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

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
		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