The analytical methods for dioxins in water sample from wastewater to tap water were
reviewed. For extraction method, liquid-liquid extraction (LLE) has been widely used,
however, this process needs too much time and man power. New approach including solid
phase extraction (SPE) is now applicable to large volume of water sample with high
extraction efficiency. Column clean up in classical analytical methods were very
complex and time consuming procedures during decade. Modifications were tried to
decrease solvent and reagents volume. Moreover, use of column connection method has
been demonstrated in the environmental matrices. Instrumental configurations also have
been used, in which GC/MS/MS with large volume injection approach can analyze picogram
levels. Absolute sensitivities of HRMS increased compared to the previous double
focusing sector type mass spectrometers. Based on these analytical evolutions during
last 10years, we tried to optimize the analytical method for dioxins in water sample
from sample extraction to instrumental analysis.