An exchangeable Si wafer internal reflection element for FT-IR measurementof water sample

A lipophilic-layer-coated Si internal reflection element (SRE) is reported as an exchangeable probe for Fourier-transform infrared spectroscopic measu rement of organic contaminants in water. The SRE is installed in the reflec tion cell by being stacked on a light-guiding crystal. The lipophilic layer is a self-assembled layer made from octadecyltrichlorosilane. We theoretic ally and experimentally confirmed that the cell comprising the SRE placed o n a ZnSe-light-guiding crystal could measure n-hexane dispersed in water. ( C) 2001 Elsevier Science B.V. All rights reserved.