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Effect of the SPE purification on the detection of T3- derivatized DIALs. (A) Optimal SPE purification procedure. (B) Total ions chromatograms (TICs) of tomato samples with (blue) and without (red) SPE purification (top) and EICs of representative endogenous T3-derivatized DIALs with (blue) and without (red) SPE purification (bottom).
