Determination of aqueous solubilities of tetrachlorobenzyltoluenes individually and in a mixture by a modified generator column technique

Abstract

Determination of aqueous solubilities of tetrachlorobenzyltoluenes individually and in a mixture by a modified generator column technique General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible.

Solid Phase Dosing and Sampling Technique To Determine Partition Coefficients of Hydrophobic Chemicals in Complex Matrixes

“…Classical spiking procedures of hydrophobic chemicals with an organic solvent often lead to instable and variable concentrations and solutions containing not completely dissolved substances. The application of a generator column (24,25) or a partitioning driven administrator (26,27) to prepare aqueous solutions is an improvement, since it generates "real" solutions with only dissolved molecules. The two phenomena (incomplete separation of phases and unstable aqueous solutions) lead to a large variability in partition and sorption coefficients in the literature (7,8,28).…”

Gas chromatographic determination of liquid vapour pressure and heat of vaporization of tetrachlorobenzyltoluenes

“…The isothermal pure liquid vapour pressure (log Pg) can ultimately be written as a function of the isothermal Kovlits index of test compound i (/,), the derivative of the vapour pressure of a reference alkane to its Kovfits index [(dlog P;)/d/. ], the vapour pressure of the reference "alkane" with z=0 (log P.2), and the ratio of activity coefficients mentioned above [log (y,/~_ )]: log P, = (dlog P:/dl:)l, + log PH2 q-log (~/'~) (3) In this method the first step is the GLC measurement of net retention times of test compounds and n-alkanes at different temperatures and the calculation of Kovfits indices from these:…”

On the Possible Coplanar Conformation and Dioxin‐type Toxicity of Tetrachlorobenzyltoluenes

“…Because of the structural resemblance and the large similarities in the physical chemical properties of PCBs and TCBTs, namely the comparable high n-octanol/water partition coefficient [4], high bioconcentration factor [5], low aqueous solubility [6] and low vapour pressure [7], comparable toxicological and biological activities of TCBTs and PCBs may be expected. Comparable environmental persistence for structurally related PCBs and * To receive all correspondence TCBTs was indicated in a preliminary study on the biodegradability of TCBTs in activated sludge and in cultures of Alcaligenes SP JB1 [8].…”