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Issue 10, 2007
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Passive sampling: partition coefficients for a silicone rubber reference phase

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Abstract

Silicone rubber sheeting can be used as a passive sampling device for hydrophobic organic contaminants in the environment to determine the available concentrations in water and sediments. Reliable sampler–water partition coefficients are required to determine the sampling rates and the dissolved contaminant concentrations in water and in sediment pore water. Log partition coefficients (logKsr,w) for silicone rubber–water have been estimated for 32 polycyclic aromatic hydrocarbons (PAHs), 2 deuterated PAH analogues and 32 chlorobiphenyls (CBs) using the cosolvent method, with methanol as cosolvent. Strong linear relationships were found with literature values for the corresponding log octanol–water partition coefficients (logKow) for both CBs and PAHs, confirming that partitioning into the silicone rubber is strongly determined by the hydrophobicity of the compounds, which suggests logKow is a good predictor of logKsr,w and that absorption is the main mechanism for accumulation of analytes into the silicone rubber polymer.

Graphical abstract: Passive sampling: partition coefficients for a silicone rubber reference phase

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Publication details

The article was received on 04 May 2007, accepted on 06 Jul 2007 and first published on 27 Jul 2007


Article type: Paper
DOI: 10.1039/B706716J
Citation: J. Environ. Monit., 2007,9, 1116-1121
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    Passive sampling: partition coefficients for a silicone rubber reference phase

    K. Yates, I. Davies, L. Webster, P. Pollard, L. Lawton and C. Moffat, J. Environ. Monit., 2007, 9, 1116
    DOI: 10.1039/B706716J

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