High-performance liquid chromatographic measurement of the 1-octanol-water partition coefficient of s-triazine herbicides and some of their degradation products

1-Octanol-water partition coefficients (K-ow) of s-triazines and some of their degradation products were determined using two reversed-phase high-performance liquid chromatography (HPLC) methods. In the first method, an octadecyl column was coated with 1-octanol and eluted with 1-octanol-saturated water. Using this method, a maximum log K-ow of 2.86 could be determined. For higher values a recently developed gradient HPLC method was used. The determined 1-octanol-water partition coefficients are helpful for studies and mathematical models dealing with the fate of s-triazine herbicides and their degradation products in the environment. (C) 1998 Elsevier Science B.V.