Abstract
1, 4-Dioxane has been frequently detected in river water, and particularly in ground water polluted by volatile halogenated hydrocarbons. However conventional determination method was not suitable for analyzing many samples due to the complexities and difficulties in extraction procedures. In this study, the application of solid phase extraction was investigated in order to simplify a preconcentration procedure. Water samples were passed through activated carbon catridge and styrene divinyl benzene polymer cartridge connected in a series, and 1, 4-dioxane on activated carbon cartridge was desorbed with lml of acetone. The desorbed solution was directly subjected to GC/MS without loss of 1, 4-dioxane during con-centration procedure, hence rapid and sensitive determination of 1, 4-dioxane in water sample became possible. Detection limit was 0.1 μg/l . This method was applied to the analysis of real samples, and the results were nd-16 μg/l for river samples from 10 sites in six rivers, 0.3-0.9 μg/l for coastal seawater, nd-79 μg/l for ground water and 0.2-1.5 μg/l for tap water from 6 Cities in Kanagawa Prefecture in Japan from 1995 to 1996. This method was useful to elucidate the sources and diffusion mechanism in an aquatic environment.
