FT-IR is very simple and rapid technique to perform this

analysis. It does not require complex sample preparation.

Spectrum TwoTM gives us the flexibility to run the samples in

liquid phase with 0.1mm path length cells. This application is

useful in oil or petroleum segment wherein we need to check

the quality of oil on the basis of carbon type.

Note: If sample has a large aromatic content (approximately 20

%) the paraffinic peak may become masked by adjacent peaks,

making accurate measurement difficult.

The calculation can be performed either manually or

using software calculations. Then tangents

are drawn across the transmission maxima on either side of the

peak being measured,  and a vertical line is

drawn through the peak minimum. The intersection of these lines

gives the value of intensity Io and the intersection of the vertical

with the peak minimum gives value of I. The values are to be read

of Io and I for CA (1600 cm-1

) and CP (720 cm-1

). CN is calculated

from the difference