SUPERCRITICAL-FLUID EXTRACTION COUPLED DIRECTLY WITH FOURIER-TRANSFORM INFRARED SPECTROMETRY

The combination of sample preparation and chromatographic separation v ia a hyphenated technique is becoming somewhat routine. For example, n umerous reports are available on supercritical fluid extraction (SFE) coupled with gas chromatography (GC) and supercritical fluid chromatog raphy (SFC). The employment of SFE on line with spectrometric analysis is considerably more novel with only a couple of laboratories having reported on the technique. Fourier transform infrared (FT-IR) spectrom etry currently serves as the only notable, quantifiable example to dat e. This manuscript reviews the state-of-the-art concerning SFE-FT-IR a nd its application to primarily textile fiber finishes. The adaptabili ty of FT-IR detection for a variety of SFE protocols (e.g. static, dyn amic, static-dynamic, direct analysis, intermediate trapping) and fibe r (e.g. polyurethane, polyamide, polyester) finishes is described.