Fig. 5.

Chromatograms of unspiked and isotope labeled standard spiked porcine skeletal muscle matrix. Matrix only sample (bottom) shows total ion chromatogram from the MRM transitions for isotope labeled TCA intermediates (see Table 2). Extract ion chromatograms are shown for matrix spiked with 50 μg L⁻¹ LAi, 5 μg L⁻¹ PAi, 12.5 μg L⁻¹ FAi, 2.5 μg L⁻¹ SAi, 5 μg L⁻¹ 2OHGAi, 2.5 μg L⁻¹ αKGi, and 2.5 μg L⁻¹ CAi and are vertically offset for clarity