Figure 3.

(a) Selected region of 500 MHz 2D TOCSY spectrum of the lipid fraction of a lyophilized bovine milk sample in CDCl₃ (T = 298 K, 32 repetitions of 512 increments, total experimental time 5 h 5 min); (b) selected row on the bis-allylic protons of linoleic acid (δ = 2.77 ppm) of the 2D TOCSY spectrum as displayed in (a); (c) 1D TOCSY of the same solution as in (a) with the selective pulse on the bis-allylic protons at δ = 2.77 ppm is illustrated for comparative reasons (number of scans, 256; acquisition time 4.3 s; relaxation delay, 5 s; total experimental time ~25 min).