Polydimethylsiloxane (PDMS) was chosen as a model siloxane molecule so a method could be developed for its quantification on cotton fabric with the use of ATR/FT-IR spectroscopy. PDMS is transferred onto an ATR crystal in the presence of methanol under pressure. This eliminates strong spectral interference from cellulose and improves precision. Methanol was needed to swell the fibers to release PDMS. The method is more sensitive, rapid, and nondestructive compared to extraction and transmission techniques.
Lee SmithA., Analysis of Silicones (John Wiley and Sons, New York, 1974), Chap. 4, p. 59.
4.
HaslamJ.WillisH. A., Identification and Analysis of Plastics (D. Van Nostrand, Princeton, 1965), p. 262.
5.
Shreedhara MurthyR. S.LeydenD. E.Keith GrimeJ., “Determination of Triglycerids on Cotton Fabrics Using Fourier Transform Attenuated Total Reflection Infrared Spectroscopy,” to appear in Appl. Spectrosc, Nov., 1985.
