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The reconstructed ion chromatograms at the MS3 scan stage of acid-labile 4-ABP- and AαC-Hb adducts in (A) nonsmoker (R01) and (B) smoker (R07), following derivatization with acetic anhydride. (C) Product ion spectra of N-acetyl-4-ABP and N-acetyl-AαC and their internal standards obtained from the smoker’s blood sample. The * signifies that the ion at m/z 147.1 in the product ion spectrum of N-acetyl-d5-4-ABP contains an isobaric interferent.
