Terpenes - Mix 4, 1000μg/ml in Methanol, 5ml

2-Bromo-1,3,7,8-tetrachlorodibenzo-p-dioxin (>95%), 1.2ml x 48ug/ml, toluene

Picene, 50 µg/mL in Toluene, 1ml

2H-benzimidazole-2-thione, 1,3-di-hydro-4(or 5)-methyl