Table 4: Selection of characteristic fragment ions (m/z) for mass chromatogram analysis to target organic compounds in the GC/MS total ion chromatogram (TIC).

Fragment ion mass selected, m/z Compound or Class represented Compound group in sediment extracts
91, 105, 119 Alkyl benzenes LAB
128, 142 Alkyl naphthalenes PAH
149 Phthalic acid alkyl esters Plasticisers
164 Azulene Aromatic
168 Benzofuran Aromatic compound
170 Trimethyl naphthalene Alkyl Pah
178 Anthracene phenanthrene PAH
192 Methyl anthracene Alkyl PAH
202 Pyrene/Fluoranthene PAH
228 Chrysene benzanthracene PAH
252 Perylene PAH
191 N,N-Diethylamide-3- methyl benzamide Insecticide
219 Phenyl-β-naphthylamine Corrosion inhibitor
205, 220 Bis-phenol A and related compounds Antioxidant
188 Benzophenone Additive
210 Hexachlorobenzene Pesticide