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(A) Collisional activation and tandem mass spectrometry of cholesteryl linoleate CE(18:2) [M+NH4]+ at m/z 666. The major product ion corresponds to the cholesteryl cation at m/z 369. (B) Collisional activation and tandem mass spectrometry of the mixed triacylglycerol TG(16:0_18:2_18:1) [M+NH4]+ at m/z 874.8. The diglyceride-like product ions at m/z 575,577, and 601 reveal the loss of each fatty acyl group as a free carboxylic acid plus neutral ammonia (NH3).
