Determination of Aromatic Compounds in Water by Solid phase Microextraction and Ultraviolet Absorption Spectroscopy. 1. Methodology

摘要

A simple method is described for determining aromatic compounds (i.e., benzene, toluene, ethylbenzene, etc.) in water that combines solid phase microextraction(SPME) and ultraviolet(UV) absorption spectroscopy. The extrac- tion medium consists of a small"chip" of poly(dimethyl- siloxane)(total volume of ～80μL)that is immersed in a water sample contaminated with an aromatic compound. Equilibrium is first allowed to establish between the analyte in the water and the extraction medium, and the concentration of the aromatic compound is then deter- mined directly in the sorbent chip by UV spectroscopy.