Determination of Cyclopropane Fatty Acids in Food of Animal Origin by ¹H NMR

Figure 5

Enlargement of ¹H NMR 600 MHz spectra in the zone from −0.5 to 0.8 ppm, showing the signal of the cyclopropane ring (at −0.35 ppm) used for CPFA quantification in cured ham (negative to CPFAs) and cheese and fish fat (positive to CPFAs).