VAPOR PRESSURES OF SIX BROMINATED DIPHENYL ETHER CONGENERS

摘要

Subcooled liquid vapor pressures(P~°L)of six polybrominated diphenyl ether(PBDE)congeners containing three to seven bromine atoms were determined using the gas chromatograph retention time technique. Values ranged from 2.3×10~-7 to 1.45× 10~-4 Pa at 25 deg. C. An increase in the number of bromine atoms tended to decrease P~°_L according to the correlation log P~°_L = -0.692 (bromine number) - 1.76(R~2 = 0.953, p < 0.001). In addition, the first such data for individual PBDE congeners demonstrates that P~°_L would vary four orders of magnitude over environmentally relevant temperatures.