“…2 H 0 / 2 H 3 -MPIA was synthesized by mixing 2-(4-nitro-phenyl)-1H-phenanthro [9,10-d]imidazole with either CH 3 I or C 2 H 3 I. This derivatization technique is characterized by the simplicity of the synthesis of the ICD reagents, economic nature, high sensitivity, and its ability to work in very complex matrices (Sun, Wang, Cai, Fu, & You, 2014 The isotope-coded parts of the reagents are red colored, whereas the reactive group toward the analytes are blue colored. APC, 4-[2-(trimethylammonio)ethoxy]benzenaminium halide; BDHT, 2,4-bis(diethylamino)-6-hydrazino-1,3,5-triazine; GP, Girard's reagent P; HIQB, 2-(2-hydrazinyl-2-oxoethyl)isoquinolin-2-ium bromide; HMP, 2-hydrazino-1-methylpyridine; ICD, isotope-coded derivatization; MPIA, 4-(1-methyl-1H-phenanthro [9,10-d]…”