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