## 2 jul. 2012

### Looking to the spectra (sunflower oil)

This figure shows the inverse correlation between the oleic acid (C18:1) and Linoleic acid (C18:2) for this data set:

Figure 1 shows the spectra of a sample set of sunflower oils.A second derivative (Fig 2) helps to define better the spectra bands and with the zoom  option we can see certain areas of the spectra.
There are an inverse correlation between the oleic acid and  linoleic acid in the sunflower oils. In this spectra sample set  (all sunflower oils), we can see how the band at aprox 1720 changes (figure 3). We can see clearly in this figure the sunflower oil high oleic (lower intensity at 2144 nm: Fig 4 and peak more defined at 1722 nm: Fig 3).