Analyte: 4-aminobiphenyl, CAS Number: 92-67-1; Analyte: 2-Acetylaminofluorene, CAS Number: 53-96-3; Analyte: p-(Dimethylamino)azobenzene, CAS Number: 60-11-7; Analyte: 3,3'-Dimethylbenzidine, CAS Number: 119-93-7; Analyte: a,a-Dimethylphenethylamine, CAS Number: 122-09-8; Analyte: 1-Naphthylamine, CAS Number: 134-32-7; Analyte: 2-Naphthylamine, CAS Number: 91-59-8; Analyte: N-Nitrosopiperidine, CAS Number: 100-75-4; Analyte: 5-Nitro-o-toluidine, CAS Number: 99-55-8; Analyte: N-Nitrosomorpholine, CAS Number: 59-89-2; Analyte: N-Nitrosomethylethylamine, CAS Number: 10595-95-6; Analyte: N-Nitrosopyrrolidine, CAS Number: 930-55-2; Analyte: N-Nitrosodi-n-butylamine, CAS Number: 924-16-3; Analyte: N-Nitrosodiethylamine, CAS Number: 55-18-5; Analyte: 2-Picoline, CAS Number: 109-06-8; Analyte: p-Phenylenediamine, CAS Number: 106-50-3 . EPA, Method: 8270D.