Atmospheric gas-particle partitioning of E-EHMC and Z-EHMC estimated from their liquid vapour pressures at 298.15 K

CHIAPPERO MALISA; PEGORARO CÉSAR N; MONTEJANO HERNAN

International Journal of Environment and Health

InderScience Publishers

Año: 2018 vol. 9 p. 66 - 83

1743-4955

The UVB filter E-ethylhexyl p-methoxycinnamate (E-EHMC) is extensively used as a UV protectant in commercial products. Its photoisomerisation into Z-EHMC is well known. In this work, we estimate the thermodynamic properties of the vaporisation processes of E-EHMC and Z-EHMC using an indirect experimental method developed in our laboratory named Effusion Method under Atmospheric Pressure (EMAP). The atmospheric particle bound fractions and air-particulate partition coefficients for E-EHMC and Z-EHMC were derived from the vapour pressure P/Pa (298.15 K) estimated by EMAP methodology.