What is FTIR spectrometer used for?

FTIR spectra reveal the composition of solids, liquids, and gases. The most common use is in the identification of unknown materials and confirmation of production materials (incoming or outgoing). The information content is very specific in most cases, permitting fine discrimination between like materials.

What is the difference between FTIR and ATR?

FTIR is any Fourier Transform Infrared spectroscopy method in any measuring geometry, may it be transmission, reflection or whatever. ATR stands for attenuated total reflection and is developed in order to enhance the surface sensitivity since IR spectroscopy is a bulk method.

Can FTIR detect silicone?

Infrared spectroscopy and, in particular, Fourier transform infrared spectroscopy (FTIR), is widely available and the easiest technique for detecting the presence of silicones and obtaining information about their structure. Quantification is possible using one of the strong silicone absorption peak signals.

What region of the IR spectrum does the Si O stretch occur?

Si—O—Metal 1000-900 Silanolates show a strong band in the range 1000-900 cm-1.

What kind of information do you get from FTIR?

FTIR is a rapid, nondestructive, time saving method that can detect a range of functional groups and is sensitive to changes in molecular structure. FTIR provide information on the basis of chemical composition and physical state of the whole sample (Cocchi et al. 2004).

What is the difference between transmittance and absorbance in FTIR?

Actually, FTIR never measures absorption, but transmittance or reflectance. Somewhat naively, it is assumed that what is not transmitted must be absorbed, on this the definition of transmittance absorbance is based (A = -log T). Furthermore, it is compatible with Maxwell’s equations while absorbance is not.

What is the difference between ATR and KBr?

Actually, both techniques, are used for functional groups analysis. FTIR mainly used for powder analysis, in this technique the samples are mixed with KBr powder as matrix (holder). While ATR are used for surface analysis without any extra materials or holder.

How do you test for the presence of silicone?

Silicone can be detected by Fourier transform infrared spectroscopy (FTIR), with some degree of molecular identification by comparison of the suspect contaminant with a known material. The technique can be performed on specific areas of the surface, such as suspect particles.

What is siloxane polymer?

Siloxanes are polymeric organic silicones that comprise a backbone of alternating silicon-oxygen [Si-O] units with organic side chains attached to each silicon atom.