Fig. 3.

a MRM chromatograms (quantifier and qualifier ions) of a solvent blank, a non-spiked breast milk “blank,” a matrix-matched calibrant (0.43 ng*mL⁻¹ for genistein and 1.5 ng*mL⁻¹ for dihydroferulic acid), and a breast milk sample obtained from a Nigerian mother. b MRM chromatograms (quantifier and qualifier ions) of daidzein and daizein-7-β-D-glucuronide from the same mother and same timepoint, with the MRM chromatograms of a solvent blank, a matrix-matched breast milk “blank,” and a matrix-matched calibrant (0.037 ng*mL⁻¹ for daidzein and 0.11 ng*mL⁻¹ for daizein-7-β-D-glucuronide)